Article
Nanoscience & Nanotechnology
Faizan Ahmad, Rachana Kumar, Sunil Singh Kushvaha, Mahesh Kumar, Pramod Kumar
Summary: This study analyzed the n-GaN/p-Bi2Se3 topological heterojunction using Raman spectroscopy and ultrafast transient absorption spectroscopy, exploring the surface states, energy levels, charge transfer, and carrier relaxation processes. Electrical measurements were also conducted to investigate the influence of interface states on the electrical and optical performance.
NPJ 2D MATERIALS AND APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Xuan Wang, Yehua Tang, Wanping Wang, Hao Zhao, Yanling Song, Chaoyang Kang, Kefan Wang
Summary: In this study, Bi2Se3 film was deposited onto silicon nanowires using vacuum evaporation method to create a bulk heterojunction, resulting in a self-powered photodetector with a wide detection range and fast response speed. This silicon-based photodetector shows promise for near- and mid-infrared applications, making it a potential candidate for future optoelectronic devices.
Article
Engineering, Electrical & Electronic
Rahul Kumar, Vishnu Aggarwal, Aditya Yadav, Sudhanshu Gautam, Sandeep Singh, Ramakrishnan Ganesan, Veerpal P. Singh P. Awana, Govind Gupta, Senthil Kumar Muthusamy, Sunil Singh Kushvaha
Summary: Recent progress in topological insulating materials opens up promising avenues for their applications in quantum, electronic, and optoelectronic devices. This study focuses on the fabrication of topological insulator Bi2Se3/GaN hybrid structure-based photodetectors (PDs) and investigates their photoresponse characteristics in the ultraviolet region.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sartaj Wali, Qin Yin, Jiao Li, Guoxiang Si, Muhammad Shafi, Junfeng Ren, Hongbin Zhang
Summary: Organic-inorganic heterostructures (OIHs) have unique features for electronic and optoelectronic applications, and show promising performance in photodetectors. By utilizing topological insulators and organic small molecule semiconductors, OIHs demonstrate excellent diode characteristics and high responsivity, detectivity, and response speed under near-infrared light illumination. These results suggest a novel opportunity for device applications in the future.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Nanoscience & Nanotechnology
Connie H. Li, Jisoo Moon, Olaf M. J. van't Erve, Darshana Wickramaratne, Enrique D. Cobas, Michelle D. Johannes, Berend T. Jonker
Summary: Current-generated spin in topological insulator surface states can switch the magnetization of an adjacent ferromagnet efficiently. However, most of the current in FM/TI heterostructures is shunted through the ferromagnetic metal. Placing an insulating layer between the topological insulator and ferromagnetic metal can prevent current shunting and preserve the topological surface states.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Physics, Applied
Xin Liao, Chang Xu, Zi-Pu Fan, Ying-Ying Lan, Na Li, Chun-Guang Chu, An-Qi Wang, Dong Sun, Zhi-Min Liao
Summary: The combination of 2D Dirac semimetal graphene and 3D counterpart Cd3As2 in Dirac heterostructures can overcome the weak optical absorption in graphene-based devices and the dark current in pure Cd3As2 photodetectors, leading to high-performance photodetectors with broadband detection, high sensitivity, and rapid response.
APPLIED PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Hasmat Mondal, Samit K. Ray, Poulomi Chakrabarty, Soumili Pal, Gaurab Gangopadhyay, Sourav Das, Shreyasi Das, Rabaya Basori
Summary: Chlorophyll-b extracted from spinach leaves is studied for its potential use on Si nanowire heterostructures. The Chl-b/SiNW heterostructure shows superior optoelectronic performances compared to control Si NW devices, including high sensitivity and faster response time.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Xin Hong, Jun Shen, Xinyue Tang, Yi Xie, Min Su, Guojun Tai, Jing Yao, Yichao Fu, Junyang Ji, Xueqin Liu, Jun Yang, Dapeng Wei
Summary: By growing Bi2Se3 film on a silicon substrate and utilizing the light trapping effect of micropyramidal substrate and the high structural quality of the in-situ grown interface, a Bi2Se3/Si heterostructure with good photoresponse to broadband laser illumination is achieved. In addition, the etching process plays a critical role in improving the photoresponse.
Article
Materials Science, Multidisciplinary
D. Esra Yildiz, Adem Kocyigit, Murat Yildirim
Summary: The importance of photodetectors has increased due to their potential in automation systems and optical communications. In this study, Al/TiO2/p-Si and Al/ZnO/p-Si Schottky-type photodetectors were fabricated and their photodetection properties were compared. The Al/ZnO/p-Si photodetector showed better detection performance at a wavelength of 550 nm.
Article
Optics
Mohamed Abd - El Salam, H. Abdel-Khalek, Fatma M. Amin, Ahmed R. Wassel, Ahmed M. El-Mahalawy
Summary: A vertical p-n heterojunction broadband photodetector based on topological insulators was fabricated through thermal evaporation of thin films. The device exhibited high photosensitivity and fast response after annealing, with improved spectral responsivity and switching behavior compared to other topological insulator devices. This topological insulator photosensor shows promise as a potential candidate for high-performance optoelectronics.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Zengda Wang, Peiyu Zeng, Shuojie Hu, Xiaomei Wu, Jiaoyan He, Zhangting Wu, Wenhui Wang, Peng Zheng, Hui Zheng, Liang Zheng, Dexuan Huo, Yang Zhang
Summary: A novel ReS2/graphene/WSe2 heterostructure prepared by dry transfer demonstrates air-stable and high-performance photodetection, with specific detectivities up to 10(10) Jones and response time on the order of a millisecond. The heterostructure also exhibits polarization-sensitive photodetection and broad photoresponse from visible to infrared range, achieving a high photoresponsivity of 1.02 A W-1.
Article
Chemistry, Physical
Sourav Das, Sourabh Pal, Karin Larsson, Debabrata Mandal, Soumen Giri, Pallab Banerji, Amreesh Chandra, Rabaya Basori
Summary: Core-shell nanowire heterostructure is a new architecture for photodetector applications, which enhances light absorption and improves photodetector performance with enlarged active surface area. SnS2, as a coating material, has gained increasing interest in next-generation optoelectronic materials. In this study, the hydrothermally grown SnS2 and Si nanowire (SiNWs) core-shell heterostructure exhibited enhanced optoelectronic performance. The uniform coating of hydrothermally grown SnS2 on Si nanowire increased the effective junction area of the heterostructure, resulting in improved optoelectronic properties over a broad spectral range (300 - 1100 nm). Specifically, under 340 nm illumination, the core-shell photodetector showed high responsivity (-383 A/W) and extremely high external quantum efficiency (-2 x 105 %) at a low optical power (-20 nW/mm2). This SnS2/SiNWs core-shell heterostructure with significantly enhanced optoelectronic performance holds great potential for high-efficiency photodetector development.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Cuiying Pei, Peng Zhu, Bingtan Li, Yi Zhao, Lingling Gao, Changhua Li, Shihao Zhu, Qinghua Zhang, Tianping Ying, Lin Gu, Bo Gao, Huiyang Gou, Yansun Yao, Jian Sun, Hanyu Liu, Yulin Chen, Zhiwei Wang, Yugui Yao, Yanpeng Qi
Summary: Recently, the natural heterostructure of (PbSe)(5)-(Bi2Se3)(6) has been confirmed as a topological insulator. Superconductivity is induced in (PbSe)(5)(Bi2Se3)(6) by applying high pressures, resulting in a critical temperature (Tc) of 4.6 K. Under further compression above 30 GPa, a new superconducting state emerges with a Tc of 6.0 K. The emergence of the two distinct superconducting states is suggested to be concurrent with the pressure-induced structural transition in this topological heterostructure.
SCIENCE CHINA-MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Wenqing Liang, Lintao Wang, Ying Li, Fei Zhang, Xu Chen, Di Wu, Yongtao Tian, Xinjian Li, Chongxin Shan, Zhifeng Shi
Summary: A strategy of decorating Cs3Cu2I5 nanocrystals on Si nanowire arrays to form a hybrid structure was proposed to enhance the UV photodetection ability. The hybrid detector exhibited high photoresponsivity, specific detectivity, large on/off ratio, and outstanding operational stability.
MATERIALS TODAY PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Ming Yu, Chaocheng Fang, Jianfu Han, Wenliang Liu, Shengmei Gao, Kai Huang
Summary: This paper reports a high-quality vdWs Bi2O2Se/Bi2Se3 heterostructure photodetector with excellent performance such as high on/off ratio, fast response speed, and broadband photoresponse.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Zhizhen Chang, Zhengjun Lu, Wei Deng, Yandi Shi, Yuye Sun, Xiujuan Zhang, Jiansheng Jie
Summary: Narrow-bandgap Sn-Pb mixed perovskite single crystals show great potential as photoactive materials for efficient and low-cost near-infrared (NIR) photodetectors. However, the phase separation issue during crystallization process leads to the degradation of optical and electronic properties. In this study, a low-temperature space-confined technique (LT-SCT) is proposed to reduce the crystallization velocities and create pure-phase (FASnI(3))(0.1)(MAPbI(3))(0.9) single crystals. These crystals exhibit excellent crystallinity, high hole mobility, and low surface trap density, enabling their application in self-powered NIR photodetectors with outstanding performance. The work contributes to the development of Sn-Pb mixed perovskite single crystals and offers a promising candidate for efficient and low-cost NIR photodetection.
Article
Chemistry, Physical
Yuan Lin, Bingchang Zhang, Yihao Shi, Yongchao Zheng, Jia Yu, Jiansheng Jie, Xiaohong Zhang
Summary: Silicon-based field effect transistor (FET) sensors with high sensitivity have great potential for detecting chemical/biological species. This study investigates the impact of strain on the field-effect sensing property of silicon wires using humidity sensing as an example. The results show that the humidity sensitivity of FET sensors based on silicon wires increases with tensile strain but decreases with compressive strain. The findings highlight the potential of strain engineering in modulating the field-effect sensing property of Si wires for highly sensitive FET sensors.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Physics, Multidisciplinary
Minghu Pan, Xin Zhang, Yinong Zhou, Pengdong Wang, Qi Bian, Hang Liu, Xingyue Wang, Xiaoyin Li, Aixi Chen, Xiaoxu Lei, Shaojian Li, Zhengwang Cheng, Zhibin Shao, Haoxuan Ding, Jianzhi Gao, Fangsen Li, Feng Liu
Summary: In this study, we report the surface growth of a self-assembled monolayer of 2D hydrogen-bond organic frameworks (HOFs) on an Au(111) substrate and the observation of flat bands (FBs). The highly ordered THPB HOF domains and the FB over the whole Brillouin zone were observed through high-resolution scanning tunneling microscopy or spectroscopy and angle-resolved photoemission spectroscopy, respectively. Density functional theory calculations and analyses showed that the observed FB arises from a hidden electronic breathing-kagome lattice without atomically breathing bonds.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
Di Wu, Chenguang Guo, Longhui Zeng, Xiaoyan Ren, Zhifeng Shi, Long Wen, Qin Chen, Meng Zhang, Xin Jian Li, Chong-Xin Shan, Jiansheng Jie
Summary: Being able to sense broadband infrared light is crucial for various applications. Two-dimensional topological semimetals have been explored for this purpose due to their electronic structure and energy dispersion relation. However, their limitations in charge separation efficiency, noise level, and integration hinder their use in technology.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Jiarong Yao, Xinzi Tian, Bin Li, Zhaofeng Wang, Xiali Zhang, Jiansheng Jie, Fangxu Yang, Rongjin Li, Wenping Hu
Summary: A novel nonclassical crystallization mechanism is designed to reduce the defect density of organic single crystals and improve the mobility and optoelectronic properties of organic semiconductors. This research is of great significance for the development of next-generation electronics.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jiarong Yao, Lingjie Sun, Yanling Xiao, Jinyu Liu, Jiansheng Jie, Xuying Liu, Fangxu Yang, Yajing Sun, Rongjin Li, Wenping Hu
Summary: This study investigates the relationship between surface free energy and crystallization tendency of 2D organic crystals, and proposes a surface free energy anisotropy factor to measure this tendency. Two organic compounds were studied, and the one with a larger surface free energy anisotropy factor showed a higher tendency for 2D crystallization.
SCIENCE CHINA-MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Zhizhen Chang, Wei Deng, Xiaobin Ren, Xinyue Liu, Gan Luo, Yuan Tan, Xiujuan Zhang, Jiansheng Jie
Summary: This study reports a universal and effective methodology for fast printing of high-quality Sn-Pb mixed perovskite films at an unprecedented speed of 90 m h(-1) by altering the wetting and dewetting dynamics of perovskite inks with the underlying substrate. The high-speed printed Sn-Pb perovskite films have large perovskite grains (>100 μm) and excellent optoelectronic properties, yielding highly efficient self-driven NIR photodetectors with a large voltage responsivity over 4 orders of magnitude. The potential application of the self-driven NIR photodetector in health monitoring is also demonstrated.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Lutao Li, Yun Hu, Yuan Chen, Chen Wang, Guoxiang Zhao, Xinyu Du, Chaoqiang Wang, Lingbo Xiao, Zheng Lu, Jiong Wang, Dan Wang, Jiansheng Jie, Jingsong Huang, Guifu Zou
Summary: High color purity is an important feature for single-crystal metal halide perovskite light-emitting diodes (LEDs). However, the absence of effective surface defect passivation hinders the achievement of high color purity in single-crystal perovskite LEDs. In this study, a fully wrapped structure using ultra-thin polymethyl methacrylate is proposed to passivate the surface of free-standing CsPbBr3 single-crystal films, leading to improved color purity and large luminescent area. The interaction between the C(sic)O bond in polymer chains and the Lewis acid PbBr2 is found to play a key role in surface passivation.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yanling Xiao, Wei Deng, Jiajing Hong, Xiaobin Ren, Xiujuan Zhang, Jialin Shi, Fangming Sheng, Xiaohong Zhang, Jiansheng Jie
Summary: The development of a simple double-blade-coating printing technique using wetting-patterned substrates allows for the production of highly crystalline organic semiconductor (OSC) thin films. This method significantly reduces the number of nucleation events, resulting in thin films with single-crystal domains and high yield. The organic field-effect transistor array fabricated from these patterned OSC thin films exhibits excellent performance with an average mobility of 11.5 cm(2) V-1 s(-1), which is 12.5-fold higher than the reference sample fabricated using conventional single-blade coating. This approach has the potential to be widely applied to other soluble organic materials, enabling the fabrication of multicomponent integrated electronics.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Optics
Huanyu Zhang, Xiujuan Zhang, Chaoqiang Wang, Tingxiu Yu, Geng He, Ruofei Jia, Azhar Ali Ayaz Pirzado, Jie Lin, Jingsong Huang, Jun Peng, Jiansheng Jie, Xiaohong Zhang
Summary: A nonstoichiometric composition tuning strategy has been developed to improve the device performance of perovskite single-crystal light-emitting diodes (SC-PeLEDs) by enhancing the crystal quality, reducing trap density, and elevating the energy level of the perovskite single crystals.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Analytical
Yuan Tan, Xinwei Zhang, Rui Pan, Wei Deng, Jialin Shi, Tianxing Lu, Junye Zhang, Jiansheng Jie, Xiujuan Zhang
Summary: Organic phototransistors (OPTs) as optical chemical sensors have significantly advanced, thanks to the development of new materials, device structures, and device interfacial engineering. In this study, a fully printed fabrication process is demonstrated, which allows the realization of a high-yield and low-voltage OPT array. The OPTs exhibit a low operation voltage of -1V and high photosensitivity, making them suitable for various low-power applications. The fabrication process may provide a pathway to integrated and low-power organic optoelectronic circuits for real-world applications.
Article
Chemistry, Multidisciplinary
Jinhui Chen, Jinwen Wang, Shuai Chen, Jing Pan, Ruofei Jia, Chaoqiang Wang, Xiaofeng Wu, Jiansheng Jie, Xiujuan Zhang
Summary: Monolayer organic crystals offer a unique opportunity for studying the charge transport of organic semiconductors due to their 2D nature. However, large-scale growth of these crystals is challenging. This study proposes a self-limited epitaxial growth strategy to achieve large-area patterned growth of monolayer organic crystals. By confining molecular nucleation and crystallization in wetting patterns, single nuclei are formed, promoting the assembly of organic molecules. This approach has enabled the centimeter-sized patterned growth of mixed monolayer organic crystals, with potential applications in high-performance optoelectronic devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jinwen Wang, Zheng Ren, Jing Pan, Xiaofeng Wu, Jiansheng Jie, Xiaohong Zhang, Xiujuan Zhang
Summary: For the first time, a method of anchored crystal-seed epitaxial growth is developed for wafer-scale growth of 2D organic semiconductor single crystals. The crystal seed is firmly anchored on the liquid surface, ensuring steady epitaxial growth. This approach effectively eliminates substrate defects and enhances the 2D growth of organic crystals, providing a new avenue for high-performance organic electronics.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Meng Zhang, Shuaiquan Xu, Ke Ding, Shuai Chen, Jinwen Wang, Chaoqiang Wang, Jing Pan, Xiujuan Zhang, Jiansheng Jie
Summary: A novel organic-inorganic hybrid optical up-conversion (OUC) imaging device is developed by stacking a phosphorescent organic light-emitting diode (OLED) with a NiSix/Si Schottky barrier diode (SBD). The device utilizes pyramidal microstructures of silicon to greatly enhance light absorption, enabling it to respond to broadband SWIR light beyond the bandgap limit of silicon. The device demonstrates excellent up-conversion imaging behaviors at SWIR light with an ultra-fast refresh rate of over 3000 Hz and a high-resolution imaging capability of 508 ppi. This work paves the way for the fabrication of high-performance, low-cost silicon-based OUC devices for SWIR imaging applications.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Haoyu Jiang, Zhengjun Lu, Wei Deng, Fengquan Qiu, Yujian Zhang, Jialin Shi, Jiansheng Jie, Xiujuan Zhang
Summary: This paper presents a lateral homoepitaxy growth method that is compatible with scalable solution printing techniques, enabling the fabrication of centimeter-scale organic semiconductor single crystal arrays. The approach achieves high-uniformity morphology and low trap carrier density, leading to significantly improved organic field-effect transistor performance.
ACS MATERIALS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Mengjiao Dong, Liyun Liao, Chensheng Li, Yingxiao Mu, Yanping Huo, Zhong-Min Su, Fushun Liang
Summary: This study investigates the influence of the polarity of polymer matrices on persistent room-temperature phosphorescence (pRTP). It is discovered that intense phosphorescence emission can be achieved in highly polar matrices such as polyacrylic acid (PAA). The dipole-dipole interaction between the polar fluorophore and polar matrix is proposed to stabilize the excited state and facilitate the generation of efficient room-temperature phosphorescence emissions.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Han-Jiang Yang, Weijia Xiang, Xiangzhou Zhang, Jin-Yun Wang, Liang-Jin Xu, Zhong-Ning Chen
Summary: This article reports a 2D copper(I)-based cluster material for X-ray imaging, which exhibits ultra-high spatial resolution, high photoluminescence efficiency, and low detection limit. The material shows excellent linear response to X-ray dose rates and light output, and has the best spatial resolution among reported lead-free metal halide hybrids.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Review
Materials Science, Multidisciplinary
Taek Joon Kim, Sang-hun Lee, Dayeong Kwon, Jinsoo Joo
Summary: Donor-acceptor heterostructures using organic-inorganic halide perovskites, two-dimensional transition metal dichalcogenides, pi-conjugated organic small/macro molecules, and quantum dots are promising platforms for exciton-based photonics and optoelectronics. Hetero-interlayer excitons and hetero-intermolecular excitons formed through optical and/or electrical charge transfer in various heterostructures are important quasi-particles for light emission, detection, and harvesting systems.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Liemao Cao, Xiaohui Deng, Zhen-kun Tang, Rui Tan, Yee Sin Ang
Summary: We investigate the interface properties between WSi2N4 and Mo2B, O-modified Mo2B, and OH-modified Mo2B nanosheets. We find that WSi2N4 and Mo2B form n-type Schottky contacts, while functionalizing Mo2B with O and OH leads to the formation of both n-type and p-type ohmic contacts with WSi2N4. Additionally, we demonstrate the emergence of quasi-ohmic contact with ultralow lateral Schottky barrier and zero vertical interfacial tunneling barriers in Mo2B(OH)2-contacted WSi2N4.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Ga Eun Kim, Hae-Jin Kim, Heesuk Jung, Minwoo Park
Summary: This study presents a solution to the commercialization challenges of flexible LEDs based on MAPbBr(3) by incorporating polyurethane and an In-Ga-Zn-Sn liquid alloy. The designed devices showed high flexibility, efficiency, and durability, with improved electron injection and reduced defects, making them promising for next-generation displays.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Tao Shen, Zeng Wu, Zhen Jiang, Dongsheng Yan, Yan Zhao, Yang Wang, Yunqi Liu
Summary: Sidechain engineering is an important molecular design strategy for tuning the solid-state packing and structural ordering of conjugated polymers. The effects of sidechain direction on the optoelectronic properties of polymers and device performance were systematically investigated in this study. The results demonstrate that tuning the sidechain substitution direction can effectively improve the molecular structure and light absorption properties of polymers, providing new insights for the rational design of functional polymers.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Lotte Clinckemalie, Bapi Pradhan, Roel Vanden Brande, Heng Zhang, Jonathan Vandenwijngaerden, Rafikul Ali Saha, Giacomo Romolini, Li Sun, Dirk Vandenbroucke, Mischa Bonn, Hai I. Wang, Elke Debroye
Summary: In this study, a facile strategy using a non-conductive polymer was proposed to fabricate stable, pinhole-free thick films. The effect of introducing a second phase into CsPbBr3 perovskite crystals on their photophysical properties and charge transport was investigated. The dual phase devices exhibited improved stability and more effective operation at higher voltages in X-ray detection.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Jingye Zou, Shenglan Hao, Pascale Gemeiner, Nicolas Guiblin, Omar Ibder, Brahim Dkhil, Charles Paillard
Summary: When rare-earth ions are embedded in a ferroelectric material, their photoluminescence can serve as an all-optical probe for temperature, electric field, and mechanical stimulus. However, the impact of ferroelectric phase transitions on photoluminescence is not well understood. In this study, we demonstrate changes in the photoluminescence of green emission bands during critical ferroelectric transitions in an Er-doped BaTiO3 material. We also find that the intensity ratio and wavelength position difference of sub-peaks provide information on the phase transitions.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Jiangchao Han, Daming Zhou, Wei Yang, Chen Lv, Xinhe Wang, Guodong Wei, Weisheng Zhao, Xiaoyang Lin, Shengbo Sang
Summary: Rare type-II spin-gapless semiconductors (SGSs) have attracted increasing attention due to their unique spin properties. In this study, the interface contacts and spin transport properties of different devices composed of VSi2P4 ferromagnetic layers were investigated. The results show that VSi2P4 is a promising material for designing vertical van der Waals heterostructures with a giant tunnel magnetoresistance (TMR) in spintronic applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Tianqi Zhao, Renagul Abdurahman, Qianting Yang, Ruxiangul Aiwaili, Xue-Bo Yin
Summary: In this study, we designed and prepared Cr and Ba-doped gamma-Ga2O3 nanoparticles to achieve near-infrared emission and enhance the emission intensity. The emission mechanism was proposed based on the trap depth, band gap, and energy levels of Cr ions. The ratiometric temperature sensing and encryption information transfer demonstrated the potential applications of this technology.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Shuvankar Gupta, Jyotirmoy Sau, Manoranjan Kumar, Chandan Mazumdar
Summary: In this study, a new spin-gapless semiconductor material CoFeMnSn is reported, and its stable structure and spin-polarized band structure are determined through experimental realization and theoretical calculations. The compound exhibits a high ferromagnetic transition temperature, making it excellent for room temperature applications. The nearly temperature-independent resistivity, conductivity, and carrier concentration of the compound, adherence to the Slater-Pauling rule, and the high intrinsic anomalous Hall conductivity achieved through hole doping further confirm its spin-gapless semiconductor nature. Additionally, the compound's SGS and topological properties make it suitable for spintronics and magneto-electronics devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Ikumi Aratani, Yoji Horii, Yoshinori Kotani, Hitoshi Osawa, Hajime Tanida, Toshiaki Ina, Takeshi Watanabe, Yohko F. Yano, Akane Mizoguchi, Daisuke Takajo, Takashi Kajiwara
Summary: In this study, two-dimensional arrays of single-molecule magnets (SMMs) based on metal-organic frameworks (MOFs) were systematically modified through Langmuir-Blodgett methods and chemical modifications. The introduction of bulky alkoxide groups induced structural changes and perpendicular magnetic anisotropy. This research provides a promising strategy for the construction of high-density magnetic memory devices using molecular spintronics.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Zonghao Lei, Houhe Dong, Lijie Sun, Bing Teng, Yanfei Zou, Degao Zhong
Summary: Researchers have successfully developed four different up-conversion phosphors based on the Eulytite-type host Ba3Yb(PO4)(3). The optical temperature sensing properties of these phosphors were thoroughly investigated, and it was found that Ba3Yb(PO4)(3):Tm/Er/Ho showed potential for optical temperature measurement applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
C. Roncero-Barrero, M. A. Carvajal, J. Ribas-Arino, I. de P. R. Moreira, M. Deumal
Summary: This study computationally investigates the conductivity of four isostructural compounds with different Se contents, and reveals the parameters that define their conductivity in stable organic radical materials. The results provide insights into the influence of Se content on the conductivity and highlight the importance of considering multiple parameters in understanding the trends in conductivity.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Remi Arras, Kedar Sharma, Lionel Calmels
Summary: In this study, we investigated the interplay between structural defects in NiFe2O4, showing that the complex formed by a Ni-Oh/Fe-Td-cation swap and a neutral oxygen vacancy is more stable than these two isolated defects, and significantly reduces the width of the minority-spin band gap.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)