Article
Nanoscience & Nanotechnology
V. Naresh, S. Singh, H. Soh, J. Lee, N. Lee
Summary: This study reports the synthesis of a highly luminescent and stable dual-phase CsPbBr3-CsPb2Br5 perovskite nanocrystal (PNCs) system for scintillation application. The CsPb2Br5 phase developed on the surface of CsPbBr3 enhances the stability and luminescence properties of the nanocrystals. The dual-phase PNCs show strong green emission and excellent linear response under X-ray irradiation, making them promising for X-ray imaging in medical and industrial applications.
MATERIALS TODAY NANO
(2023)
Article
Nanoscience & Nanotechnology
Lan Ding, Burenbayaer Borjigin, Yuning Li, Xiaoxue Yang, Xiaojing Wang, Huiqin Li
Summary: The study developed a novel perovskite-based catalyst for CO2 photoconversion by growing CsPbBr3 quantum dots on CsPb2Br5 nanosheets in situ, resulting in a dual-phase composite with outstanding activity and stability. The close contact between the two components enabled rapid transfer of photo-generated electrons and enhanced CO2 photoconversion activity.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Yunpeng Wang, Fei Wang, Gangbei Zhu, Quan Quan, Zhengxun Lai, You Meng, Yi Fan, SenPo Yip, Dongxu Zhao, Johnny C. Ho
Summary: CsPb2Br5/CsPbBr3 composite systems have attracted significant attention due to their enhanced photoluminescence intensity and moisture stability. However, the luminescence mechanism of CsPb2Br5-based materials remains controversial. In this work, high-quality CsPb2Br5 crystals were prepared to investigate their luminescent mechanisms. The results indicate that the green emission comes from CsPbBr3 attached and grown on CsPb2Br5 crystals. Ultrafast transient absorption measurements further reveal the dominance of intersystem crossing in the electron transfer process due to phonon scattering-assisted hopping at interfacial states. These findings provide insights into the luminescence of CsPb2Br5 materials and pave the way for designing and enhancing the fluorescence of materials for technological applications.
Article
Materials Science, Multidisciplinary
Min Yang, Yujia Yan, Enzhou Liu, Qian Sun, Jun Fan
Summary: In recent years, the application of Cs(n)PbBr(2)thornn perovskite with excellent stability in chemical sensing has not been developed. This study successfully prepared Cs4PbBr6/CsPbBr3 with good stability and demonstrated its potential as a fluorescent sensor for detecting hydrazine substances. The method based on Cs4PbBr6/CsPbBr3 exhibited concentration-dependent fluorescence intensity and a good linear model for detecting 2, 4-dinitriphenylhydrazine (DNPH) was established. The detection limit was found to be 0.033 mg/L.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Chemistry, Analytical
Ruifen Sun, Xiumin Yu, Jie Chen, Weiwei Zhang, Yun Huang, Jingcheng Zheng, Yuwu Chi
Summary: In this study, highly electrochemiluminescent perovskite quantum dots (PQDs) were synthesized by optimizing the synthesis conditions. The volume of the precursor solution, concentrations of CsBr and PbBr2, amount of capping reagents, and synthesis reaction temperature were found to significantly affect the ECL activity of PQDs. The new PQDs, characterized as hybrids of 3D PQDs and 0D PQDs with unique morphologies, exhibited much higher ECL activity compared to prevailing 3D PQDs. These novel PQDs were successfully applied for the ECL sensing of bisphenol A, showing promising potential in analytical chemistry.
ANALYTICAL CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Doudou Qian, Tiangui Hu, Jingyi Gao, Haihong Du, Li Wu, Yongfa Kong, Yi Zhang, Jingjun Xu
Summary: In this study, the luminous performance of CsPbBr3 powder is significantly improved using a simple mechanosynthesis strategy, making it a promising material for optoelectronic devices.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Chemistry, Multidisciplinary
Huafeng Ding, Yansu Shan, Jizhou Wang, Qinfeng Xu, Jing Han, Mengmeng Jiao, Kunjian Cao, Mingliang Liu, Haifeng Mu, Shufang Zhang, Chuanlu Yang
Summary: This study investigates the photoluminescence mechanism of CsPbBr3/Cs4PbBr6 core/shell nanoparticles at the single-particle level. By analyzing photoluminescence intensity trajectories and photon antibunching measurements, the emission characteristics of individual CsPbBr3/Cs4PbBr6 core/shell NCs are found to differ from Cs4PbBr6 NCs, providing insights into the origin of their emission.
Article
Chemistry, Multidisciplinary
Rong Song, Ying Li, Jun Qian
Summary: In this study, composite perovskite quantum dots with high photoluminescence quantum yield and storage stability were prepared using a room temperature ligand-assisted precipitation method. By adjusting the composition and ratio of the resin components, inks suitable for screen printing were developed. The printed perovskite films exhibited high coverage and outstanding optical properties.
JOURNAL OF NANOPARTICLE RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Jingjing Cao, Xiankan Zeng, Wen Li, Liang Lv, Cheng Yan, Haichao Huang, Jun Lu, Weiqing Yang
Summary: A water-induced construction of Cs4PbBr6/CsPbBr3 heterojunctions was achieved by adding trace water with strong polarity, which exhibited higher exciton binding energy and lower nonradiative decay rate constant compared to single CsPbBr3 nanocrystals. This work provides an important way for constructing Cs4PbBr6/CsPbBr3 heterojunctions and promotes the commercial development of heterojunction-like optoelectronics.
APPLIED MATERIALS TODAY
(2023)
Article
Optics
Wenchao Liang, Ting Li, Chunchun Zhu, Liandong Guo
Summary: Emissive Cs4PbBr6/CsPbBr3 perovskite composites with green emission have been synthesized by a simple method, and the green emission is attributed to both the composite and energy transfer. The composites show excellent stability after 60 days of storage in ambient environment.
Article
Optics
Cigdem Tuc Altaf, Nazrin Abdullayeva, Mehmet Sankir, Nurdan Demirci Sankir
Summary: This study presents a seeding-layer free synthesis method for nanostructured three-dimensional zinc oxide thin films and their sensitization with inorganic perovskite halide semiconductors to enhance emission abilities. The transformation of CsPbBr3 nanocrystals into a composite structure resulted in a significant increase in luminescence. Improved electron transfer was observed for ZnO thin films deposited with Cs4PbBr6-CsPbBr3.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Multidisciplinary
Sa-Rang Bae, Myeong Jin Seol, Soo Young Kim
Summary: This article demonstrates the fabrication of perovskite thin film through vacuum deposition and its application in LED devices. With the optimization of dopant ratio, the efficiency and characteristics of the device are significantly improved. The research results are expected to contribute to the future development of perovskite LED research.
Article
Materials Science, Multidisciplinary
Manli Zhang, Yao Li, Kaimin Du, Xuan Gao, Yu Lu, Ding Wen, Shuang Yao, Jing Feng, Hongjie Zhang
Summary: This study successfully converted CsPbBr3 into monodisperse Cs4PbBr6/CsPbBr3@Ta2O5 core-shell microcrystals with better light and thermal stability, resulting in significant improvements in photoluminescence quantum yield and photoluminescence lifetime. Moreover, the luminous efficiency of the WLED device based on Cs4PbBr6/CsPbBr3@Ta2O5 was found to be twice that of the device fabricated using Cs4PbBr6/CsPbBr3.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Jingwei Zhu, Benlin He, Xinpeng Yao, Haiyan Chen, Yanyan Duan, Jialong Duan, Qunwei Tang
Summary: Precise phase control of Cs-Pb-Br derivatives and utilizing 2D transition metal dichalcogenide ReSe2 for interfacial charge extraction are effective strategies to enhance the photovoltaic performance of CsPbBr3 perovskite solar cells. This work provides a deep understanding of the phase control and the impact of derivatives on the photovoltaic performance of advanced CsPbBr3 PSCs.
Article
Engineering, Environmental
Zong-Tao Li, Bo-Jia Li, Jia-Sheng Li, Cun-Jiang Song, Xin-Rui Ding, Hai-Long Yuan, Bin-Hai Yu, Yong Tang, Jian-Zhen Ou, Romain Gautier, Hong -Lei Ji, Hao-Chung Kuo
Summary: This study successfully improved the photoluminescence energy outcoupling of CsPbBr3/Cs4PbBr6 perovskite phosphor by utilizing a nano-porous matrix. By optimizing the nanopore-packing perovskite particles structure, an enhanced photoluminescence intensity was achieved. The study provides a general guide for efficient perovskite phosphors utilizing the nano-porous matrix to enable the internal resonant scattering effect.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Materials Science, Multidisciplinary
Teng Zhang, Mingkai Li, Jian Chen, Yang Wang, Liangshuang Miao, Yinmei Lu, Yunbin He
Summary: This review summarizes recent advances in the experimental and theoretical studies on bandgap engineering of Zinc Oxide (ZnO) through the formation of multi-component alloys, and discusses the development of related hetero-structures and optoelectronic devices. Efforts have been made to engineer the band structure of ZnO by substituting cations or anions, resulting in the desired material properties. Additionally, progress has been made in the development of ZnO alloy-based hetero-structures, which show potential for the development of optoelectronic devices.
MATERIALS SCIENCE & ENGINEERING R-REPORTS
(2022)
Article
Physics, Applied
Qiulin Qu, Qi Liu, Lufeng Chen, Yingxiang Li, Hang Pan, Jian Chen, Mingkai Li, Yinmei Lu, Yunbin He
Summary: In this study, amorphous Tm-Ga2O3 films were grown on flexible mica substrates for the development of photodetectors with broadened bandgap and lessened oxygen vacancies. These amorphous films exhibited high performance with low dark current and fast response speed, and maintained good performance after multiple bending cycles. This research sheds light on the potential of flexible devices based on amorphous Tm-Ga2O3 for solar-blind DUV detection.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Wenyu Fang, Xinglin Xiao, Haoran Wei, Yue Chen, Mingkai Li, Yunbin He
Summary: This study proposes three new kinds of 2D monolayer oxides, namely CrO2, MoO2, and WO2. The results of density functional theory (DFT) calculations show that these monolayer oxides exhibit high mechanical and dynamic stability, semiconducting properties, and high thermal conductivity. These properties suggest their potential applications in optoelectronic devices and thermal conductive components.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Bohan Liu, Mingkai Li, Wang Fu, Pan Ye, E. Wentao, Xinglin Xiao, Haoran Wei, Yinmei Lu
Summary: In this study, a p-SnO2:Mg/n-SnO2 homojunction-based ultraviolet photodetector was successfully fabricated, demonstrating excellent performance such as high rectifying ratio, ultra-fast response speed, and high photocurrent, responsivity, and detectivity.
Article
Chemistry, Physical
Wenyu Fang, Kuan Kuang, Xinglin Xiao, Haoran Wei, Yue Chen, Mingkai Li, Yunbin He
Summary: Two-dimensional materials, MgAl2Se4 and MgIn2Se4, possess low thermal conductivity and high electrical properties, showing potential applications in nanoelectronics and thermoelectric devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Yingxiang Li, Zebin Zhou, Hang Pan, Jian Chen, Yuchao Wang, Qiulin Qu, Dongjiu Zhang, Mingkai Li, Yinmei Lu, Yunbin He
Summary: A self-driven solar-blind ultraviolet photodetector (SBUVPD) was developed by depositing a b-Ga2O3 thin film on a commercially available fluorine doped tin oxide (FTO) substrate using pulsed laser deposition, with multi-layer graphene (MLG) as the top electrode. The introduction of MLG significantly enhanced the photocurrent and responsivity of the photodetector. The device exhibited excellent detection performance, delivering a high photocurrent of 31 nA towards 250 nm-light with an ultra-fast response speed and a maximum responsivity of 9.2 mA/W.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Zhiqiang Liu, Kuan Kuang, Wenyu Fang, Xinglin Xiao, Haoran Wei, Yue Chen, Mingkai Li, Yunbin He
Summary: In this study, we investigated the structure, mechanical properties, electronic and phonon transport preferences of Janus monolayer LiZnX (X = N, P, As) using density functional theory. The results showed that these monolayers exhibit high electron and hole mobilities, as well as promising thermoelectric properties, making them potential candidates for applications in thermoelectric and microelectronic devices.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Shuang Yan, Gaochen Yang, Huanfeng He, Qi Liu, Qingqi Peng, Jian Chen, Mingkai Li, Yinmei Lu, Yunbin He
Summary: In this study, Hf0.5Zr0.5O2/beta-Ga2O3 heterojunction-based self-driven solar-blind UV photodetectors were constructed by combining ferroelectric Hf0.5Zr0.5O2 material with Ga2O3. The optimized device with a HfZrO2 layer thickness of 10 nm showed remarkable responsivity and detectivity, outperforming single Ga2O3-based devices. The device's performance could be adjusted by varying the poling states of HfZrO2 and showed significant enhancement in the upward poling state.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Energy & Fuels
Jing Yang, Chuwu Xing, Qinhui Bao, Le Zhang, Shuai Huang, Duofa Wang, Tianjin Zhang
Summary: This study presents an interface engineering that reinforces the operation stability of FACsPbI(3) perovskite solar cells (PSCs) by introducing a multifunctional ligand CEPPA modification layer. CEPPA passivates oxygen vacancy defects and reduces defect states on SnO2 films. Additionally, optimized energy level arrangement leads to better electron extraction and transport. The power conversion efficiency (PCE) of the FACsPbI(3) device increases from 16.33% to 17.78% and the CEPPA-modified SnO2 shows better phase and moisture stability.
Article
Chemistry, Multidisciplinary
Miao He, Xinyu Xu, Le Zhang, Fei Lu, Chuwu Xing, Duofa Wang, Tianjin Zhang
Summary: Perovskite solar cells have shown significant improvements in power conversion efficiency, with even higher efficiencies possible. This study examines the impact of introducing the organic molecule dibenzo-18-crown-6 (DC) to CsPbI2Br perovskite precursor solution on the phase, morphology, and optical properties of perovskite films. Experimental results reveal that the efficiency of the photovoltaic device gradually increases with the increase of DC concentration, reaching its highest efficiency of 11.57% at a concentration of 0.3%. The presence of DC molecules effectively controls the perovskite crystallization process.
Article
Materials Science, Ceramics
Jian Chen, Jiaxing Mao, Zihui Wang, Yanhui Dong, Jinming Guo, Mingkai Li, Yi Zhang, Yinmei Lu, Yunbin He
Summary: In this work, lead-free ceramics with narrow bandgaps and large remanent polarization are obtained via Fe2O3 doping. The optimized ceramic possesses a narrow bandgap of 1.74 eV and a large remanent polarization of 27.05 muC/cm2. Furthermore, a switchable photovoltaic effect is observed in the ceramic-based device.
JOURNAL OF ADVANCED CERAMICS
(2023)
Article
Physics, Applied
Hao Lu, Lei Li, Zhiwu Tang, Maji Xu, Yonghui Zheng, Martin Becker, Yinmei Lu, Mingkai Li, Pai Li, Zaoli Zhang, Peter J. J. Klar, Yunbin He
Summary: We explore the possibility of tuning the metal-to-insulator transition (MIT) of crystalline VO2 thin films by strain engineering. Thin VO2 films on TiO2 (110) substrates are almost fully strained up to thicknesses of about 20 nm and exhibit tensile strain along the c axis of the (high-temperature) metallic rutile phase leading to an increase in the MIT temperature by as much as 30 & DEG;C in comparison to the almost fully relaxed 300 nm-thick VO2 film. The strain gradient within the thicker samples leads to a continuous serial switching of layered regions of the VO2 film from the insulating to the metallic state with increasing temperature.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Yue Chen, Wenyu Fang, Fengxin Liu, Kuan Kuang, Xinglin Xiao, Haoran Wei, Mingkai Li, Yunbin He
Summary: Based on first-principles calculations, the properties and characteristics of Au contacts on different SnO2 interfaces were investigated. The Schottky barrier height (SBH) was found to strongly depend on the interface structure and the presence of oxygen vacancies (VO) in the SnO2 layer. Additionally, doping with low-valence elements can alter the contact properties. The modulation effect of SBH is mainly caused by the rearrangement of interfacial potentials and results in different SBH values.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Pan Huang, Lufeng Chen, Daotian Shi, Qi Liu, Jian Chen, Mingkai Li, Yinmei Lu, Jinming Guo, Yunbin He
Summary: In this study, high-quality beta-Ga2O3 thin films were heteroepitaxially grown on MgO(100) substrates using pulsed laser deposition, and highly-sensitive solar-blind ultraviolet photodetectors were achieved. The beta-Ga2O3 films were single-phase, (100)-oriented, and atomically-smooth with unique columnar nanodomains of 8-12 nm width.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Junnian Chen, Xingfu Xiao, Yue Chen, Mingkai Li, Wenyu Fang, Zixian Yu, Biqi He, Tianyou Zhai, Yunbin He
Summary: This study reports a method of modulating the structural distortion by steric hindrance effects to change the morphology of bismuth bromide chains. By interacting with bismuth bromide, N,N,N & PRIME;,N & PRIME;-tetramethyl-1,4-phenylenediammonium (TMPD)(2+) is used to template regular BiBr5 chains, resulting in a narrow-bandgap mixed 0D/1D (TMPD)(2)(Bi2Br10H2O)-H-. This finding offers new insights into developing narrow-bandgap perovskite hydrates for practical optoelectronic applications.
ADVANCED OPTICAL MATERIALS
(2023)