Article
Chemistry, Physical
Yushuang Fu, Xinlin Liu, Cailing Liu, Yiguo Xu, Ayesha Khan Tareen, Karim Khan, Swelm Wageh, Omar A. Al-Hartomy, Abdullah G. Al-Sehemi, Han Zhang, Ye Zhang
Summary: In this study, a mixed-dimensional heterojunction of 0D Bismuth nanoparticles (Bi NPs) coated 2D Borophene (B@Bi) was prepared by a hydrothermal method. The resulting B@Bi-based photodetector (PD) exhibited enhanced self-powered photodetection properties, fast response and recovery speed, and repeatable ON/OFF switch signals after 30 days. This work provides an opportunity for fabricating high-performance mixed-dimensional B@Bi-based PDs with good long-term stability.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Yurong Jiang, Ruiqi Wang, Xueping Li, Zinan Ma, Lin Li, Jian Su, Yong Yan, Xiaohui Song, Congxin Xia
Summary: This study demonstrates an efficient method to optimize the photoelectric performance of vdWH by introducing the photovoltaic field effect. The proposed photodiode based on double vdWHs shows a high responsivity of 715 mA.W-1 and fast response time of 45 mu s, indicating excellent self-powered ability.
Article
Chemistry, Multidisciplinary
Weidong Song, Jiaxin Chen, Ziliang Li, Xiaosheng Fang
Summary: A self-powered, high-performance Ti3C2Tx MXene/GaN van der Waals heterojunction-based ultraviolet photodiode with outstanding quantum efficiency and rapid response speed is reported, showing remarkable photovoltaic behavior and power conversion efficiency.
ADVANCED MATERIALS
(2021)
Article
Instruments & Instrumentation
Kaixuan Zhang, Dong Wang, Huaizhong Xing, Xiaoshuang Chen, Xiaoyong He, Lin Wang
Summary: This study demonstrates a self-driven and ultra-sensitive room temperature terahertz (THz) photodetector based on an asymmetrically contacted graphene-Ta2NiSe5 van der Waals heterojunction. The detector exhibits an ultra-fast photoresponse, high responsivity, and low noise equivalent power at specific THz frequencies. Moreover, the detector achieves high-resolution THz imaging at room temperature and performs significantly better with a small bias voltage. These results present the feasibility of superior room temperature THz detection and have promising prospects in analytical applications, ultrafast sensing, and security monitoring.
INFRARED PHYSICS & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Jinping Chen, Zhen Zhang, Yi Ma, Jiying Feng, Xiaoyu Xie, Xiaoxuan Wang, Aoqun Jian, Yuanzheng Li, Zhuxin Li, Heng Guo, Yizhi Zhu, Qiannan Cui, Zengliang Shi, Chunxiang Xu
Summary: A WS2/InSe van der Waals heterostructure (vdWH) photodiode was fabricated by stacking InSe and WS2 flakes using an all-dry transfer method. The heterostructure exhibited excellent photovoltaic behavior with a large open voltage, short-circuit current, fast response time, high light on/off ratio, high responsivity, and broadband photoresponse. This study provides a strategy for developing high-performance self-powered broadband photodetectors based on 2D materials.
Article
Chemistry, Physical
Jinping Chen, Zhen Zhang, Yi Ma, Jiying Feng, Xiaoyu Xie, Xiaoxuan Wang, Aoqun Jian, Yuanzheng Li, Zhuxin Li, Heng Guo, Yizhi Zhu, Qiannan Cui, Zengliang Shi, Chunxiang Xu
Summary: This study presents a WS2/InSe vdWH photodiode based on 2D materials, which exhibits excellent photovoltaic behavior and broadband photoresponse due to the precise stacking and energy-band alignment.
Article
Materials Science, Multidisciplinary
Naveen Kumar, Muhammad Kumail, Junghyun Lee, Hyeong Gi Park, Joondong Kim
Summary: In this study, a self-powered transparent photodetector consisting of a vdW semiconductor (SnS) and a wide-bandgap oxide (Ga2O3) thin film was successfully fabricated. The device is highly transparent with an average visible transmittance of 45%. Under illumination, the self-biased transparent photodetector exhibits photovoltaic behavior, with a significant open circuit voltage of 496 mV and a considerably high short-circuit current density of 1.7 mA/cm^2. The device shows a significant photoresponse from UV (340 nm) to NIR (850 nm) illumination, with a remarkable responsivity of 210.4 mA/W and the fastest response time of approximately 8 ms, making it a self-operated broadband transparent photodetector.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Physics, Multidisciplinary
Yancai Xu, Rong Zhou, Qin Yin, Jiao Li, Guoxiang Si, Hongbin Zhang
Summary: An organic/inorganic hybrid van der Waals heterostructure with an atomically abrupt interface was prepared in this study, and a self-powered photodetector was constructed based on this hybrid heterojunction. The photodetector showed excellent performance with high on/off current ratio, maximum photocurrent, responsivity, detectivity, and fast response time. The designed heterojunction photodetector has promising applications in the field of multifunctional optoelectronics.
Article
Chemistry, Multidisciplinary
Yafei Yan, Minxin Li, Kai Xia, Kemeng Yang, Dun Wu, Liang Li, Guangtao Fei, Wei Gan
Summary: Researchers fabricated a van der Waals heterostructure (vdWH) photodetector composed of rhenium disulfide (ReS2) and tellurium (Te), which exhibited a sensitive and broadband photoresponse with high on/off ratios. The photodetector achieved high responsivity and specific detectivity, as well as a fast photoresponse speed. Additionally, it showed a photovoltaic effect and could be used as a self-powered photodetector (SPPD).
Article
Nanoscience & Nanotechnology
Guanghui Wang, Bin Han, Chun Hong Mak, Jialong Liu, Bo Liu, Peng Liu, Xiaodong Hao, Hongyue Wang, Shufang Ma, Bingshe Xu, Hsien-Yi Hsu
Summary: This study demonstrates a photodetector with a mixed-dimensional van der Waals heterostructure of hBN/Gr/1D CH3NH3PbI3, which shows improved carrier extraction, excellent responsivity, and specific detectivity. The device also exhibits high stability when exposed to air due to the atomic encapsulation of hBN.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Naveen Kumar, Malkeshkumar Patel, Donggun Lim, Kibum Lee, Joondong Kim
Summary: Van der Waals and wide bandgap materials play a crucial role in the development of solar energy-activated photoelectric devices and power electronics. This study presents a novel heterojunction of van der Waal and wide bandgap materials for transparent photovoltaics (TPV), which exhibits high optical transparency and impressive photoelectric performance.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Huiming Shang, Yunxia Hu, Feng Gao, Mingjin Dai, Shichao Zhang, Shuai Wang, Decai Ouyang, Xinyu Li, Xin Song, Bo Gao, Tianyou Zhai, PingAn Hu
Summary: This study presents a high-gain photodetector based on a vertical InSe/GaSe heterojunction. By inducing carrier recirculation, the device achieves improved optoelectronic performance and sensitivity. The heterojunction also exhibits the ability to detect weaker light, highlighting its potential for various applications.
Article
Physics, Applied
Deqi Kong, Tingting Lin, Jixing Chai, Zihe Zhu, Peixin Liu, Zhengliang Lin, Tingjun Lin, Linhao Li, Liang Chen, Guoqiang Li, Wenliang Wang
Summary: A self-powered and high-performance MXene/InGaN van der Waals heterojunction visible light mini-photodetector is reported. The MXene and InGaN combination creates a Schottky junction, effectively separating the photoinduced electron/hole pairs and improving carrier mobility and lifetime. The mini-PD exhibits high responsivity, specific detection rate, and fast response time, making it suitable for high-speed visible light communication applications.
APPLIED PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Gang Wu, Hee-Suk Chung, Tae-Sung Bae, Jiung Cho, Kuo-Chih Lee, Hung Hsiang Cheng, Cormac O. Coileain, Kuan-Ming Hung, Ching-Ray Chang, Han-Chun Wu
Summary: This work presents the design and fabrication of band-aligned van der Waals-contacted photodetectors with atomically sharp and flat metal-semiconductor interfaces through transferred metal integration, achieving superior performance compared to traditional devices. The devices exhibit efficient suppression of charge recombination, resulting in high responsivity, detectivity, and polarization sensitivity ratio at zero bias, along with fast response speed and polarization-sensitive performance.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Lingxian Kong, Guangliang Li, Qi Su, Xianhua Tan, Xuning Zhang, Zhiyong Liu, Guanglan Liao, Bo Sun, Tielin Shi
Summary: This study demonstrates the use of a MoTe2/MoS2 2D heterojunction to improve the performance of photodetectors and achieve polarization-sensitive, self-powered, and broadband photodetection and imaging. The device has a self-powered photoresponse ranging from 520 to 1550 nm due to the built-in electric field of the heterojunction. Under 915 nm light illumination, the device shows outstanding performance, including high responsivity, specific detectivity, fast rise/decay time, and high on/off ratio. The polarization imaging capabilities of the device in scattering surroundings are also demonstrated, with significant contrast enhancement compared to S-0. This work opens up new avenues for developing high-performance polarization-sensitive photodetection and next-generation polarized imaging using anisotropic semimetals heterojunction photodetectors.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Qing Liu, Yu Qing Yang, Xingfu Wang, Weidong Song, Xingjun Luo, Jiaqi Guo, Jiang Shi, Chuan Cheng, Dongyang Li, Longfei He, Kai Li, Fangliang Gao, Shuti Li
Summary: The study demonstrates a hybrid heterostructure photodetector combining GaN microwire array and perovskite, showing superior photoelectric performance in a wide detection range from ultraviolet to visible light. This is attributed to effective separation of photogenerated carriers at the hetero-interface and directional transfer of carriers within the GaN microwire array, shedding light on fabricating high-performance heterostructure photodetectors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Wenhai Wu, Zhao Chen, Yunfeng Zhan, Bochen Liu, Weidong Song, Yue Guo, Ji Yan, Xiaolong Yang, Zhi Zhou, Wai-Yeung Wong
Summary: The study successfully developed an efficient polymer named CNPr-TFB by adding a relatively weak electron-withdrawing group to traditional hole transporting polymers. This new polymer shows superior performance in QLEDs, including higher conductivity and stabilized HOMO, leading to enhanced external quantum efficiencies and longer operation lifetimes compared to devices using commonly used materials.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Yue Guo, Weidong Song, Qing Liu, Yiming Sun, Zhao Chen, Xin He, Qingguang Zeng, Xingjun Luo, Ruiqing Zhang, Shuti Li
Summary: A filter-free, ultra-narrowband, ultraviolet photodetector based on a porous GaN/MoO3 heterojunction is demonstrated. The optimized porous GaN/MoO3 photodetector exhibits ultra-narrowband ultraviolet photoresponse and a large light-to-dark current ratio, making it promising for optical communication systems.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Zirong Wang, Fanyuan Meng, Qi Feng, Shengxuan Shi, Langwen Qiu, Guanwei Sun, Zhao Chen, Qingguang Zeng, Weiguo Zhu, Shi-Jian Su
Summary: In this study, efficient green perovskite light-emitting diodes (PeLEDs) were fabricated by optimizing the phase composition and introducing mix-interlayer ligands. The introduction of these ligands greatly suppressed non-radiative recombination, resulting in high photoluminescence quantum yield and narrow emission bandwidth.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Bochen Liu, Yue Guo, Qiang Su, Yunfeng Zhan, Zhao Chen, Yang Li, Baogui You, Xiaonan Dong, Shuming Chen, Wai-Yeung Wong
Summary: A new strategy is developed to synthesize red, green, and blue quantum dots using CdZnS as the outermost shell. The inner ZnS and ZnSe shells confine the excitons inside the QD cores, while the CdZnS shell reduces the energy barrier for hole injection, resulting in high-performance QLEDs.
Article
Engineering, Environmental
Hongyang Zhang, Yingjie Sun, Zhao Chen, Weigao Wang, Qiwei Wang, Shuming Chen, Yuqing Xu, Wai-Yeung Wong
Summary: Solution processing of OLEDs is an attractive approach due to its low cost and accessibility to a variety of materials. This study focuses on the fabrication of high-performance deep red and NIR OLEDs using evaporation and solution processing methods. The devices achieved high maximum external quantum efficiencies and the effects of functional substituents and p-pi conjugation on the optoelectronic properties were investigated. This research provides new insights into developing efficient OLEDs based on Ir(III) complexes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Hongyang Zhang, Zhao Chen, Longzhi Zhu, Yongquan Wu, Yuqing Xu, Shuming Chen, Wai-Yeung Wong
Summary: Researchers have achieved high external quantum efficiency in near-infrared OLEDs by designing new near-infrared phosphorescent Ir(III) complexes. The introduction of a cyano unit and a conjugated group improves the position of the emission spectrum and the rate of radiative decay.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Zhao Chen, Naifan Tian, Peng Tao, Shuming Chen, Dongge Ma, Lixiang Wang, Wai-Yeung Wong
Summary: This study presents the fabrication of efficient deep blue phosphorescent organic light-emitting diodes (PHOLEDs) using an iridium(III) carbene phosphor and a tandem device architecture. The resulting PHOLEDs exhibit pure blue emission and high performance, attributed to the efficient and balanced recombination of charge carriers in the two emissive layers.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Engineering, Environmental
Xiaokun Fan, Zhen Mu, Zhao Chen, Yunfeng Zhan, Fanyuan Meng, Yang Li, Guichuan Xing, Wai-Yeung Wong
Summary: An alloyed quantum dot with a core/shell structure of Cd0.194Zn0.806Se0.406S0.594/ZnS was synthesized, which exhibited efficient green emission with high photoluminescence quantum yield (PL QY) and ultra-fast radiative transition rate. The quantum dot also showed potential for applications in light-emitting diodes (LEDs).
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Xiaolong Yang, Shipan Xu, Yan Zhang, Chengyun Zhu, Linsong Cui, Guijiang Zhou, Zhao Chen, Yuanhui Sun
Summary: This study reports two NIR phosphorescent Ir(III) complexes with emission peaks around 730 nm and narrow full width at half maximum of only 43 nm. Pure NIR luminescence can be obtained without a very long emission wavelength, thus overcoming the restriction of the energy gap law and achieving impressively high photoluminescence quantum yield up to 0.70. Moreover, pure NIR organic light-emitting diodes (OLEDs) fabricated by solution-processing method show outstanding device performance with the highest external quantum efficiency of 16.43%, setting a new record for solution-processed NIR-OLEDs based on different emitters.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Multidisciplinary
Yuanhui Sun, Chen Chen, Bochen Liu, Yue Guo, Zhao Feng, Guijiang Zhou, Zhao Chen, Xiaolong Yang
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Inorganic & Nuclear
Hongyang Zhang, Haitao Wang, Kevin Tanner, Adrien Schlachter, Zhao Chen, Pierre D. Harvey, Shuming Chen, Wai-Yeung Wong
Summary: A series of heteroleptic Ir(iii) complexes consisting of two cyclometalated C^N ligands and a dipyrrinato ligand as an ancillary ligand were synthesized and characterized. By introducing a fluorine atom, phenyl ring, or diphenylamino group into the C^N ligands while keeping the ancillary ligand unchanged, the emission bands of these Ir(iii) dipyrrinato phosphors did not show a significant shift, exhibiting emissions extending into the near-infrared region.
DALTON TRANSACTIONS
(2021)
Article
Materials Science, Multidisciplinary
Yue Guo, Bochen Liu, Zhao Chen, Weidong Song, Naifan Tian, Wenhai Wu, Xiaokun Fan, Yunfeng Zhan, Fanyuan Meng, Qingguang Zeng, Wai-Yeung Wong
Summary: Water is used as a passivation agent to fix the interface between quantum dots (QDs) and magnesium doped zinc oxide (ZnMgO) nanoparticles, which reduces exciton quenching and balances charge carriers to improve the performance of blue quantum dot light-emitting diodes (QLEDs). The passivated ZnMgO leads to significantly higher external quantum efficiency (EQE) and luminance in blue QLEDs compared to those made with pristine ZnMgO. Characterization techniques such as photoluminescence spectroscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy were used to analyze the water-passivated ZnMgO nanoparticles for further understanding of the enhanced performance in blue QLEDs.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Yuanhui Sun, Bochen Liu, Bo Jiao, Yue Guo, Xi Chen, Guijiang Zhou, Zhao Chen, Xiaolong Yang
Summary: This study reports two thermally stable dinuclear Pt(II) complexes that can generate pure yellow emissions in solution-processed OLEDs. These complexes have impressively high photoluminescence quantum efficiencies in doped films and improved solubility due to bulky substituents.
MATERIALS CHEMISTRY FRONTIERS
(2021)
