Article
Materials Science, Multidisciplinary
Beining Zheng, Zehan Wu, Feng Guo, Ran Ding, Jianfeng Mao, Maohai Xie, Shu Ping Lau, Jianhua Hao
Summary: The integration of tellurium (Te) and germanium (Ge) through molecular beam epitaxy (MBE) method led to the formation of a Te/Ge vertical heterojunction. The difference in work function between Te and Ge layer resulted in a built-in electric field that enhanced carrier separation, leading to excellent self-powered photovoltaic performance.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yanan Wei, Hao Chen, Tianhua Liu, Song Wang, Yihang Jiang, Yu Song, Jianqi Zhang, Xin Zhang, Guanghao Lu, Fei Huang, Zhixiang Wei, Hui Huang
Summary: Organic photodetectors (OPDs) for near infrared (NIR) light detection, constructed by the sequential deposition (SD) method, exhibit high detectivity, reduced dark currents, and superior performance compared to devices made by blend casting (BC) method. The vertical phase segregation structure of SD devices leads to a significantly lower dark current, resulting in improved D* values under different bias voltages.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Qixin Tang, Guiying Tan, Hong Zhang, Honglin Li, Yuanqiang Xiong, Di Pang, Lijuan Ye, Liang Fang, Chunyang Kong, Wanjun Li
Summary: This study demonstrates the exceptional efficacy of introducing gallium into ZnO nanowire to design high-performance PEC-type PDs. The obtained Ga-doped ZnO PEC-type photodetectors exhibit superior UV photo-response performance, fast response/recovery time, and improved generation, transfer, and separation of photoexcited charge carriers. Additionally, the feasibility of using ZnO:Ga nanowires as self-powered optical receivers is demonstrated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Materials Science, Multidisciplinary
Hong-Yi Hou, Shuo Tian, Jing-De Chen, Hong-Hui Ling, Hao Ren, Ye-Fan Zhang, Heng-Ru Ge, Wei-Shuo Chen, Yan-Qing Li, Hongying Mao, Hisao Ishii, Jian-Xin Tang
Summary: This research proposes a spectrally selective hole extraction structure (SHE) for high-efficiency solar-blind photodetectors. The structure enables narrowband absorption and optimized charge extraction in the solar-blind region, resulting in higher responsivity and detectivity for the device.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Chih-Yu Chang, Kuan-Si Wu, Chun-Ya Chang
Summary: High-performance and long-term stable self-powered photodetectors based on methylammonium lead iodide nanowires are demonstrated by incorporating a multi-functional interfacial layer DPP-CNTVT. The PDs exhibit a high responsivity, specific detectivity, and wide linear dynamic range, with nearly 90% of the initial detectivity secured after continuous operation for 15,300 hours in ambient conditions. This study provides valuable insights into developing efficient and ultra-stable self-powered perovskite PDs through interfacial engineering.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Environmental
Xiaoyu Zhou, Cheng Wang, Jilong Luo, Lichun Zhang, Fengzhou Zhao, Qingqing Ke
Summary: This study successfully grows nontoxic copper halide perovskite CsCu2I3 thin films and develops self-powered ultraviolet photodetectors with significant sensitivity and high on/off ratio. Under UV illumination, the responsivity and external quantum efficiency reach a high level.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Zewei Wu, Zemin Zhang, Mengdi Sun, Bing Tan, Bo Liu, Weihua Han, Erqing Xie, Yingtao Li
Summary: By depositing a functional overlayer of p-type CuBi2O4 on the surface of n-type Si to build a p-n heterojunction, a photodetector with ultralow dark current, high photosensitivity, strong self-powered characteristics, and fast response time can be created, which is suitable for optical communication systems. The top layer acts as a light-harvesting semiconductor to efficiently generate, separate, and transport photocarriers.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Chemistry, Physical
Yi Ren, Gang Li, Hua An, Son-grui Wei, Chen-yang Xing, Zheng-chun Peng
Summary: Research on 2D materials and their van der Waals heterostructures has attracted significant interest in electronics and optoelectronics. However, constructing these heterostructures remains a challenge, as the widely used stacking method lacks control over lattice orientation. In this study, a new SnS2/MXene Nb2C heterostructure was designed and prepared through an electrostatic assembly process, showing enhanced performance for high-performance photodetectors. The combination of Nb2C MXene nanosheets and SnS2 nanosheets improved charge transfer, carrier density, light adsorption, and reduced band bending and charge recombination. These SnS2/Nb2C photodetectors achieved remarkable responsivity and specific detectivity at zero external bias.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Danhao Wang, Xin Liu, Shi Fang, Chen Huang, Yang Kang, Huabin Yu, Zhongling Liu, Haochen Zhang, Ran Long, Yujie Xiong, Yangjian Lin, Yang Yue, Binghui Ge, Tien Khee Ng, Boon S. Ooi, Zetian Mi, Jr-Hau He, Haiding Sun
Summary: This study presents solar-blind self-powered photoelectrochemical-type photodetectors based on self-assembled AlGaN nanostructures on silicon, achieving significant enhancement of photon responsivity and record fast response/recovery time with proper surface platinum decoration. The high solar-blind photodetection is attributed to unparalleled material quality, fast interfacial kinetics, and high carrier separation efficiency, suggesting potential for designing future energy-efficient optoelectronic systems on a silicon platform.
Article
Chemistry, Physical
Meijiao Wang, Man Zhao, Dayong Jiang
Summary: Interface engineering of the hole transport layer in CH3NH3PbI3 photodetectors has achieved high-power conversion efficiency. However, heterojunction perovskite photodetectors suffer from high dark currents and low responsivities. In this study, self-powered heterojunction photodetectors were prepared using p-type CH3NH3PbI3 and n-type Mg0.2Zn0.8O, showing a high responsivity of 0.58 A/W. The CH3NH3PbI3/Au/Mg0.2Zn0.8O heterojunction photodetectors exhibited an EQE 10.23 times higher than CH3NH3PbI3/Au and 84.51 times higher than Mg0.2ZnO0.8/Au photodetectors. The built-in electric field of the p-n heterojunction suppressed dark current and improved responsivity. The self-powered heterojunction achieved a responsivity of up to 1.1 mA/W in self-supply voltage detection mode. The dark current of the CH3NH3PbI3/Au/Mg0.2Zn0.8O heterojunction photodetectors was significantly lower than CH3NH3PbI3 photodetectors, with a detectivity as high as 4.7 x 10(12) Jones. Additionally, the heterojunction photodetectors exhibited a uniform photodetection response over a wide spectral range from 200 to 850 nm. This work provides guidance for achieving low dark current and high detectivity in perovskite photodetectors.
Article
Chemistry, Physical
Chuantian Zuo, Lixiu Zhang, Xiyan Pan, He Tian, Keyou Yan, Yuanhang Cheng, Zhiwen Jin, Chenyi Yi, Xiaoliang Zhang, Wu-Qiang Wu, Qinye Bao, Liyuan Han, Liming Ding
Summary: We have successfully prepared lead halide perovskite films with gradients in bandgap using a facile low-temperature solution process. These films exhibit varying spectral responses at different positions, allowing for their potential use as alternatives to photoactive materials arrays in multi-spectral responsive devices, thus enabling miniaturization of the apparatus.
Review
Chemistry, Physical
Ampattu Ravikumar Jayakrishnan, Jose P. B. Silva, Katarzyna Gwozdz, Maria J. M. Gomes, Robert L. Z. Hoye, Judith L. MacManus-Driscoll
Summary: Self-powered photodetectors, which can operate without external power source, have shown excellent performance utilizing different effects like photovoltaic, pyroelectric, piezoelectric, and synergic effects. The recent discovery of the ferro-pyro-phototronic effect has gained significant interest in improving the performance of these devices. The potential of ferroelectricity in various technologies makes it worthwhile to explore how it enhances the triple coupling and its application in real-world scenarios.
Article
Nanoscience & Nanotechnology
Hamidreza Ghanbari, Amin Abnavi, Amirhossein Hasani, Fahmid Kabir, Ribwar Ahmadi, Mohammad Reza Mohammadzadeh, Mirette Fawzy, Thushani De Silva, Michael M. Adachi
Summary: Self-powered broadband photodetectors based on thin 2D materials and their heterostructures have been developed due to their unique optoelectronic properties. The p-WSe2/n-ZnO heterojunction exhibits a broadband response in the wavelength range of 300-850 nm and demonstrates rectifying behavior, high photoresponsivity, and detectivity at zero voltage bias. It also shows high-speed response and excellent performance under reverse voltage bias. This suggests that the p-WSe2/n-ZnO heterojunction is a promising candidate for high-performance, self-powered, and broadband photodetectors.
Article
Engineering, Multidisciplinary
QiuYue Wu, YuJin Liu, XinYue Huang, Xu Zheng, JieZhong He, Zhong Ji, WenJie Mai
Summary: By introducing a solution-processed organic material, PEDOT:PSS, on Ge wafers to form a heterojunction, the study improved the photoresponse performance of Ge-based PDs. Experimental results showed comparable performance to previously reported PDs and successful demonstration of biomedical imaging applications.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2021)
Article
Chemistry, Physical
Mengru Li, Haoran Sun, Yongqi Ruan, Chuan Cao, Peng Zhou, Yajun Qi, Tianjin Zhang
Summary: The photovoltaic effect and self-powered ultraviolet photodetection properties were studied in the Pt/Bi3.15Nd0.85Ti3O12 (BNT)/Pt heterostructure. The BNT films exhibited obvious photovoltaic characteristics with an open-circuit voltage of 0.67 +/- 0.04 V and a short-circuit current density of 2.27 +/- 0.08 mu A/ cm2 at a wavelength of 365 nm and a power of 77.50 mW/cm2. The self-powered ultraviolet photodetector showed a responsivity of 0.047 +/- 0.003 mA/W and a detection rate of (1.47 +/- 0.04) x 109 Jones. The reversed photocurrent response mechanism was explained based on the internal electric field for the separation and transport of photo-excited electron-hole pairs in the Pt/BNT/Pt heterostructure. The dependence of JSC on the polarization direction demonstrated the electrical manipulation nature of BNT-based self-powered photodetectors, offering a new approach for the design of photodetectors using ferroelectric oxides.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Yudi Tu, Toni Utsunomiya, Sho Kokufu, Masahiro Soga, Takashi Ichii, Hiroyuki Sugimura
Article
Chemistry, Multidisciplinary
Qi Wang, Yudi Tu, Takashi Ichii, Toru Utsunomiya, Hiroyuki Sugimura, Lifeng Hao, Rongguo Wang, Xiaodong He
Article
Chemistry, Multidisciplinary
Kunhua Yu, Yuya Takara, Yudi Tu, Toru Utsunomiya, Takashi Ichii, Hiroyuki Sugimura
Article
Chemistry, Multidisciplinary
Cheng-Tse Wu, Ahmed I. A. Soliman, Yudi Tu, Toru Utsunomiya, Takashi Ichii, Hiroyuki Sugimura
ADVANCED MATERIALS INTERFACES
(2020)
Article
Nanoscience & Nanotechnology
Danyun Xu, Zhe Guo, Yudi Tu, Xinzhe Li, Yu Chen, Zhesheng Chen, Bingbing Tian, Shuqing Chen, Yumeng Shi, Ying Li, Chenliang Su, Dianyuan Fan
Article
Chemistry, Multidisciplinary
Yudi Tu, Yan Xu, Junzi Li, Qiaoyan Hao, Xiaosong Liu, Dianyu Qi, Chunxiong Bao, Tingchao He, Feng Gao, Wenjing Zhang
Article
Chemistry, Multidisciplinary
Jingting Zhu, Yudi Tu, Lejuan Cai, Haibin Ma, Yang Chai, Lifu Zhang, Wenjing Zhang
Summary: The solar-irradiation strategy is used to prepare hybrid SA-Pt/MoS2 nanosheets with excellent HER activity. Downsizing Pt nanoparticles to single atoms can decrease cost and increase atomic utilization, showing potential for mass production. Theoretical simulations show that Pt improves H atom absorption and charge-transfer kinetics of MoS2, significantly enhancing HER activity.
Article
Chemistry, Inorganic & Nuclear
Junzi Li, Zhihang Guo, Shuyu Xiao, Yudi Tu, Tingchao He, Wenjing Zhang
Summary: It has been demonstrated that alloyed perovskite nanocrystals (NCs) with a small amount of Cd element can improve the stability of perovskite NCs. In this study, a series of CsPbxCd1-xBr3 NCs were synthesized using different amounts of CdBr2 as an alloyed metal precursor. The alloyed NCs exhibited a near-unity photoluminescence quantum yield, improved stability, and enhanced electron-phonon coupling strength, indicating their potential application as a laser gain medium.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Tong Tong, Yuquan Gan, Weisheng Li, Wei Zhang, Haizeng Song, Hehe Zhang, Kan Liao, Jie Deng, Si Li, Ziyue Xing, Yu Yu, Yudi Tu, Wenhui Wang, Jinlian Chen, Jing Zhou, Xuefen Song, Linghai Zhang, Xiaoyong Wang, Shuchao Qin, Yi Shi, Wei Huang, Lin Wang
Summary: By utilizing Janus-interface engineering, we designed a two-dimensional hybrid phototransistor that combines light-sensitive perovskite and spontaneously polarized ferroelectric materials, achieving collective ultrasensitive detection performance.
Article
Physics, Applied
Di Wu, Junzi Li, Qiaoyan Hao, Wenzhe Zhou, Zhuo Wang, Jidong Liu, Yudi Tu, Junjie Jiang, Dianyu Qi, Peng Li, Zixuan Wang, Haibo Gan, Guo Hong, Fei Liu, Tingchao He, Fangping Ouyang, Wenjing Zhang
Summary: We investigate the photo-generated dynamics in 2D heterostructures and find that there is no charge transfer between PbI2 and MoSe2, but the photoluminescence changes of MoSe2 are dominated by interlayer charge transfer. Density functional theory calculations show that the binding energies in MoSe2/WSe2 or MoSe2/MoS2 heterostructures are 2-3 times higher than that in MoSe2/PbI2 heterostructure, indicating weaker interlayer coupling between MoSe2 and PbI2. These findings are crucial for fundamental research and applications of novel optoelectronic devices based on 2D material heterostructures.
APPLIED PHYSICS LETTERS
(2023)
Review
Chemistry, Physical
Jingting Zhu, Lejuan Cai, Yudi Tu, Lifu Zhang, Wenjing Zhang
Summary: This review provides a comprehensive summary of the recent development of Ru single-atom catalysts (SACs) for the electrocatalytic hydrogen evolution reaction (HER). It gives an overview of synthesis strategies, atomically resolved characterization methods, and electrocatalytic studies. The unresolved challenges in the development of Ru SACs for industrial HER applications are discussed, and future research priorities are proposed.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Inorganic & Nuclear
Junzi Li, Zhihang Guo, Shuyu Xiao, Yudi Tu, Tingchao He, Wenjing Zhang
Summary: In this study, we synthesized core/shell hybrid perovskite nanocrystals with optimized optical stability and enhanced two-photon absorption, making them promising for application in nonlinear optoelectronic devices.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Yudi Tu, Hiroshi Nakamoto, Takashi Ichii, Toru Utsunomiya, Om Prakash Khatri, Hiroyuki Sugimura
Article
Engineering, Electrical & Electronic
Yudi Tu, Toru Utsunomiya, Takashi Ichii, Hiroyuki Sugimura
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
(2017)
