Article
Engineering, Electrical & Electronic
Guo-En Chang, Shui-Qing Yu, Jifeng Liu, Hung-Hsiang Cheng, Richard A. Soref, Greg Sun
Summary: Ge1-xSnx photodetectors are a new type of mid-infrared CMOS-compatible detectors with good performance. The study shows that Ge1-xSnx PDs have high responsivity and detectivity in infrared detection due to improved optical absorption and electron-hole mobility and diffusion lengths.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Junsung Park, Mohammad M. Al Mahfuz, Rock Huebner, Dong-Kyun Ko
Summary: Low-cost, uncooled photodetectors operating in the MWIR and LWIR spectral regions have wide applications and can dominate the future infrared market. Lead selenide (PbSe) has attracted research interest due to its low manufacturing cost and favorable properties. This study reports on MWIR photoconductive film derived from colloidal PbSe nanocrystals, demonstrating high sensitization and potential for future digital additive manufacturing of infrared sensors and imagers.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Shi Zhang, Li Han, Kening Xiao, Libo Zhang, Chaofan Shi, Leijun Xu, Ke Deng, Yuanchen Zou, Mengjie Jiang, Xuyang Lv, Yulin Zhu, Qing Li, Changlong Liu, Weiwei Tang, Guanhai Li, Songyuan Ding, Xiaoshuang Chen, Wei Lu
Summary: This paper introduces an infrared photodetector based on tantalum nickel selenide (Ta2NiSe5) with a hexagonal boron nitride (h-BN) encapsulation technique, operating in the wavelength range of 520 nm to 4.6 μm. The photodetector exhibits high responsivity, noise equivalent power, and peak detectivity under ambient conditions. The paper also investigates the photocurrent generation mechanisms, photopolarization dependence, and concealed-target imaging capability of the device. These findings suggest the potential of Ta2NiSe5 as a low-dimensional material for advanced nano-optoelectronic devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yeongho Kim, Saud Alotaibi, Mohamed Henini, Byong Sun Chun, Sang Jun Lee
Summary: A mid-wavelength p-B-i-n infrared photodetector, consisting of ternary alloys of InAs0.9Sb0.1 and AlAs0.05Sb0.95, has been successfully operated at room temperature. The detector showed high crystalline quality and low defect density, as confirmed by high-resolution x-ray diffraction analysis. The dark current behavior and deep-level traps in the detector structure were investigated, revealing diffusion-limited current and two shallow traps in the InAsSb absorber. The detector exhibited good performance in terms of cutoff wavelength, current responsivity, and dark current density, providing high specific detectivity.
Article
Engineering, Electrical & Electronic
Waldemar Gawron, Adam Damiecki, Andrzej Kozniewski, Piotr Martyniuk, Karol A. Stasiewicz, Pawel Madejczyk, Jaroslaw Rutkowski
Summary: This paper presents large area multiple photodetectors based on MOCVD grown HgCdTe heterostructures, offering a solution to the low dynamic resistance issue in conventional long wavelength photovoltaic detectors at high temperatures. Experimental steps and key technology parameters are detailed, showcasing the potential for uncooled multiple detectors with high detectivity.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Wukang Zhang, Honglei Chen, Ruijun Ding
Summary: This paper proposes a novel BDS circuit that allows for the selection of three readout modes based on different magnitudes of dark current, background current, dynamic range, heterogeneity, and frame rate, while ensuring accuracy of BDS with a double-threshold comparator. The BDS circuit can serve as a reference for large-scale infrared focal plane arrays.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Physics, Applied
Leisheng Su, Yun Liu, Hong Lu, Heqiu Zhang, Yiming Yang, Jijun Qiu
Summary: A novel pBn+ barrier detector architecture based on a lead selenide/indium selenide barrier structure is proposed to suppress the dark current, achieving high performance uncooled mid-wave IR (MWIR) photodetectors.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Ryosuke Nishikubo, Shaoxian Li, Akinori Saeki
Summary: This paper reports an unprecedented wavelength-dependent photovoltaic effect in antimony chalcoiodide and antimony chalcoiodide-antimony sulfide devices, where the open-circuit voltage can be rapidly and reversibly changed by changing the irradiation wavelength. This effect allows for a wavelength-recognizable single-junction photodetector and provides deep insights into photovoltaic physics.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Yu Zhang, Zilun Qin, Xiaomin Huo, Dandan Song, Bo Qiao, Suling Zhao
Summary: A new strategy was reported to prepare a short wavelength light filter based NIR-PDs by introducing an interface layer, achieving the effective filtering out of short wavelength light component in the signal spectrum. The device showed high external quantum efficiency, detectivity, responsivity, and quick response time, demonstrating significant advantages over other reported NIR photodetectors.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Jijun Qiu, Leisheng Su, Lance L. McDowell, Quang Phan, Yun Liu, Guodong Zhang, Yiming Yang, Zhisheng Shi
Summary: In this study, a high-performance uncooled mid-wavelength infrared (MWIR) detector was developed through vapor physical deposition. The resulting PbSe/CdSe heterojunction photo-voltaic (PV) detector exhibited comparable performance to standard PbSe photoconductive detectors. The sensitization-free process used in manufacturing allows for high replicability, making these PV detectors promising for low-cost, high-performance, uncooled MWIR imaging.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Mohit Kumar, Jaeseong Lim, Ji-Yong Park, Hyungtak Seo
Summary: This study demonstrates the self-powered giant short-wavelength infrared photoresponse driven by the flexoelectric effect in centrosymmetric bulk silicon, exceeding the fundamental bandgap. The performance includes a large on/off ratio, extremely high sensitivity, good responsivity, decent specific detectivity, and rapid response speed.
Article
Physics, Multidisciplinary
Junkai Jiang, Faran Chang, Wenguang Zhou, Nong Li, Weiqiang Chen, Dongwei Jiang, Hongyue Hao, Guowei Wang, Donghai Wu, Yingqiang Xu, Zhi-Chuan Niu
Summary: High performance short-wavelength infrared PBn photodetectors based on InAs/GaSb/AlSb superlattices on GaSb substrate have been demonstrated. At 300 K, the device exhibits a 50% cut-off wavelength of similar to 2.1 μm as predicted from the band structure calculation; the device responsivity peaks at 0.85 A/W, corresponding to a quantum efficiency (QE) of 56% for 2.0 μm-thick absorption region. The dark current density of 1.03 x 10(-3) A/cm(2) is obtained under 50 mV applied bias. The device exhibits a saturated dark current shot noise limited specific detectivity (D*) of 3.29 x 10(10)cm center dot Hz(1/2)/W (at a peak responsivity of 2.0 μm) under -50 mV applied bias.
Review
Chemistry, Multidisciplinary
Rui Cao, Sidi Fan, Peng Yin, Chunyang Ma, Yonghong Zeng, Huide Wang, Karim Khan, Swelm Wageh, Ahmed A. Al-Ghamd, Ayesha Khan Tareen, Abdullah G. Al-Sehemi, Zhe Shi, Jing Xiao, Han Zhang
Summary: This article summarizes the recent progress and potential of 2D materials in mid-infrared optoelectronic devices. The limitations of graphene are mentioned. The authors believe that research on 2D materials beyond graphene will soon emerge and make a positive contribution to the commercialization of nanodevices.
Article
Chemistry, Multidisciplinary
Ting He, Zhen Wang, Ruyue Cao, Qing Li, Meng Peng, Runzhang Xie, Yan Huang, Yang Wang, Jiafu Ye, Peisong Wu, Fang Zhong, Tengfei Xu, Hailu Wang, Zhuangzhuang Cui, Qinghua Zhang, Lin Gu, Hui-Xiong Deng, He Zhu, Chongxin Shan, Zhongming Wei, Weida Hu
Summary: 2D layered photodetectors have been widely studied for their optoelectronic properties, but are limited by bandgap. Extending detection waveband through extrinsic photoconduction can enhance functionalities. Ge-based chalcogenides demonstrate extrinsic photoconduction-induced short-wavelength infrared photodetectors for the first time, broadening detection waveband with assistance of Ge vacancies. This approach provides design strategies to enrich the functionalities of 2D layered photodetectors.
Article
Materials Science, Multidisciplinary
Jijun Qiu, Yun Liu, Zhihua Cai, Quang Phan, Zhisheng Shi
Summary: The article introduces a method of using indium-doped cadmium selenide (CdSe:In) for infrared transparent and conductive coatings (ITCC) electrodes, which have high transparency and excellent conductivity, providing a technical solution for the manufacturing of low-cost uncooled lead salt FPA imaging devices.
MATERIALS ADVANCES
(2022)
Article
Chemistry, Multidisciplinary
Qing Xia, Weiwei Xie, Tingchao He, Hongyan Zhang, Zujin Zhao, Guangxi Huang, Bing Shi Li, Ben Zhong Tang
Summary: This study demonstrates a versatile cholesterol-containing tetraphenylethene derivative that can provide rich anticounterfeiting effects through the synergistic use of multiple optical properties. This offers important insights for designing advanced multimodal anticounterfeiting technology.
Article
Chemistry, Multidisciplinary
Can Ren, Die Hu, Yanyan Cui, Peixian Chen, Xiaoqian Xu, Jiaji Cheng, Tingchao He
Summary: Water-soluble Ag-doped InP/ZnS quantum dots with high photoluminescence quantum yield were synthesized and characterized. Their maximum two- and three-photon absorption cross sections were determined to be similar to 1.7 x 10(4) GM at 820 nm and similar to 1.7 x 10(-76) cm(6) s(2) photon(-2) at 1260 nm. Importantly, it was demonstrated for the first time that Ag-doped InP/ZnS QDs can be used for type-I photodynamic therapy and are more suitable for the hypoxic environment of tumors.
CHEMICAL COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Yue Gu, Runzhang Xie, Peng Wang, Qing Li, Yuanchen Zou, Shuning Liu, Kun Zhang, Yang Wang, Hailu Wang, Fang Wang, Lu Chen, Weida Hu
Summary: HgCdTe avalanche photodiodes (APDs) are important for MWIR photoelectric detectors in optical communication and light detection. Analyzing the carrier transport mechanism in these devices is crucial to bridge the gap between device bandwidth and theoretical limit. A finite element model is used to analyze carrier transport for different device structures and bias voltages, and optimization of structural parameters results in increased device bandwidth and reduced dark current. The results provide guidance for high-speed HgCdTe device design.
IEEE JOURNAL OF QUANTUM ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Kaixuan Zhang, Zhen Hu, Libo Zhang, Yulu Chen, Dong Wang, Mengjie Jiang, Gianluca D'Olimpio, Li Han, Chenyu Yao, Zhiqingzi Chen, Huaizhong Xing, Chia-Nung Kuo, Chin Shan Lue, Ivana Vobornik, Shao-Wei Wang, Antonio Politano, Weida Hu, Lin Wang, Xiaoshuang Chen, Wei Lu
Summary: This study exploits low-energy type-II Dirac fermions in topological semimetals for ultrasensitive THz detection, and demonstrates a novel photodetector combining two Dirac materials, graphene and NiTeSe, with high responsivity, fast response time, and outstanding stability.
Article
Materials Science, Multidisciplinary
Kangjie Li, Ting He, Nan Guo, Tengfei Xu, Xiao Fu, Fang Wang, Hangyu Xu, Guohua Li, Shuning Liu, Ke Deng, Yunlong Xiao, Jinshui Miao, Weida Hu
Summary: This article introduces a semiconductor homojunction based on 2D materials, which is a promising candidate for optoelectronic logic devices. The homojunction is made from vertically stacked MoTe2/CuInP2S6/Au layers in a dual-floating gate transistor configuration. Through the band alignment between MoTe2 and CuInP2S6, the polarity of the MoTe2 homojunctions can be modulated by the floating gate, achieving logic gate XOR without the need for applied voltage. The devices also show anomalous photoresponse and optical memory behaviors, indicating their potential for fully light-actuated sensing capability in optoelectronic logic devices.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xinming Zhang, Song Lin, Feng Zhao, Jing Zhang, Shan Lei, Fang Bai, Qiang Liu, Jiayingzi Wu, Ting He, Peng Huang, Jing Lin
Summary: A programmably controllable delivery system based on croconium dye (Croc)-ferrous ion (Fe2+) nanoprobes (CFNPs) is developed for multiscale dynamic imaging guided photothermal primed CDT. The CFNPs achieve pH-responsive visualization and accurate Fe2+ release in cancerous tissues under the coactivation of acidity and near-infrared (NIR) light. By leveraging multiscale dynamic imaging technologies, the complicated spatiotemporal release of Fe2+ is sketched in a programmably controllable manner, revealing the domino effect of tumor pH level, photothermal effect, and CDT within the disease microenvironment.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Fang Wang, Tao Zhang, Runzhang Xie, Anna Liu, Fuxing Dai, Yue Chen, Tengfei Xu, Hailu Wang, Zhen Wang, Lei Liao, Jianlu Wang, Peng Zhou, Weida Hu
Summary: With the continuous advancement of nanofabrication techniques and the discovery of useful manipulation mechanisms in high-performance applications, the morphology and usage of junction devices in photodetectors have undergone fundamental revolution. New types of photodetectors, not relying on any junction, have emerged, offering high signal-to-noise ratio and multidimensional modulation. This review focuses on a unique category of material systems, van der Waals materials, which support novel high-performance photodetectors beyond junctions.
ADVANCED MATERIALS
(2023)
Review
Computer Science, Interdisciplinary Applications
Ting He, Anas Belouali, Jessica Patricoski, Harold Lehmann, Robert Ball, Valsamo Anagnostou, Kory Kreimeyer, Taxiarchis Botsis
Summary: Identifying patient cohorts with specific phenotypes is essential in biomedicine, and many research groups have developed pipelines to automate this task. This study conducted a systematic review on computable clinical phenotyping, analyzing 139 selected records to extract information on target use cases, data-related topics, phenotyping methodologies, evaluation strategies, and portability of developed solutions. The findings highlight the need for defining target use cases, moving away from sole machine learning strategies, and evaluating proposed solutions in real settings.
JOURNAL OF BIOMEDICAL INFORMATICS
(2023)
Article
Physics, Condensed Matter
Yuri D. Glinka, Tingchao He, Xiao Wei Sun
Summary: Separate relaxation dynamics of long-lived holes in Bi2Se3 film were observed at room temperature using transient absorption spectroscopy. The ultraslow dynamics and long rise time are attributed to the resonance conditions for multiphoton photoemission and the intervalley scattering in the film. The dynamics of massive Dirac fermions predominantly determines the relaxation of photoexcited carriers.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Chemistry, Physical
Xuanyu Zhang, Shuyu Xiao, Zhihang Guo, Baozhen Yuan, Xiongbin Wang, Samo Zhang, Yueqing Shi, Guichuan Xing, Tingchao He, Rui Chen
Summary: It is found that constructing core-shell structure of FAPbBr(3)/CsPbBr3 nanocrystals can enhance the action cross section of high-order multiphoton absorption. Fluorescence induced by up to five-photon absorption was observed. The increased dielectric constant promotes modulation of multiphoton absorption effects through the local field effect, and the quasi-type-II band alignment suppresses the biexciton Auger recombination, ensuring stronger multiphoton absorption induced fluorescence. Furthermore, the core-shell structure reduces defect density and promotes nonradiative energy transfer through the antenna-like effect. This work provides a new avenue for the development of high-performance multiphoton excited nanomaterials for future photonic integration.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Mengqi Liu, Shuang Xia, Wenjian Wan, Jun Qin, Hua Li, Changying Zhao, Lei Bi, Cheng-Wei Qiu
Summary: Using doped InAs multilayers under moderate external magnetic fields with gradient epsilon-near-zero frequencies, broadband non-reciprocal absorption that can be tailored within the mid-infrared spectral region has been demonstrated. The study of magneto-optical absorption has stimulated diverse energy-technology-related explorations, showing potential in breaking the current theoretical efficiency limits of energy devices compared with reciprocal counterparts. However, experimentally realizing strong infrared non-reciprocal absorption remains an open challenge, and existing proposals of non-reciprocal absorbers are restricted to a narrow working waveband.
Review
Chemistry, Multidisciplinary
Tiange Zhao, Jiaxiang Guo, Taotao Li, Zhen Wang, Meng Peng, Fang Zhong, Yue Chen, Yiye Yu, Tengfei Xu, Runzhang Xie, Pingqi Gao, Xinran Wang, Weida Hu
Summary: The fabrication of large-area two-dimensional (2D) materials is crucial for their industrial applications, and chemical vapor deposition (CVD) is a promising method for producing high-quality films at scale. Recent advances in epitaxial growth of large-area single-crystalline graphene, hexagonal boron nitride, and transition-metal dichalcogenides have emphasized the importance of substrate engineering in terms of lattice orientation, surface steps, and energy considerations. This review focuses on the current strategies and underlying mechanisms, and discusses future directions in epitaxial substrate engineering for wafer-scale integration of 2D materials in electronics and photonics.
CHEMICAL SOCIETY REVIEWS
(2023)
Article
Nanoscience & Nanotechnology
Chunhui Hao, Xiao Fu, Xiaoyong Jiang, Yutong Li, Juyi Sun, Haitao Wu, He Zhu, Qing Li, Yunhai Li, Zhangcheng Huang, Fang Zhong, Ting He, Jinshui Miao, Weida Hu
Summary: Most greenhouse gases come from biological activities and industry, leading to global warming and impacting human life. Detection and management of greenhouse gases and hazardous gases in the environment are increasingly demanding for the green transformation of the global economy and seeking higher quality of human life. Gas sensors capable of detecting gas volume fractions from 10-9 to 10-4 are required in various fields. This review summarizes the mechanisms of common gas detectors, discusses the advantages of nanostructured gas sensors, and describes the applications of infrared gas sensors based on nanophotonic devices, providing an outlook on their future development.
IEEE OPEN JOURNAL OF NANOTECHNOLOGY
(2023)
Article
Optics
Fuli Zhao, Yanyan Cui, Anfu Wang, Yang Gao, Tingchao He
Summary: This work reports the optical properties of inverted type-I ZnSe/InP/ZnS quantum dots (QDs) with photoluminescence (PL) emission in the near-infrared (NIR) range. The QDs exhibit higher exciton-binding energy and weaker carrier-phonon coupling effect than conventional type-I InP-based QDs. In addition, they show strong two-photon absorption characteristics in the second biological window.
JOURNAL OF LUMINESCENCE
(2024)
