Article
Multidisciplinary Sciences
Yixuan Zou, Zekun Zhang, Jiawen Yan, Linhan Lin, Guan-Yao Huang, Yidong Tan, Zheng You, Peng Li
Summary: This study reports a high-temperature photodetector with unconventional negative photoconductivity and high photoresponsivity. The device demonstrates excellent performance in harsh environments, showing both high temperature endurance and flexibility, which is promising for future development of optoelectronic devices.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Weitao Yang, Weiming Qu, Epimitheas Georgitzikis, Eddy Simoen, Jill Serron, Jiwon Lee, Itai Lieberman, David Cheyns, Pawel Malinowski, Jan Genoe, Hongzheng Chen, Paul Heremans
Summary: This study successfully demonstrated NIR photodiodes based on non-fullerene acceptors with ultralow dark current density and high external quantum efficiency by innovating on charge transport layers. The research also showed the versatility of the method for mitigating dark current for different non-fullerene systems in NIR photodiodes, as well as the practical application of NIR organic photodiodes in image sensors.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Baoquan Huang, Zehong Lei, Xuanhao Cao, Aixiang Wei, Lili Tao, Yibin Yang, Jun Liu, Zhaoqiang Zheng, Yu Zhao
Summary: A new strategy using In2Te3 powder as the source for high-temperature vapor deposition of 2D tellurium flakes was developed, resulting in synthesized Te flakes with excellent optoelectronic properties. The synthesized Te flakes showed outstanding electrical resistivity and field-effect hole mobility, as well as a wide response to visible light in a photodetector application with an ultrahigh photoresponsivity.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Applied
Bing-Huang Jiang, Yu-Ting Liao, Yu-Hsuan Tu, Ken-Tsung Wong, Chih-Ping Chen
Summary: In this study, the performance of donor molecules with an isoindigo-based core was compared to that of a thienoisoindigo-based counterpart in all-small-molecule-based optoelectronic devices. The isoindigo-based molecule showed deeper energy level, efficient light harvesting, and higher carrier mobility, leading to over eight times greater organic photovoltaic performance compared to the thienoisoindigo-based molecule. The optimized organic photodetector incorporating the isoindigo-based molecule exhibited excellent properties, suggesting great potential for isoindigo as a building block for OPDs.
Article
Chemistry, Applied
Ji Yeon Son, Hyeong Ju Eun, Gyeong Uk Seo, Ah Young Lee, Ju-Hyung Kim, Jong H. Kim
Summary: This study investigates the impact of annealing time on the performance of near-infrared organic photodetectors (NIR-OPDs) using hole-blocking ZnO layers prepared by a sol-gel process. The results show that a 20-minute annealing time leads to the lowest dark current density and highest specific detectivity, attributed to improved interface and effective suppression.
Article
Chemistry, Physical
Weidong Song, Zhong Liang, Yue Guo, Xingjun Luo, Xin He, Qing Liu, Yiming Sun, Shuti Li
Summary: In this work, Ti3C2 nanoflakes were used to enhance the deep-UV band absorption of ZnO photodetectors. The anchored nanoflakes formed van der Waals heterojunctions with ZnO, resulting in surface depletion and passivation, which effectively reduced dark current and improved photocurrent. The Ti3C2 nanoflakes anchored ZnO photodetector exhibited significantly enhanced photoresponse, particularly in the deep-UV range.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Nurul Ridho Al Amin, Chih-Chien Lee, Yu-Chen Huang, Chun-Jen Shih, Richie Estrada, Sajal Biring, Meng-Hsueh Kuo, Chia-Feng Li, Yu-Ching Huang, Shun-Wei Liu
Summary: In this study, a highly stable photodetector was fabricated using Cs0.06FA0.94Pb(I0.68Br0.32)3 perovskite material through an all-vacuum process. The photodetector achieved a high current density under standard solar illumination and maintained a low current density at zero bias voltage. The device showed comparable performance to a silicon-based photodetector and maintained 95% of its initial performance after 960 hours of continuous exposure. The outstanding results were attributed to the all-vacuum deposition process, which provided a film with high stability and good uniformity, delaying the degradation process. Impedance spectroscopy was used to investigate the degradation mechanism and understand the charge dynamics in the photodetector under different exposure times.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Jianfei Huang, Jaewon Lee, Hidenori Nakayama, Max Schrock, David Xi Cao, Kilwon Cho, Guillermo C. Bazan, Thuc-Quyen Nguyen
Summary: The universal problem of detrimental sensitivity of dark current to illumination history in high-performance inverted OPDs poses challenges to achieving high sensitivity and consistent figures-of-merit. Through systematic studies, it has been shown that the exposure of commonly used electron transport layer to high-energy photons leads to the loss of charge selectivity, hindering the attainment of high sensitivity and consistent performance characteristics. The use of double layer tin oxide as an alternative electron transport layer has been demonstrated to solve this issue.
Article
Chemistry, Physical
Pheiroijam Pooja, P. Chinnamuthu
Summary: Annealed TiO2/In2O3 nanowire metal-insulator-semiconductor devices exhibit superior performance with enhanced photosensitivity, responsivity, and quantum efficiency at 330 nm wavelength illumination, showing potential for efficient optoelectronics UV photodetection applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Chang Liu, Xiaodong Li, Tiangui Hu, Wenkai Zhu, Faguang Yan, Tiesheng Wu, Kaiyou Wang, Lixia Zhao
Summary: Integrating GaN nanopillars with graphene/GaN/Ti/Au photodetector enhances detection performance. The nanopillars reduce dark current by decreasing contact area between GaN and graphene electrode. When illuminated with UV light, the nanopillars create enhanced electric field and increase UV light absorption and photocurrent.
Article
Nanoscience & Nanotechnology
Mengting Qiu, Zhenglin Jia, Mingyang Yang, Kazhihito Nishimura, Cheng-Te Lin, Nan Jiang, Qilong Yuan
Summary: In this work, a metal-semiconductor-metal structure two-dimensional h-BN photodetector was fabricated, which exhibited ultralow dark current, high rejection ratio and high detectivity. Furthermore, the h-BN photodetector showed good thermal stability, indicating its potential applications in high-temperature solar-blind photodetection.
Article
Engineering, Electrical & Electronic
Saba Khalili, Hossein Mahmoudi Chenari, Zeynep Orhan, Fatma Yildirim, Sakir Aydogan
Summary: We present a photodetector composed of electrospun SnO2 nanofibers on an n-type Si wafer, forming a SnO2 NFs/n-Si heterojunction architecture. The microstructure of the SnO2 NFs was analyzed using advanced X-ray diffraction. Optical properties were studied through DRS spectrum and photoluminescence measurements. In addition, the electrical characteristics of the SnO2 NFs/n-Si device, such as current-voltage, capacitance/conductance-voltage, and capacitance-frequency measurements, were analyzed in the dark. The photodetector characteristics, including ON/OFF ratio, detectivity, and responsivity, were also investigated under different light intensities.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Chemistry, Physical
Yang Chen, Ke Jiang, Hang Zang, Jianwei Ben, Shanli Zhang, Zhiming Shi, Yuping Jia, Wei Lu, Dabing Li, Xiaojuan Sun
Summary: This study reports the growth of high-quality and wafer-scale graphene on dielectric substrates using solid polymer carbon source, assisted by a Nickel/SiO2 capping layer, achieving successful growth on sapphire substrates. The dynamics of graphene growth involve polymer carbonization, carbon dissolution, segregation, and precipitation.
Article
Nanoscience & Nanotechnology
Titao Li, Wei Zheng, Siqi Zhu, Fei Wang, Yanming Zhu, Lemin Jia, Zeguo Lin, Feng Huang
Summary: (AlxGa1-x)(2)O-3 is a promising wide-band-gap sesquioxide for VUV photodetectors and high-power field-effect transistors. This study proposed a high-pressure O-2 (20 atm) annealing strategy to improve the crystallinity of beta-(AlxGa1-x)(2)O-3 and achieve a tunable optical band gap, revealing the local structure of Al3+ and the kinetic mechanism of Al3+ diffusion. The combination of HPOA-treated beta-(Al0.69Ga0.31)(2)O-3 films with p-type graphene led to the fabrication of a VUV photovoltaic detector with improved photovoltage and fast temporal response, providing an important strategy for enhancing the band-gap tunability of sesquioxides and zero-power-consumption photodetectors.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Bo Yu, Yongjing Deng, Zhongzhong Luo, Mengzhu Wang, Yanling Zhuang, Xi Chen, Shujuan Liu, Qiang Zhao
Summary: A novel organic polymer with near-infrared-absorbing moieties was designed and synthesized to construct high-performance broadband photodetectors. This work opens a new possibility for the application of high-performance organic broadband photodetectors.
ADVANCED ELECTRONIC MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Binghao Wang, Wei Huang, Michael J. Bedzyk, Vinayak P. Dravid, Yan-Yan Hu, Tobin J. Marks, Antonio Facchetti
Summary: This article provides an overview of the research progress in transparent conducting oxides (TCOs) and amorphous metal oxide (a-MO) semiconductors. The focus is on combustion synthesis (CS) and polymer doping as two promising approaches to optimize materials quality and manufacturing efficiency. The article discusses the advantages and challenges of these methods.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Guoping Li, Liang-Wen Feng, Subhrangsu Mukherjee, Leighton O. Jones, Robert M. Jacobberger, Wei Huang, Ryan M. Young, Robert M. Pankow, Weigang Zhu, Norman Lu, Kevin L. Kohlstedt, Vinod K. Sangwan, Michael R. Wasielewski, Mark C. Hersam, George C. Schatz, Dean M. DeLongchamp, Antonio Facchetti, Tobin J. Marks
Summary: This study compares two types of end group fluorination patterns on Y6-based A-DAD-A cores, resulting in highly efficient NFAs: direct skeletal fluorination (BTF) and indirect trifluoromethyl fluorination (BTFM). The performance trends of BTF vs. BTFM OSCs can be correlated with diffraction-derived differences in molecular packing. DFT reveals low internal reorganization energies and high electronic coupling between NFA dimers, providing extended 3D charge transport networks in thin film crystalline domains.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Physical
Xiaohua Zhang, Guoping Li, Subhrangsu Mukherjee, Wei Huang, Ding Zheng, Liang-Wen Feng, Yao Chen, Jianglin Wu, Vinod K. Sangwan, Mark C. Hersam, Dean M. DeLongchamp, Junsheng Yu, Antonio Facchetti, Tobin J. Marks
Summary: In this study, the fluorination of the NFA end group was systematically investigated to understand how it affects the morphology and photovoltaic performance of the blend. The results showed that highly fluorinated NFA molecules can improve the BHJ morphology, enhance NFA-cathode contact, and enhance the photovoltaic performance of the OSC.
ADVANCED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Aritra Sil, Elise A. Goldfine, Wei Huang, Michael J. Bedzyk, Julia E. Medvedeva, Antonio Facchetti, Tobin J. Marks
Summary: Zirconium oxide (ZrOx) is a metal oxide dielectric material with high dielectric constant, transparency, and flexibility. This study investigates the effect of fluoride doping on the structure, properties, and functions of solution-processed ZrOx films. The results show that fluoride doping has minimal impact on the capacitance instability of F:ZrOx films, but improves the performance of thin-film transistors by reducing hysteresis and increasing bias stress stability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Electrical & Electronic
Jiahao Wang, Libing Bai, Cong Chen, Jie Zhang, Quan Zhou, Lulu Tian, Jun Luo, Wei Huang, Yuhua Cheng
Summary: In this article, a field reconstruction technique based on scanning laser displacement measurement is developed to accurately capture the dynamic deformation field distribution on the surface of IGBT chips. The impacts of switching conditions on the deformation fluctuation characteristics of IGBT chips are investigated comprehensively. The results show that the middle region of the IGBT chip suffers from a relatively larger deformation compared to the edge area. In addition, the deformation fluctuation is negatively correlated with the switching frequency, positively related to load amplitude, and shows a trend of increasing first, and then, decreasing with duty cycle.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Multidisciplinary Sciences
Wei Huang, Jianhua Chen, Yao Yao, Ding Zheng, Xudong Ji, Liang-Wen Feng, David Moore, Nicholas R. Glavin, Miao Xie, Yao Chen, Robert M. Pankow, Abhijith Surendran, Zhi Wang, Yu Xia, Libing Bai, Jonathan Rivnay, Jianfeng Ping, Xugang Guo, Yuhua Cheng, Tobin J. Marks, Antonio Facchetti
Review
Chemistry, Multidisciplinary
Yao Yao, Wei Huang, Jianhua Chen, Xiaoxue Liu, Libing Bai, Wei Chen, Yuhua Cheng, Jianfeng Ping, Tobin J. Marks, Antonio Facchetti
Summary: Flexible and stretchable bioelectronics, such as organic electrochemical transistors (OECTs), have received significant attention for in situ monitoring of biological systems. These devices exhibit advantages in biological sensing due to their ionic switching behavior, low driving voltage, and high transconductance. Recent research has focused on developing flexible/stretchable OECTs (FSOECTs) for biochemical and bioelectrical sensors, and this review summarizes the major accomplishments and challenges in this field.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Yujie Peng, Lin Gao, Changjian Liu, Jinyi Deng, Miao Xie, Libing Bai, Gang Wang, Yuhua Cheng, Wei Huang, Junsheng Yu
Summary: This work demonstrates stretchable synaptic OECTs using a three-dimensional P3HT/SEBS blend porous elastic film which can fully emulate biological synaptic behaviors. The architecture allows for adjustable OECT output and hysteresis, enabling plasticity transition. The stretchable synaptic OECTs exhibit excellent mechanical robustness at a 30% strain and reliable electrical characteristics after 500 stretching cycles. Furthermore, near-ideal weight updates, symmetric long-term potentiation and depression, and image simulation applications are validated.
Article
Materials Science, Multidisciplinary
Miao Xie, Huifang Liu, Mengge Wu, Cong Chen, Jinjie Wen, Libing Bai, Junsheng Yu, Wei Huang
Summary: Organic electrochemical transistors (OECTs) have attracted significant research interest in the field of bioelectronics due to their low driving voltage, high transconductance, and mechanical robustness. However, the irreversible effect of the doping/dedoping process on the micro/nano structures and/or chemical formula of the semiconductors results in inferior cycling stability compared to other transistor techniques. This review summarizes the mechanisms of how this process influences the micro/nano structures and chemical formulas, presents state-of-the-art high-performance OECTs with decent cycling stabilities, and discusses future perspectives on enhancing cycling stability.
ORGANIC ELECTRONICS
(2023)
Article
Multidisciplinary Sciences
Yi Xing, Mingjie Zhou, Yueguang Si, Chi-Yuan Yang, Liang-Wen Feng, Qilin Wu, Fei Wang, Xiaomin Wang, Wei Huang, Yuhua Cheng, Ruilin Zhang, Xiaozheng Duan, Jun Liu, Ping Song, Hengda Sun, Hongzhi Wang, Jiayi Zhang, Su Jiang, Meifang Zhu, Gang Wang
Summary: Researchers have developed a polyelectrolyte-based fiber-shaped ionic-junction through an integrated opposite charge grafting method that enables large-scale continuous fabrication. These ionic-junction fibers can be integrated into functions such as ionic diodes and ionic bipolar junction transistors, allowing for rectification and switching of input signals. The fibers also demonstrate synaptic functionality through fiber memory capacitance. Additionally, successful nerve signal conduction is achieved by connecting the ionic-junction fiber to the sciatic nerves of mice, simulating end-to-side anastomosis and validating their potential for implantable bioelectronics and artificial neural pathways.
NATURE COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Changjian Liu, Jinyi Deng, Lin Gao, Jingliang Cheng, Yujie Peng, Hongjuan Zeng, Wei Huang, Liang-Wen Feng, Junsheng Yu
Summary: Porous films provide a simple strategy for balancing the electron/hole transport and ion doping/dedoping process in organic electrochemical transistors (OECTs). In this study, a 3D integrated approach was demonstrated to achieve enhanced transconductance (g(m)) and mechanical stretchability by constructing a multilayer breath-figured porous polymer channel. The porous structure not only provides efficient ion-electron coupling and transport pathways, but also offers resistance against mechanical deformation. The results showed that the 3D porous structure enhanced the stretchability and electrical performance of OECTs, making it a promising approach for stretchable electronics.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Applied
Mingshuai Yuan, Wei Xu, Wukun Zhang, Jianhao Zhao, Huizi Li, Qingguo He, Wei Huang, Jiangong Cheng, Yanyan Fu
Summary: Fluorescent film sensors are widely used for detecting toxic gases, but the design and synthesis of high-performance sensitive materials are complex. This study demonstrates that the sensing performance of fluorescent sensors can be enhanced by simply growing or depositing zinc oxide film on a quartz substrate. The catalytic properties of the zinc oxide buffer effectively accelerate the sensing process between the probe molecules and H2O2 gas.
Article
Materials Science, Multidisciplinary
Elisa Trippodo, Vincenzo Campisciano, Liang-Wen Feng, Yao Chen, Wei Huang, Joaquin M. Alzola, Ding Zheng, Vinod K. Sangwan, Mark C. Hersam, Michael R. Wasielewski, Bruno Pignataro, Francesco Giacalone, Tobin J. Marks, Antonio Facchetti
Summary: Organic solar cells based on donor-acceptor blends have shown great potential in efficiency improvement, but performance degradation is still a major obstacle for commercialization. Ternary solar cells with fullerene acceptors as the third component exhibit enhanced stability with over 90% retention of initial power conversion efficiency even after 6 months of storage. This improved stability is attributed to a more robust blend morphology that reduces charge recombination in the aging process.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Yueheng Zhong, Qicheng Liang, Zhu Chen, Fengming Ye, Maomao Yao, Jingling Zhang, Zhuoqing Yang, Wei Huang, Hengda Sun, Liang-Wen Feng, Meifang Zhu, Gang Wang
Summary: This study successfully fabricates photopatterned vertical OECT devices on fiber surfaces, including the first n-type and high-performance p-type fiber-shaped OECT devices. The devices exhibit excellent performance, cycling stability, and potential applications. In addition, logic gates derived through weaving and knitting textures of the fiber-shaped OECT devices are successfully demonstrated.
CHEMISTRY OF MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Jinjie Wen, Jie Xu, Wei Huang, Cong Chen, Libing Bai, Yuhua Cheng
Summary: Organic electrochemical transistors (OECTs) are a promising sensing technique with advantages such as high sensitivity, low power dissipation, and easy fabrication. Integrated sensing systems, especially OECT-based sensing arrays, have been widely studied to fully utilize the potential of OECT sensors.
IEEE OPEN JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Jinfei Dai, Chenjing Zhao, Jie Xu, Hossein Roshan, Hua Dong, Francesco Di Stasio, Fang Yuan, Bo Jiao, Zhaoxin Wu
Summary: In this study, the performance of perovskite nanocrystal light emitting diodes (PNC-LEDs) was enhanced through rational device structure design and the application of high-performance perovskite nanocrystal emitting layers.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Jia-Hua Yeh, Suhendro Purbo Prakoso, Leon Lukhas Santoso, Shi-Ju Chen, Bryan Chiang, Ju-Chieh Cheng, Ru-Ning Zhang, Yu-Cheng Chiu
Summary: This study demonstrates the application of a renewable material called dextrin-SMS in the production of electret filters and transistor memory. Dextrin-SMS material can maintain prolonged electrostatic charges and has a relatively wide memory window, making it suitable for the production of biodegradable face masks and green electronics.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Ahmad Telfah, Qais M. Al-Bataineh, Ahmad A. Ahmad, Rund Abu-Zurayk, Carlos J. Tavares, Johannes Etzkorn, Farzad Foadian
Summary: Polyacrylic acid complexed with polyaniline (PAA/PANI) composite materials have the potential to form organic mixed ion-electron conductive (OMIEC) films, which can be used in optoelectronic and energy storage applications. The composite films are formed through an acid-base reaction, resulting in strong electrostatic interactions and intermolecular hydrogen bonds between PANI and PAA. The separation of PANI-rich domains from PAA-rich matrix in the composite films is observed. The electrical conductivity of the composite films is higher when the content of PANI is 33 wt%, due to the high ionic-electronic coupling at the interface between phase-separated regions.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Min-Chih Hou, Dian Luo, Yu-Ting Huang, Shun-Wei Liu, Chin-Wei Lu, Chih-Hao Chang, Hai-Ching Su
Summary: Light-emitting electrochemical cells (LECs) have great potential for novel emission applications, but their relatively low device efficiency hinders their competitiveness with other emission technologies. A study finds that increasing the concentration of small TiO2 nano-particles in the diffuser film can enhance light extraction and improve the device efficiency of LECs.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Qiaoli Niu, Yao Xu, Jun Yang, Wei Hua, Baoxiang Chai, Zequan Zhang, Yuhui Ma, Wenjin Zeng, Ana Flavia Nogueira, Ruidong Xia
Summary: By introducing CPB as a defect passivation agent in the perovskite precursor solution, the optoelectronic properties of perovskite films can be significantly improved and non-radiative carrier recombination can be effectively suppressed. CPB-modified perovskite solar cells exhibit lower trap-state density and stronger carrier migration capability, leading to enhanced power conversion efficiency and stability.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Hulya Ozturk Dogan, Fatma Yildirim, Zeynep Orhan, Ali Ben Ahmed, Mostefa Benhaliliba, Sakir Aydogan
Summary: In this study, efficient self-powered visible and UV photodetectors based on hybrid organic-inorganic materials were demonstrated. The photodetectors showed excellent UV detecting capability and good photoresponsivity.
ORGANIC ELECTRONICS
(2024)
