Article
Chemistry, Multidisciplinary
Youwei Zhang, Kankan Ma, Chun Zhao, Wei Hong, Changjiang Nie, Zhi-Jun Qiu, Shun Wang
Summary: This study demonstrates a lateral p-i-n homojunction photodiode based on multilayer WSe2, showing ideal rectifying behavior and excellent photodetecting performance, as well as record-breaking response time and bandwidth. The diode is formed through selective doping and surface plasma treatment, and holds potential for future applications in self-powered high-frequency weak signal photodetection.
Article
Nanoscience & Nanotechnology
Sikandar Aftab, Hafiz Muhammad Salman Ajmal, Ehsan Elahi, Hafiz Muhammad Mansoor Ul Hague, Samiya, Muhammad Waqas Iqbal, Jamal Aziz, Saqlain Yousuf, Muhammad Zahir Iqbal, Muhammad Arslan Shehzad
Summary: This study demonstrates the possibility of constructing high-performance high-speed electronic devices using a single two-dimensional semiconductor through carrier type band modulation. By sandwiching two different polarities of two-dimensional semiconductors between an intrinsic FET, a p-i-n homojunction diode is successfully fabricated, showing ideal rectifying behavior and excellent photodetection performance.
ACS APPLIED NANO MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Aseel S. Jasim, Odai N. Salman
Summary: This study aimed to prepare transparent defective p-type TiO2 films via the hydrothermal method by introducing metal vacancies (V-Ti) into undoped oxide, resulting in the formation of a p-n homojunction diode. The defective TiO2 films exhibited p-type conductivity and high charge mobility. The influence of growth time on the morphological, structural, and optical properties of TiO2 nanorods was analyzed using FESEM, XRD, XPS, and UV-VIS methods. The results showed that the films had a grass-like nanostructure and a stoichiometry ratio of Ti to O of 2:1. The optical properties of the films were investigated, revealing changes in transmittance, absorbance, and energy gap with varying growth times. The p-n homojunction exhibited distinct diode-like behavior. These findings have significant implications for the development of metal-oxide solar cells, photo-catalysts, LEDs, photodiodes, and photo-electrochemical devices.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Nanoscience & Nanotechnology
Hai Yen Le Thi, Tien Dat Ngo, Nhat Anh Nguyen Phan, Hoseong Shin, Inayat Uddin, A. Venkatesan, Chi-Te Liang, Nobuyuki Aoki, Won Jong Yoo, Kenji Watanabe, Takashi Taniguchi, Gil-Ho Kim
Summary: In this study, a facile and doping-free approach based on contact engineering of tungsten di-selenide was proposed to form a lateral p-n homojunction photovoltaic material. The experimental results demonstrated the great potential of this technique for next-generation optoelectronic devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Multidisciplinary Sciences
S. Aboulhadeed, M. Ghali, M. M. Ayad
Summary: This article introduces a homojunction p-n diode device based solely on PEDOT:PSS thin films, which exhibits nonlinear I-V behavior.
SCIENTIFIC REPORTS
(2022)
Article
Electrochemistry
Maiji Zhang, Zhenzhu Wang, Jiangfeng Ni, Liang Li
Summary: This work introduces the concept of homojunction into the design of sodium anodes, which are capable of storing a large amount of Na+ ions reversibly. The use of TiO2 nanowires composed of both anatase and bronze phases brings abundant boundaries and interfaces, increasing the storage sites and facilitating the transport of Na+ ions. The practice of TiO2 homojunction paired with Na3V2(PO4)(2)O2F cathode demonstrates the potential of homojunction as a promising materials strategy in rechargeable batteries.
BATTERIES & SUPERCAPS
(2022)
Article
Materials Science, Multidisciplinary
Jun-Ding Zheng, Yi-Feng Zhao, Zhi-Qiang Bao, Yu-Hao Shen, Zhao Guan, Ni Zhong, Fang-Yu Yue, Ping-Hua Xiang, Chun-Gang Duan
Summary: Recently, the two-dimensional in-plane ferroelectric materials group-IV monochalcogenides MX (M = Ge, Sn; X = S, Se) have attracted much attention due to their rich physical properties. This study focuses on the flexoelectric effect on the electronic, optical and transport properties in monolayer germanium selenide (GeSe), and finds that bending can be used to fabricate p-n homojunctions.
Review
Chemistry, Multidisciplinary
Yanan Sun, Wei Chen, Zhengyi Sun
Summary: This review discusses the characteristics and applications of organic metal halide perovskite materials in solar cells. By analyzing different types of perovskite materials and device architectures, innovative ideas are proposed to simplify the manufacturing process, reduce costs, and improve efficiency, thereby accelerating the commercialization of perovskite solar cells.
CHINESE CHEMICAL LETTERS
(2022)
Article
Multidisciplinary Sciences
Liangbo Xie, Pengfei Wang, Yi Li, Dongpeng Zhang, Denghui Shang, Wenwen Zheng, Yuguo Xia, Sihui Zhan, Wenping Hu
Summary: The authors propose a nitrogen doping strategy for selective electrocatalytic singlet oxygen production. By using this strategy, the selectivity and activity of O-1(2) production can be significantly improved.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Yaoxin Ding, Danni Xue, Hanzhou Yu, Jie Shen
Summary: Mo/N co-doped TiO2 nanotube array films were prepared using magnetron sputtering and anodization. The effects of doping concentration and nanotube morphology on the structure, morphology, elemental composition, light-absorption capacity, and optoelectronic properties of TiO2 nanotubes were investigated. The results showed that Mo primarily incorporated into the TiO2 lattice in the Mo6+ valence state, while N was mainly embedded into the lattice as interstitial atoms. Also, the Mo/N co-doped TiO2 nanotube array films exhibited the best photovoltaic performance with a photogenerated current of 0.50 μA/cm(2), which was 5.5 times higher than that of Mo-doped TiO2. This enhancement in photocatalytic efficiency can be attributed to the increased concentration of photogenerated electrons and holes, reduced band gap width, and intense light absorption within the visible spectrum.
Article
Nanoscience & Nanotechnology
Yi Shen, Shasha Liu, Lun Lu, Chao Zhu, Qile Fang, Renlan Liu, Zhiqiao He, Yungui Li, Shuang Song
Summary: In this study, nanoscale TiO2 materials with different types of vacancies were synthesized and it was found that pn-TiO2 containing dual vacancies exhibited higher photocatalytic activity for gaseous toluene removal. The dual vacancies in pn-TiO2 enabled the full utilization of the valence and conduction bands to generate free radicals, leading to synergistic degradation of VOCs, providing a new pathway for catalyst design.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Xiang Ding, Hao Shao, Hongxia Wang, Weidong Yang, Jian Fang, Daquan Zhang, Tong Lin
Summary: The use of a nanocomposite material made from polypyrrole and titanium dioxide nanoparticles has significantly improved the electrical output of a Schottky DC generator, achieving higher current output, power density, and energy conversion efficiency. This novel approach may lead to the development of high-performance Schottky DC generators.
Article
Chemistry, Physical
Jinsong Li, Jing Ao, Chongxia Zhong, Tan Yin
Summary: Researchers have developed a TiO2-CNT supercapacitor with high energy density and specific capacitance. The device shows excellent cyclic stability and low leakage current, making it suitable for power supply of portable electronics in the future.
APPLIED SURFACE SCIENCE
(2021)
Article
Polymer Science
Chunlian Liu, Peipei Huang, Wei Wang, Miao Tan, Fangbao Fu, Yunhui Feng
Summary: In this study, composite nanomaterials of TiO2 nanotube arrays (TiO2 NTAs) and polyaniline (PANI) were successfully prepared on titanium sheets using an anodic oxidation electrochemical method. The TiO2 NTA/PANI composite materials exhibited excellent UV photosensitivity and responsiveness, as well as good stability and reproducibility. The p-n heterostructure formed inside the composites hindered the recombination of photogenerated electron-hole pairs and improved their utilization of UV light. This work provides a theoretical basis for the application of metal oxides in UV photodetectors, which is important for the development of UV photodetectors.
Article
Chemistry, Multidisciplinary
Yuxin Liu, Cailing Chen, Yiqiang He, Zhe Zhang, Mingbian Li, Chunguang Li, Xiao-Bo Chen, Yu Han, Zhan Shi
Summary: This study developed a one-pot preparation strategy to significantly enhance photocatalytic activity by creating rich indium vacancies in In2S3 materials. The formation of an atomic p-n homojunction further improved the photocatalytic performance. The photocatalysts exhibited multi-functional properties and achieved high efficiency in hydrogen production, methyl orange degradation, and reduction of heavy metal ions under simulated sunlight.
