Zhe Kang1, Yongfa Cheng1, Zhi Zheng1, Feng Cheng1, Ziyu Chen1, Luying Li1, Xinyu Tan2, Lun Xiong3, Tianyou Zhai1, Yihua Gao4,5. 1. Center for Nanoscale Characterization and Devices (CNCD) Wuhan National Laboratory for Optoelectronics (WNLO) and School of Physics and School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Luoyu Road 1037, Wuhan, 430074, People's Republic of China. 2. College of Materials and Chemical Engineering, China Three Gorges University, Daxue Road 8, Yichang, 443002, People's Republic of China. tanxin@ctgu.edu.cn. 3. Hubei Key Laboratory of Optical Information and Pattern Recognition, School of Optical Information and Energy Engineering, School of Mathematics and Physics, Wuhan Institute of Technology, Guanggu 1st Road 206, Wuhan, 430205, People's Republic of China. 4. Center for Nanoscale Characterization and Devices (CNCD) Wuhan National Laboratory for Optoelectronics (WNLO) and School of Physics and School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Luoyu Road 1037, Wuhan, 430074, People's Republic of China. gaoyihua@hust.edu.cn. 5. Hubei Key Laboratory of Optical Information and Pattern Recognition, School of Optical Information and Energy Engineering, School of Mathematics and Physics, Wuhan Institute of Technology, Guanggu 1st Road 206, Wuhan, 430205, People's Republic of China. gaoyihua@hust.edu.cn.
Abstract
Self-powered devices are widely used in the detection and sensing fields. Asymmetric metal contacts provide an effective way to obtain self-powered devices. Finding two stable metallic electrode materials with large work function differences is the key to obtain highly efficient asymmetric metal contacts structures. However, common metal electrode materials have similar and high work functions, making it difficult to form an asymmetric contacts structure with a large work function difference. Herein, Mo2C crystals with low work function (3.8 eV) was obtained by chemical vapor deposition (CVD) method. The large work function difference between Mo2C and Au allowed us to synthesize an efficient Mo2C/MoS2/Au photodetector with asymmetric metal contact structure, which enables light detection without external electric power. We believe that this novel device provides a new direction for the design of miniature self-powered photodetectors. These results also highlight the great potential of ultrathin Mo2C prepared by CVD in heterojunction device applications.
Self-powered devices are widely used in tn class="Chemical">he detectionpan> and senpan>n class="Chemical">sing fields. Asymmetric metal contacts provide an effective way to obtain self-powered devices. Finding two stable metallic electrode materials with large work function differences is the key to obtain highly efficient asymmetric metal contacts structures. However, common metal electrode materials have similar and high work functions, making it difficult to form an asymmetric contacts structure with a large work function difference. Herein, Mo2C crystals with low work function (3.8 eV) was obtained by chemical vapor deposition (CVD) method. The large work function difference between Mo2C and Au allowed us to synthesize an efficient Mo2C/MoS2/Au photodetector with asymmetric metal contact structure, which enables light detection without external electric power. We believe that this novel device provides a new direction for the design of miniature self-powered photodetectors. These results also highlight the great potential of ultrathinMo2C prepared by CVD in heterojunction device applications.
Entities:
Keywords:
Asymmetric metal contacts; Chemical vapor deposition; Mo2C; MoS2; Photodetector
Authors: N M A Hadia; Mohammed A H Khalafalla; Fatma M Abdel Salam; Ashour M Ahmed; Mohamed Shaban; Aljawhara H Almuqrin; Ali Hajjiah; H A Hanafi; Mansoor Alruqi; Abdel-Hamid I Mourad; Mohamed Rabia Journal: Polymers (Basel) Date: 2022-05-25 Impact factor: 4.967
Authors: N M A Hadia; Ahmed Adel A Abdelazeez; Meshal Alzaid; Mohamed Shaban; S H Mohamed; Bram Hoex; Ali Hajjiah; Mohamed Rabia Journal: Materials (Basel) Date: 2022-02-16 Impact factor: 3.623