| Title | High-Performance Quasi-2D Perovskite/Single-Walled Carbon Nanotube Phototransistors for Low-Cost and Sensitive Broadband Photodetection |
| Authors | Liu, Chun-Ki Loi, Hok-Leung Cao, Jiupeng Tang, Guanqi Liu, Fang Huang, Qi Liang, Xuelei Yan, Feng |
| Affiliation | Hong Kong Polytech Univ, Dept Appl Phys, Hung Hom, Kowloon, Hong Kong, Peoples R China Peking Univ, Key Lab Phys & Chem Nanodevices, Beijing 100871, Peoples R China Peking Univ, Ctr Carbon Based Elect, Dept Elect, Beijing 100871, Peoples R China |
| Keywords | HYBRID GRAPHENE |
| Issue Date | Feb-2021 |
| Publisher | SMALL STRUCTURES |
| Abstract | Quasi-2D Ruddlesden-Popper perovskites (RPPs) have emerged as promising functional materials for optoelectronics due to the highly tunable optoelectronic properties and have been considered as alternative candidates for semiconductors in photodetectors. However, RPPs normally show low carrier mobilities, which is unfavorable for the performance of photodetectors. Herein, a solution-processed hybrid phototransistor based on RPP/single-walled carbon nanotube (SWCNT) heterostructure is reported. A vertical composition gradient is formed upon RPP film preparation, which leads to a gradient type-II heterojunction in the film. More importantly, the high carrier mobility of SWCNTs can result in ultrahigh responsivity and detectivity of 2 x 10(6) A W-1 and 7 x 10(14) Jones, respectively. In addition, high on/off ratio of approximate to 10(3) can be achieved in the phototransistors. Herein, the high potential of RPP/SWCNT hybrid phototransistors as next-generation photodetectors with superior sensitivity is demonstrated. |
| URI | http://hdl.handle.net/20.500.11897/634397 |
| DOI | 10.1002/sstr.202000084 |
| Indexed | ESCI |
| Appears in Collections: | 纳米器件物理与化学教育部重点实验室 信息科学技术学院 |
