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- Title
Phototransistors Based on Organic Small Molecules–Ruddlesden‐Popper Layered Perovskite Single Crystal Heterojunctions.
- Authors
Sun, Huijuan; Liu, Hui; Liu, Fengjing; Liu, Hao; Jiang, Chao; Zhang, Yiwei
- Abstract
In photodetectors based on heterojunctions of organic semiconductor and hybrid perovskite, the strong light absorbing ability of perovskite and the gate‐tunability of organic semiconductor can be preferably incorporated. However, the charge current transfer at the interface, and the double channel transportation in the heterojunctions are not fully understood. The authors successfully transfer the mechanically exfoliated Ruddlesden–Popper (RP) layered perovskite single crystal to the thermal evaporated organic small molecule semiconductor forming a heterojunction. Based on the heterojunction, two configurations of light detecting devices are prepared in which the perovskite layer acts as either a conducting channel and light absorbing layer or light absorbing layer only. The light detecting performance of such devices is systematically investigated. The charge transfer from the perovskite single crystal to the organic semiconductor layer is observed by Kelvin Probe Force Microscope characterization. They also find that the n values of the RP layered perovskite can significantly influence the property of the heterojunction and charge transfer process. For single channel devices a responsivity of 5.87 × 102 A W−1 and a detectivity of 5.13 × 1012 Jones is realized.
- Subjects
SINGLE crystals; HETEROJUNCTIONS; ORGANIC semiconductors; ORGANIC bases; PHOTOTRANSISTORS; PEROVSKITE; CHARGE transfer
- Publication
Advanced Materials Interfaces, 2022, Vol 9, Issue 7, p1
- ISSN
2196-7350
- Publication type
Article
- DOI
10.1002/admi.202101850