Perovskite colloidal quantum-dot enhanced graphene/silicon heterojunction with improved ultraviolet response

Yimei Tan, Ge Mu*, Tianyu Rao, Yuning Luo, Pengfei Zhao, Menglu Chen*, Xin Tang*

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

6 引用 (Scopus)

摘要

Silicon (Si) is a mature semiconductor detection material because of its appropriate bandgap, high reliability, and low-cost manufacturing process. However, the detection range of Si-based photodetectors is mainly restricted to visible and near-infrared (NIR) ranges. Broadening the detection range of Si-based detectors to ultraviolet (UV) could ignite numerous applications, including flame detection, defense safety, and environmental monitoring. Here, the obtained perovskite colloidal quantum dots (QDs) with high quality are integrated with a Si/graphene heterojunction to broaden and improve response. By the electrical coupling mechanism between graphene and QDs, the built-in potential in detectors is maximized. As a result, the devices exhibit a high UV responsivity of 0.33 A W-1 at 210 nm, 0.73 A W-1 at 400 nm, and a superior detectivity of nearly 1012 Jones under the UV region. Aside from that, the performance of devices under visible and NIR ranges is also dramatically improved compared to that of the one without perovskite QDs.

源语言英语
文章编号051102
期刊Applied Physics Letters
122
5
DOI
出版状态已出版 - 30 1月 2023

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