期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 29, 页码 34625-34636出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c09642
关键词
perovskite; heterojunction; photodetector; narrowband; self-powered
资金
- National Nature Science Foundation of China [11704094, 51972094]
- Nature Science Foundation of Hebei Province [F2019201047, F2018201198]
- Science and Technology Plan Project of Hebei Province [216Z1703G]
By combining organic-inorganic hybrid perovskite layers of different band gaps and thicknesses, a series of narrowband perovskite heterojunction photodetectors with adjustable spectral range have been designed and prepared, showing excellent photoresponse performances and self-powered properties.
In recent years, narrowband photodetectors (PDs) have been widely used in color imaging, spectral detection or discrimination, defense, and scientific research due to their special spectral selective responses. In this work, by combining organic-inorganic hybrid perovskite layers of different band gaps and thicknesses, a series of narrowband perovskite heterojunction PDs with a continuously adjustable spectral range in the visible and near-infrared range are designed and prepared. The PDs can achieve a narrowband photoresponse with a full width at half-maximum (FWHM) of less than 50 nm and a light rejection ratio (between 780 and 532 nm) of over 1100 and exhibit excellent photoresponse performances with an external quantum efficiency (EQE), responsivity (R), and detectivity (D*) as high as 50.3%, 0.331 A/W, and 4.27 X 10(10) Jones, respectively. More importantly, the photoresponses of the PDs at zero bias are as good as those at the reverse bias voltages, indicating the outstanding self-powered property. In addition, a fast response time of similar to 180/similar to 200 mu s is obtained in the narrowband perovskite heterojunction, and the response speed nearly remains constant for different PDs in the whole tunable wavelength range, demonstrating the suitable and stable structure of the heterojunction, as well as the high crystalline quality of the perovskite layers. This work definitely provides a simple strategy for designing low-cost, high-photoresponsivity, fast speed, and self-powered narrowband PDs with a tunable spectral range.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据