Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/139200
Title: Stable, high-sensitivity and fast-response photodetectors based on lead-free Cs2AgBiBr6 double perovskite films
Authors: Yang, Jie
Bao, Chunxiong
Ning, Weihua
Wu, Bo
Ji, Fuxiang
Yan, Zhibo
Tao, Youtian
Liu, Jun-Ming
Sum, Tze Chien
Bai, Sai
Wang, Jianpu
Huang, Wei
Zhang, Wenjing
Gao, Feng
Keywords: Science::Physics
Issue Date: 2019
Source: Yang, J., Bao, C., Ning, W., Wu, B., Ji, F., Yan, Z., . . . Gao, F. (2019). Stable, high-sensitivity and fast-response photodetectors based on lead-free Cs2AgBiBr6 double perovskite films. Advanced Optical Materials, 7(13), 1801732-. doi:10.1002/adom.201801732
Journal: Advanced Optical Materials
Abstract: Solution-processed metal halide perovskites (MHPs) have demonstrated great advances on achieving high-performance photodetectors. However, the intrinsic material instability and the toxicity of lead still hinder the practical applications of MHPs-based photodetectors. In this work, the first highly sensitive and fast-response lead-free perovskite photodetectors based on Cs2AgBiBr6 double perovskite films are demonstrated. A convenient solution method is developed to deposit high-quality Cs2AgBiBr6 film with large grain sizes, low trap densities, and long charge carrier lifetimes. Incorporated within a photodiode device architecture comprised of optimized hole- and electron-transporting layers, lead-free perovskite photodetectors are achieved exhibiting a high detectivity of 3.29 × 1012 Jones, a large linear dynamic range of 193 dB, and a fast response time of ≈17 ns. All the key figures of merit of the devices are comparable with the reported best-performing photodetectors based on lead halide perovskites. In addition, the resulting devices exhibit excellent thermal and environmental stability. The nonencapsulated devices show negligible degradation after thermal stressing at 150 °C and less than 5% degradation in the photoresponsivity after storage in ambient air for ≈2300 h. The results demonstrate the great potential of the lead-free Cs2AgBiBr6 double perovskite in applications for environmentally friendly and high-performance photodetectors.
URI: https://hdl.handle.net/10356/139200
ISSN: 2195-1071
DOI: 10.1002/adom.201801732
Rights: This is the peer reviewed version of the following article: Yang, J., Bao, C., Ning, W., Wu, B., Ji, F., Yan, Z., . . . Gao, F. (2019). Stable, high-sensitivity and fast-response photodetectors based on lead-free Cs2AgBiBr6 double perovskite films. Advanced Optical Materials, 7(13), 1801732-, which has been published in final form at https://doi.org/10.1002/adom.201801732. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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