Near-Infrared and short-wavelength infrared photodiodes based on dye-perovskite composites

Martinez Maestro, L ORCID:, Qianqian, L, Wang, Y, Young, M, Patel, JB, Milot, RL, Lunt, RR, Snaith, HJ, Johnston, MB and Herz, LM 2017, 'Near-Infrared and short-wavelength infrared photodiodes based on dye-perovskite composites' , Advanced Functional Materials, 27 (38) .

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Organohalide perovskites have emerged as promising light‐sensing materials because of their superior optoelectronic properties and low‐cost processing methods. Recently, perovskite‐based photodetectors have successfully been demonstrated as both broadband and narrowband varieties. However, the photodetection bandwidth in perovskite‐based photodetectors has so far been limited to the near‐infrared regime owing to the relatively wide band gap of hybrid organohalide perovskites. In particular, short‐wavelength infrared photodiodes operating beyond 1 µm have not yet been realized with organohalide perovskites. In this study, narrow band gap organic dyes are combined with hybrid perovskites to form composite films as active photoresponsive layers. Tuning the dye loading allows for optimization of the spectral response characteristics and excellent charge‐carrier mobilities near 11 cm2 V−1 s−1, suggesting that these composites combine the light‐absorbing properties or IR dyes with the outstanding charge‐extraction characteristics of the perovskite. This study demonstrates the first perovskite photodiodes with deep near‐infrared and short‐wavelength infrared response that extends as far as 1.6 µm. All devices are solution‐processed and exhibit relatively high responsivity, low dark current, and fast response at room temperature, making this approach highly attractive for next‐generation light‐detection techniques.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Advanced Functional Materials
Publisher: John Wiley & Sons
ISSN: 1616-301X
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Funders: Engineering and Physical Sciences Research Council (EPSRC) U.K, European Commission Horizon 2020 Framework (INFORM ITN).
Depositing User: L Martinez Maestro
Date Deposited: 05 Dec 2019 15:30
Last Modified: 16 Feb 2022 03:33

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