Maity, Avisek and Raychaudhuri, A K and Ghosh, Barnali (2021) Paper-Based Stable Broad Band Optical Detector Made from Mixed Cation Organic Perovskite Halides. Journal of Physical Chemistry C, 125 (19). pp. 10646-10652. ISSN 1932-7447

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We report a paper-based photodetector made from mixed cation organic perovskite halide MA(1-x)FA(x)PbI(3) (MA = methylammonium (CH3NH3); FA = formamidium CH(NH2)(2)). The detector shows a substantial photogain and photoresponse at low illumination intensity (<10 mu W/cm(2)) and a broad band response that extends from 300 to 800 nm at the optimum substitutional level with x = 0.4. A peak responsivity of 0.27 A/W in the paper photodetector was observed at a wavelength of similar to 775 nm at a bias of 5 V. The responsivity stayed above 0.1 A/W for a broad optical wavelength range of 550 to 825 nm that covers a good range of the visible spectra. The detector has a low dark current (<10(-9) A) at highest bias of operation and an rms current noise of <= 10 pA. The mixed halide detector was grown on conventional paper using a one-pot chemical process. The detector reported here is stable at a room ambience and does not deteriorate under prolonged exposure to illumination. It combines the high response of MAPbI(3) and the stability of FAPbI(3). The paper photodetector is useful in a number of applications needing flexible and disposable detectors, and the power requirement even at full operation is <0.5 mu W at a low bias (<5 V) making it compatible with battery-powered operation.

Item Type: Article
Subjects: Engineering Materials
Depositing User: Bidhan Chaudhuri
Date Deposited: 16 Dec 2021 12:21
Last Modified: 16 Dec 2021 12:21

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