Volume 17, Issue 40 2102987
Research Article

Highly Sensitive Ultraviolet and Visible Wavelength Sensor Composed of Two Identical Perovskite Nanofilm Photodetectors

Feng-Xia Liang

Feng-Xia Liang

School of Materials Science and Engineering and Anhui Provincial Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, 230009 China

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Rong-Yu Fan

Rong-Yu Fan

School of Materials Science and Engineering and Anhui Provincial Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, 230009 China

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Jing-Yue Li

Jing-Yue Li

School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, 230009 China

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Can Fu

Can Fu

School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, 230009 China

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Jing-Jing Jiang

Jing-Jing Jiang

School of Materials Science and Engineering and Anhui Provincial Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, 230009 China

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Ting Fang

Ting Fang

School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, 230009 China

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Di Wu

Di Wu

School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052 China

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Lin-Bao Luo

Corresponding Author

Lin-Bao Luo

School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, 230009 China

E-mail: [email protected]

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First published: 25 August 2021
Citations: 11

Abstract

This work reports the design of a wavelength sensor composed of two identical perovskite (FA0.85Cs0.15PbI3) photodetectors (PDs) that are capable of discriminating incident wavelength in a quantitative way. Due to strong wavelength-dependent absorption coefficient, the penetration depth of the photons in the FA0.85Cs0.15PbI3 nanofilms increases with the increasing wavelength, leading to a gradual decrease of photo-generated current for PD1, but an increase of photocurrent in PD2, according to the theoretical simulation of Technology Computer Aided Design. This special evolution of photo-generated current as a function of wavelength facilitates the quantitative determination of the wavelength since the current ratio of both PDs monotonously decreases with the increase of wavelength from 265 to 810 nm. The average absolute error and the average relative error are estimated to be 7.6 nm and 1.68%, respectively, which are much better than other semiconductors materials-based wavelength sensors previously reported. It is believed that the present perovskite film-based wavelength sensor will have potential application in the future color/spectrum optoelectronic devices.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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