Gradient 2D/3D Perovskite Films Prepared by Hot-Casting for Sensitive Photodetectors

Overview

Journal Adv Sci (Weinh)

Specialty Biomedical Engineering

Date 2020 Jul 28

PMID 32714769

Citations 10

Authors

Hok-Leung Loi

Jiupeng Cao

Xuyun Guo

Chun-Ki Liu

Naixiang Wang

Jiajun Song

Guanqi Tang

Ye Zhu

Feng Yan

Affiliations

Soon will be listed here.

Abstract

2D Ruddlesden-Popper perovskites have attracted wide attention recently because of tunable optoelectronic properties and have been used as alternatives to their 3D counterparts in various optoelectronic devices. Here, a series of (PEA)(MA) Pb I perovskite thin films is designed and fabricated by a convenient hot-casting method to obtain gradient in the films, which leads to the formation of vertical heterojunctions that can enhance charge separation in the films under light illumination. Based on a single gradient perovskite film, a highly sensitive and stable photodetector with a responsivity up to 149 AW and a specific detectivity of 2 × 10 Jones is obtained. This work paves a way to realizing high-performance optoelectronic devices with enhanced charge separation by introducing compositional gradient in a perovskite film.

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