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

Hok Leung Loi; Jiupeng Cao; Xuyun Guo; Chun Ki Liu; Naixiang Wang; Jiajun Song; Guanqi Tang; Ye Zhu; Feng Yan

doi:10.1002/advs.202000776

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

Hok Leung Loi
, Jiupeng Cao
, Xuyun Guo
, Chun Ki Liu
, Naixiang Wang
, Jiajun Song
, Guanqi Tang
, Ye Zhu
, Feng Yan

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

78 Citations (Scopus)

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)₂(MA)_n ₋₁Pb_nI₃ _n ₊₁ perovskite thin films is designed and fabricated by a convenient hot-casting method to obtain gradient n 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⁻¹ and a specific detectivity of 2 × 10¹² 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.

Original language	English
Article number	2000776
Journal	Advanced Science
Volume	7
Issue number	14
DOIs	https://doi.org/10.1002/advs.202000776
Publication status	Published - 1 Jul 2020

Keywords

2D perovskites
hot-casting
perovskites
photodetectors
vertical heterojunctions

ASJC Scopus subject areas

Medicine (miscellaneous)
General Chemical Engineering
Biochemistry, Genetics and Molecular Biology (miscellaneous)
General Materials Science
General Engineering
General Physics and Astronomy

More information

10.1002/advs.202000776

http://hdl.handle.net/10397/87799

Cite this

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title = "Gradient 2D/3D Perovskite Films Prepared by Hot-Casting for Sensitive Photodetectors",

abstract = "2D Ruddlesden{\textendash}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)2(MA)n −1PbnI3 n +1 perovskite thin films is designed and fabricated by a convenient hot-casting method to obtain gradient n 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−1 and a specific detectivity of 2 {\texttimes} 1012 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.",

keywords = "2D perovskites, hot-casting, perovskites, photodetectors, vertical heterojunctions",

author = "Loi, \{Hok Leung\} and Jiupeng Cao and Xuyun Guo and Liu, \{Chun Ki\} and Naixiang Wang and Jiajun Song and Guanqi Tang and Ye Zhu and Feng Yan",

year = "2020",

month = jul,

day = "1",

doi = "10.1002/advs.202000776",

language = "English",

volume = "7",

journal = "Advanced Science",

issn = "2198-3844",

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T1 - Gradient 2D/3D Perovskite Films Prepared by Hot-Casting for Sensitive Photodetectors

AU - Loi, Hok Leung

AU - Cao, Jiupeng

AU - Guo, Xuyun

AU - Liu, Chun Ki

AU - Wang, Naixiang

AU - Song, Jiajun

AU - Tang, Guanqi

AU - Zhu, Ye

AU - Yan, Feng

PY - 2020/7/1

Y1 - 2020/7/1

N2 - 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)2(MA)n −1PbnI3 n +1 perovskite thin films is designed and fabricated by a convenient hot-casting method to obtain gradient n 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−1 and a specific detectivity of 2 × 1012 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.

AB - 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)2(MA)n −1PbnI3 n +1 perovskite thin films is designed and fabricated by a convenient hot-casting method to obtain gradient n 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−1 and a specific detectivity of 2 × 1012 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.

KW - 2D perovskites

KW - hot-casting

KW - perovskites

KW - photodetectors

KW - vertical heterojunctions

UR - https://www.scopus.com/pages/publications/85085559951

U2 - 10.1002/advs.202000776

DO - 10.1002/advs.202000776

M3 - Journal article

AN - SCOPUS:85085559951

SN - 2198-3844

VL - 7

JO - Advanced Science

JF - Advanced Science

IS - 14

M1 - 2000776

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

More information

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