A Wide Bandgap Halide Perovskite Based Self-Powered Blue Photodetector with 84.9% of External Quantum Efficiency

Yeonghun Yun; Gill Sang Han; Gyu Na Park; Jihyun Kim; Jinhong Park; Devthade Vidyasagar; Jina Jung; Won Chang Choi; Young Jin Choi; Kwang Heo; Joohoon Kang; Ji Sang Park; Hyun Suk Jung; Sangwook Lee

doi:10.1002/adma.202206932

A Wide Bandgap Halide Perovskite Based Self-Powered Blue Photodetector with 84.9% of External Quantum Efficiency

Yeonghun Yun, Gill Sang Han, Gyu Na Park, Jihyun Kim, Jinhong Park, Devthade Vidyasagar, Jina Jung, Won Chang Choi, Young Jin Choi, Kwang Heo, Joohoon Kang, Ji Sang Park, Hyun Suk Jung, Sangwook Lee

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12 Scopus citations

Abstract

A self-powered, color-filter-free blue photodetector (PD) based on halide perovskites is reported. A high external quantum efficiency (EQE) of 84.9%, which is the highest reported EQE in blue PDs, is achieved by engineering the A-site monovalent cations of wide-bandgap perovskites. The optimized composition of formamidinium (FA)/methylammonium (MA) increases the heat of formation, yielding a uniform and smooth film. The incorporation of Cs⁺ ions into the FA/MA composition suppresses the trap density and increases charge-carrier mobility, yielding the highest average EQE of 77.4%, responsivity of 0.280 A W⁻¹, and detectivity of 5.08 × 10¹² Jones under blue light. Furthermore, Cs⁺ improves durability under repetitive operations and ambient atmosphere. The proposed device exhibits peak responsivity of 0.307 A W⁻¹, which is higher than that of the commercial InGaN-based blue PD (0.289 A W⁻¹). This study will promote the development of next-generation image sensors with vertically stacked perovskite PDs.

Original language	English
Article number	2206932
Journal	Advanced Materials
Volume	34
Issue number	51
DOIs	https://doi.org/10.1002/adma.202206932
State	Published - 22 Dec 2022

Keywords

blue photodetectors
compositional engineering
halide perovskites
image sensors
wide-bandgap materials

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10.1002/adma.202206932

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title = "A Wide Bandgap Halide Perovskite Based Self-Powered Blue Photodetector with 84.9% of External Quantum Efficiency",

abstract = "A self-powered, color-filter-free blue photodetector (PD) based on halide perovskites is reported. A high external quantum efficiency (EQE) of 84.9%, which is the highest reported EQE in blue PDs, is achieved by engineering the A-site monovalent cations of wide-bandgap perovskites. The optimized composition of formamidinium (FA)/methylammonium (MA) increases the heat of formation, yielding a uniform and smooth film. The incorporation of Cs+ ions into the FA/MA composition suppresses the trap density and increases charge-carrier mobility, yielding the highest average EQE of 77.4%, responsivity of 0.280 A W−1, and detectivity of 5.08 × 1012 Jones under blue light. Furthermore, Cs+ improves durability under repetitive operations and ambient atmosphere. The proposed device exhibits peak responsivity of 0.307 A W−1, which is higher than that of the commercial InGaN-based blue PD (0.289 A W−1). This study will promote the development of next-generation image sensors with vertically stacked perovskite PDs.",

keywords = "blue photodetectors, compositional engineering, halide perovskites, image sensors, wide-bandgap materials",

author = "Yeonghun Yun and Han, {Gill Sang} and Park, {Gyu Na} and Jihyun Kim and Jinhong Park and Devthade Vidyasagar and Jina Jung and Choi, {Won Chang} and Choi, {Young Jin} and Kwang Heo and Joohoon Kang and Park, {Ji Sang} and Jung, {Hyun Suk} and Sangwook Lee",

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T1 - A Wide Bandgap Halide Perovskite Based Self-Powered Blue Photodetector with 84.9% of External Quantum Efficiency

AU - Yun, Yeonghun

AU - Han, Gill Sang

AU - Park, Gyu Na

AU - Kim, Jihyun

AU - Park, Jinhong

AU - Vidyasagar, Devthade

AU - Jung, Jina

AU - Choi, Won Chang

AU - Choi, Young Jin

AU - Heo, Kwang

AU - Kang, Joohoon

AU - Park, Ji Sang

AU - Jung, Hyun Suk

AU - Lee, Sangwook

PY - 2022/12/22

Y1 - 2022/12/22

N2 - A self-powered, color-filter-free blue photodetector (PD) based on halide perovskites is reported. A high external quantum efficiency (EQE) of 84.9%, which is the highest reported EQE in blue PDs, is achieved by engineering the A-site monovalent cations of wide-bandgap perovskites. The optimized composition of formamidinium (FA)/methylammonium (MA) increases the heat of formation, yielding a uniform and smooth film. The incorporation of Cs+ ions into the FA/MA composition suppresses the trap density and increases charge-carrier mobility, yielding the highest average EQE of 77.4%, responsivity of 0.280 A W−1, and detectivity of 5.08 × 1012 Jones under blue light. Furthermore, Cs+ improves durability under repetitive operations and ambient atmosphere. The proposed device exhibits peak responsivity of 0.307 A W−1, which is higher than that of the commercial InGaN-based blue PD (0.289 A W−1). This study will promote the development of next-generation image sensors with vertically stacked perovskite PDs.

AB - A self-powered, color-filter-free blue photodetector (PD) based on halide perovskites is reported. A high external quantum efficiency (EQE) of 84.9%, which is the highest reported EQE in blue PDs, is achieved by engineering the A-site monovalent cations of wide-bandgap perovskites. The optimized composition of formamidinium (FA)/methylammonium (MA) increases the heat of formation, yielding a uniform and smooth film. The incorporation of Cs+ ions into the FA/MA composition suppresses the trap density and increases charge-carrier mobility, yielding the highest average EQE of 77.4%, responsivity of 0.280 A W−1, and detectivity of 5.08 × 1012 Jones under blue light. Furthermore, Cs+ improves durability under repetitive operations and ambient atmosphere. The proposed device exhibits peak responsivity of 0.307 A W−1, which is higher than that of the commercial InGaN-based blue PD (0.289 A W−1). This study will promote the development of next-generation image sensors with vertically stacked perovskite PDs.

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A Wide Bandgap Halide Perovskite Based Self-Powered Blue Photodetector with 84.9% of External Quantum Efficiency

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