Harnessing Strong Band-Filling in Mixed Pb-Sn Perovskites Boosts the Performance of Concentrator-Type Photovoltaics

Hongki Kim; Gi Rim Han; Seong Keun Kim; Taecheon Lyu; Wonbin Choi; Jong Woo Lee; Joon Hak Oh

doi:10.1021/acsenergylett.2c02791

Harnessing Strong Band-Filling in Mixed Pb-Sn Perovskites Boosts the Performance of Concentrator-Type Photovoltaics

Hongki Kim, Gi Rim Han, Seong Keun Kim, Taecheon Lyu, Wonbin Choi, Jong Woo Lee, Joon Hak Oh

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

The need for cutting-edge solar power generation has led to the rapid development of organic-inorganic hybrid perovskites with unique photophysical properties. Photoinduced band-filling by free charge carriers, which is a consequence of the dynamic filling of the densities of states, modulates the optical transition toward high energy. Here, we observe strong band-filling in FA_0.5MA_0.5Pb_0.5Sn_0.5I₃ polycrystalline films under continuous-wave excitation, which is much more evident than that in typical MAPbI₃. Inspired by this fact, we propose novel electronic barrier adaptive concentrator-type photovoltaics, achieved by inserting an electronic barrier-inducing indene-C₆₀ bisadduct layer (ICBA). Under concentrated illumination, the potential barrier between FA_0.5MA_0.5Pb_0.5Sn_0.5I₃ and ICBA remarkably decreases, leading to a greater fill factor and a higher power conversion efficiency of 17.0% compared to that (15.6%) of the reference device. Our results provide a proof-of-concept demonstration of a novel photovoltaic system using the photophysical property of perovskites.

Original language	English
Pages (from-to)	1122-1130
Number of pages	9
Journal	ACS Energy Letters
Volume	8
Issue number	2
DOIs	https://doi.org/10.1021/acsenergylett.2c02791
State	Published - 10 Feb 2023

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title = "Harnessing Strong Band-Filling in Mixed Pb-Sn Perovskites Boosts the Performance of Concentrator-Type Photovoltaics",

abstract = "The need for cutting-edge solar power generation has led to the rapid development of organic-inorganic hybrid perovskites with unique photophysical properties. Photoinduced band-filling by free charge carriers, which is a consequence of the dynamic filling of the densities of states, modulates the optical transition toward high energy. Here, we observe strong band-filling in FA0.5MA0.5Pb0.5Sn0.5I3 polycrystalline films under continuous-wave excitation, which is much more evident than that in typical MAPbI3. Inspired by this fact, we propose novel electronic barrier adaptive concentrator-type photovoltaics, achieved by inserting an electronic barrier-inducing indene-C60 bisadduct layer (ICBA). Under concentrated illumination, the potential barrier between FA0.5MA0.5Pb0.5Sn0.5I3 and ICBA remarkably decreases, leading to a greater fill factor and a higher power conversion efficiency of 17.0% compared to that (15.6%) of the reference device. Our results provide a proof-of-concept demonstration of a novel photovoltaic system using the photophysical property of perovskites.",

author = "Hongki Kim and Han, {Gi Rim} and Kim, {Seong Keun} and Taecheon Lyu and Wonbin Choi and Lee, {Jong Woo} and Oh, {Joon Hak}",

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doi = "10.1021/acsenergylett.2c02791",

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AU - Kim, Hongki

AU - Han, Gi Rim

AU - Kim, Seong Keun

AU - Lyu, Taecheon

AU - Choi, Wonbin

AU - Lee, Jong Woo

AU - Oh, Joon Hak

PY - 2023/2/10

Y1 - 2023/2/10

N2 - The need for cutting-edge solar power generation has led to the rapid development of organic-inorganic hybrid perovskites with unique photophysical properties. Photoinduced band-filling by free charge carriers, which is a consequence of the dynamic filling of the densities of states, modulates the optical transition toward high energy. Here, we observe strong band-filling in FA0.5MA0.5Pb0.5Sn0.5I3 polycrystalline films under continuous-wave excitation, which is much more evident than that in typical MAPbI3. Inspired by this fact, we propose novel electronic barrier adaptive concentrator-type photovoltaics, achieved by inserting an electronic barrier-inducing indene-C60 bisadduct layer (ICBA). Under concentrated illumination, the potential barrier between FA0.5MA0.5Pb0.5Sn0.5I3 and ICBA remarkably decreases, leading to a greater fill factor and a higher power conversion efficiency of 17.0% compared to that (15.6%) of the reference device. Our results provide a proof-of-concept demonstration of a novel photovoltaic system using the photophysical property of perovskites.

AB - The need for cutting-edge solar power generation has led to the rapid development of organic-inorganic hybrid perovskites with unique photophysical properties. Photoinduced band-filling by free charge carriers, which is a consequence of the dynamic filling of the densities of states, modulates the optical transition toward high energy. Here, we observe strong band-filling in FA0.5MA0.5Pb0.5Sn0.5I3 polycrystalline films under continuous-wave excitation, which is much more evident than that in typical MAPbI3. Inspired by this fact, we propose novel electronic barrier adaptive concentrator-type photovoltaics, achieved by inserting an electronic barrier-inducing indene-C60 bisadduct layer (ICBA). Under concentrated illumination, the potential barrier between FA0.5MA0.5Pb0.5Sn0.5I3 and ICBA remarkably decreases, leading to a greater fill factor and a higher power conversion efficiency of 17.0% compared to that (15.6%) of the reference device. Our results provide a proof-of-concept demonstration of a novel photovoltaic system using the photophysical property of perovskites.

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Harnessing Strong Band-Filling in Mixed Pb-Sn Perovskites Boosts the Performance of Concentrator-Type Photovoltaics

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