Formation of a Fast Charge Transfer Channel in Quasi-2D Perovskite Solar Cells through External Electric Field Modulation

Quasi-2D perovskites solar cells exhibit excellent environmental stability, but relatively low photovoltaic properties, compared with 3D perovskites solar cells. However, charge transport and extraction in quasi-2D perovskite solar cells are still limited by the inevitable quantum well effect, resul...

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Autores principales:	Xixiang Zhu, Liping Peng, Jinpeng Li, Haomiao Yu, Yulin Xie
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	quasi-2D perovskite ions electric field modulation Technology T
Acceso en línea:	https://doaj.org/article/8c3af64411a340caa96a168c8c5f9fa9
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spelling	oai:doaj.org-article:8c3af64411a340caa96a168c8c5f9fa92021-11-11T16:07:01ZFormation of a Fast Charge Transfer Channel in Quasi-2D Perovskite Solar Cells through External Electric Field Modulation10.3390/en142174021996-1073https://doaj.org/article/8c3af64411a340caa96a168c8c5f9fa92021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7402https://doaj.org/toc/1996-1073Quasi-2D perovskites solar cells exhibit excellent environmental stability, but relatively low photovoltaic properties, compared with 3D perovskites solar cells. However, charge transport and extraction in quasi-2D perovskite solar cells are still limited by the inevitable quantum well effect, resulting in low power conversion efficiency (PCE). To date, most efforts concentrate on crystal orientation and favorable alignment during materials and films processing. In this paper, we demonstrated that the quasi-2D perovskite [(BA)<sub>2</sub>(MA)<sub>3</sub>Pb<sub>4</sub>I<sub>13</sub> (<i>n</i> = 4)] solar cells show an optimized device performance through forming a fast charge transfer channel among 2D quantum wells through external electric field modulation, with appropriate modulation bias and time after the device has been fabricated. Essentially, ions will move directionally due to local polarization in quasi-2D perovskite solar cells under the action of electric field modulation. More importantly, the mobile ions function as a dopant to de-passivate the defects when releasing at grain boundaries, while decreasing built-in potential by applying forward modulation bias with proper modulation time. The capacitance-voltage characteristics indicate that electric field modulation can decrease the charge accumulation and improve the charge collection in quasi-2D perovskite solar cells. Photoluminescence (PL) studies confirm that the non-radiative recombination is reduced by electric field modulation, leading to enhanced charge transfer. Our work indicates that external electric field modulation is an effective method to form a fast charge transfer channel among 2D quantum wells, leading to enhanced charge transfer and charge collection through local polarization toward developing high–performance quasi-2D perovskite devices.Xixiang ZhuLiping PengJinpeng LiHaomiao YuYulin XieMDPI AGarticlequasi-2D perovskiteionselectric field modulationTechnologyTENEnergies, Vol 14, Iss 7402, p 7402 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	quasi-2D perovskite ions electric field modulation Technology T
spellingShingle	quasi-2D perovskite ions electric field modulation Technology T Xixiang Zhu Liping Peng Jinpeng Li Haomiao Yu Yulin Xie Formation of a Fast Charge Transfer Channel in Quasi-2D Perovskite Solar Cells through External Electric Field Modulation
description	Quasi-2D perovskites solar cells exhibit excellent environmental stability, but relatively low photovoltaic properties, compared with 3D perovskites solar cells. However, charge transport and extraction in quasi-2D perovskite solar cells are still limited by the inevitable quantum well effect, resulting in low power conversion efficiency (PCE). To date, most efforts concentrate on crystal orientation and favorable alignment during materials and films processing. In this paper, we demonstrated that the quasi-2D perovskite [(BA)<sub>2</sub>(MA)<sub>3</sub>Pb<sub>4</sub>I<sub>13</sub> (<i>n</i> = 4)] solar cells show an optimized device performance through forming a fast charge transfer channel among 2D quantum wells through external electric field modulation, with appropriate modulation bias and time after the device has been fabricated. Essentially, ions will move directionally due to local polarization in quasi-2D perovskite solar cells under the action of electric field modulation. More importantly, the mobile ions function as a dopant to de-passivate the defects when releasing at grain boundaries, while decreasing built-in potential by applying forward modulation bias with proper modulation time. The capacitance-voltage characteristics indicate that electric field modulation can decrease the charge accumulation and improve the charge collection in quasi-2D perovskite solar cells. Photoluminescence (PL) studies confirm that the non-radiative recombination is reduced by electric field modulation, leading to enhanced charge transfer. Our work indicates that external electric field modulation is an effective method to form a fast charge transfer channel among 2D quantum wells, leading to enhanced charge transfer and charge collection through local polarization toward developing high–performance quasi-2D perovskite devices.
format	article
author	Xixiang Zhu Liping Peng Jinpeng Li Haomiao Yu Yulin Xie
author_facet	Xixiang Zhu Liping Peng Jinpeng Li Haomiao Yu Yulin Xie
author_sort	Xixiang Zhu
title	Formation of a Fast Charge Transfer Channel in Quasi-2D Perovskite Solar Cells through External Electric Field Modulation
title_short	Formation of a Fast Charge Transfer Channel in Quasi-2D Perovskite Solar Cells through External Electric Field Modulation
title_full	Formation of a Fast Charge Transfer Channel in Quasi-2D Perovskite Solar Cells through External Electric Field Modulation
title_fullStr	Formation of a Fast Charge Transfer Channel in Quasi-2D Perovskite Solar Cells through External Electric Field Modulation
title_full_unstemmed	Formation of a Fast Charge Transfer Channel in Quasi-2D Perovskite Solar Cells through External Electric Field Modulation
title_sort	formation of a fast charge transfer channel in quasi-2d perovskite solar cells through external electric field modulation
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8c3af64411a340caa96a168c8c5f9fa9
work_keys_str_mv	AT xixiangzhu formationofafastchargetransferchannelinquasi2dperovskitesolarcellsthroughexternalelectricfieldmodulation AT lipingpeng formationofafastchargetransferchannelinquasi2dperovskitesolarcellsthroughexternalelectricfieldmodulation AT jinpengli formationofafastchargetransferchannelinquasi2dperovskitesolarcellsthroughexternalelectricfieldmodulation AT haomiaoyu formationofafastchargetransferchannelinquasi2dperovskitesolarcellsthroughexternalelectricfieldmodulation AT yulinxie formationofafastchargetransferchannelinquasi2dperovskitesolarcellsthroughexternalelectricfieldmodulation
_version_	1718432426894557184

Formation of a Fast Charge Transfer Channel in Quasi-2D Perovskite Solar Cells through External Electric Field Modulation

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