Improved crystallinity of perovskite via molecularly tailored surface modification of SnO2

Detao Liu; Hualin Zheng; Long Ji; Hao Chen; Yafei Wang; Peng Zhang; Feng Wang; Jiang Wu; Zhi Chen; Shibin Li

doi:10.1016/j.jpowsour.2019.227161

Improved crystallinity of perovskite via molecularly tailored surface modification of SnO₂

Detao Liu, Hualin Zheng, Long Ji, Hao Chen, Yafei Wang, Peng Zhang, Feng Wang, Jiang Wu, Zhi Chen, Shibin Li

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

21 Scopus citations

Abstract

The photovoltaic performance of perovskite solar cells (PSCs) largely depends on the crystal grain size of perovskite films. Here, we use the mixture of n-octyltrimethoxysilane (OTES) and aminopropyltrimethoxysilane (APTES) to tailor the surface termination state of SnO₂ electron transport layer, and demonstrate the crystal grain size of perovskite is remarkably enlarged. The perovskite film with large crystal size shows a lower non-radical recombination density and a longer charge lifetime. The power conversion efficiency of PSCs is eventually improved from 18.21% to 20.3%. The proposed method may also impact other optoelectronic devices based perovskite films.

Original language	English
Article number	227161
Journal	Journal of Power Sources
Volume	441
DOIs	https://doi.org/10.1016/j.jpowsour.2019.227161
State	Published - Nov 30 2019

Bibliographical note

Publisher Copyright:
© 2019 Elsevier B.V.

Funding

This work was supported by National Natural Science Foundation of China under Grant Nos. 61874150 , 61421002 and 61574029 . This work was also partially supported by University of Kentucky . The manuscript was written through contributions of all authors. All authors have given approval to the final version of the manuscript. The authors declare no competing financial interests.

Funders	Funder number
University of Kentucky
National Natural Science Foundation of China (NSFC)	61574029, 61874150, 61421002

Keywords

Crystalline
Perovskite solar cells
SnO
Surface terminal
Trimethoxysilane

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2019.227161

Cite this

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title = "Improved crystallinity of perovskite via molecularly tailored surface modification of SnO2",

abstract = "The photovoltaic performance of perovskite solar cells (PSCs) largely depends on the crystal grain size of perovskite films. Here, we use the mixture of n-octyltrimethoxysilane (OTES) and aminopropyltrimethoxysilane (APTES) to tailor the surface termination state of SnO2 electron transport layer, and demonstrate the crystal grain size of perovskite is remarkably enlarged. The perovskite film with large crystal size shows a lower non-radical recombination density and a longer charge lifetime. The power conversion efficiency of PSCs is eventually improved from 18.21% to 20.3%. The proposed method may also impact other optoelectronic devices based perovskite films.",

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AU - Liu, Detao

AU - Zheng, Hualin

AU - Ji, Long

AU - Chen, Hao

AU - Wang, Yafei

AU - Zhang, Peng

AU - Wang, Feng

AU - Wu, Jiang

AU - Chen, Zhi

AU - Li, Shibin

PY - 2019/11/30

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N2 - The photovoltaic performance of perovskite solar cells (PSCs) largely depends on the crystal grain size of perovskite films. Here, we use the mixture of n-octyltrimethoxysilane (OTES) and aminopropyltrimethoxysilane (APTES) to tailor the surface termination state of SnO2 electron transport layer, and demonstrate the crystal grain size of perovskite is remarkably enlarged. The perovskite film with large crystal size shows a lower non-radical recombination density and a longer charge lifetime. The power conversion efficiency of PSCs is eventually improved from 18.21% to 20.3%. The proposed method may also impact other optoelectronic devices based perovskite films.

AB - The photovoltaic performance of perovskite solar cells (PSCs) largely depends on the crystal grain size of perovskite films. Here, we use the mixture of n-octyltrimethoxysilane (OTES) and aminopropyltrimethoxysilane (APTES) to tailor the surface termination state of SnO2 electron transport layer, and demonstrate the crystal grain size of perovskite is remarkably enlarged. The perovskite film with large crystal size shows a lower non-radical recombination density and a longer charge lifetime. The power conversion efficiency of PSCs is eventually improved from 18.21% to 20.3%. The proposed method may also impact other optoelectronic devices based perovskite films.

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KW - Trimethoxysilane

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