Stabilizer-assisted growth of formamdinium-based perovskites for highly efficient and stable planar solar cells with over 22% efficiency

Guang Yang; Hengkai Zhang; Gang Li; Guojia Fang

doi:10.1016/j.nanoen.2019.06.031

Stabilizer-assisted growth of formamdinium-based perovskites for highly efficient and stable planar solar cells with over 22% efficiency

Guang Yang, Hengkai Zhang, Gang Li, Guojia Fang

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

56 Citations (Scopus)

Abstract

The best reported state-of-the-art perovskite solar cells (PSCs) show record power conversion efficiency (PCE) over 23%, where sequentially deposited formamidinium (FA)-dominated perovskites were adopted. Here, we develop a stabilizer-assisted growth method involving two stabilizers (MAPbBr₃ and MACl) to fabricate phase-pure formamidinium lead iodide (α-FAPbI₃) perovskite and substantially improve its opto-electronic properties. The high crystalline and large crystal grains within the α-FAPbI₃ perovskite film as well as the reduced defects contribute to the enhanced PCE up to 22.51% in planar PSCs. More importantly, the stability of phase-stabilized FAPbI₃ PSC is also significantly improved and the corresponding device exhibits an impressive 97% retention after 2600 h storage under ambient conditions. This work paves a way to further improve the photovoltaic performance and stability of FA-based planar PSCs.

Original language	English
Article number	103835
Journal	Nano Energy
Volume	63
DOIs	https://doi.org/10.1016/j.nanoen.2019.06.031
Publication status	Published - Sept 2019

Keywords

Opto-electronic properties
Phase-stabilized FAPbI3
Reduced defects
Stabilizer

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
General Materials Science
Electrical and Electronic Engineering

UN SDGs

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

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10.1016/j.nanoen.2019.06.031

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title = "Stabilizer-assisted growth of formamdinium-based perovskites for highly efficient and stable planar solar cells with over 22% efficiency",

abstract = "The best reported state-of-the-art perovskite solar cells (PSCs) show record power conversion efficiency (PCE) over 23%, where sequentially deposited formamidinium (FA)-dominated perovskites were adopted. Here, we develop a stabilizer-assisted growth method involving two stabilizers (MAPbBr3 and MACl) to fabricate phase-pure formamidinium lead iodide (α-FAPbI3) perovskite and substantially improve its opto-electronic properties. The high crystalline and large crystal grains within the α-FAPbI3 perovskite film as well as the reduced defects contribute to the enhanced PCE up to 22.51% in planar PSCs. More importantly, the stability of phase-stabilized FAPbI3 PSC is also significantly improved and the corresponding device exhibits an impressive 97% retention after 2600 h storage under ambient conditions. This work paves a way to further improve the photovoltaic performance and stability of FA-based planar PSCs.",

keywords = "Opto-electronic properties, Phase-stabilized FAPbI3, Reduced defects, Stabilizer",

author = "Guang Yang and Hengkai Zhang and Gang Li and Guojia Fang",

note = "Funding Information: This work was founded by the National Natural Science Foundation of China ( 11674252 ) and Special Funds for the Development of Strategic Emerging Industries in Shenzhen ( JCYJ20170818113036217 ). G.L. would like to thank the Project of Strategic Importance provided by The Hong Kong Polytechnic University ( 1-ZE29 ), Research Grants Council of Hong Kong ( 15246816 ). Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd Copyright: Copyright 2019 Elsevier B.V., All rights reserved.",

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AU - Fang, Guojia

N1 - Funding Information: This work was founded by the National Natural Science Foundation of China ( 11674252 ) and Special Funds for the Development of Strategic Emerging Industries in Shenzhen ( JCYJ20170818113036217 ). G.L. would like to thank the Project of Strategic Importance provided by The Hong Kong Polytechnic University ( 1-ZE29 ), Research Grants Council of Hong Kong ( 15246816 ). Publisher Copyright: © 2019 Elsevier Ltd Copyright: Copyright 2019 Elsevier B.V., All rights reserved.

PY - 2019/9

Y1 - 2019/9

N2 - The best reported state-of-the-art perovskite solar cells (PSCs) show record power conversion efficiency (PCE) over 23%, where sequentially deposited formamidinium (FA)-dominated perovskites were adopted. Here, we develop a stabilizer-assisted growth method involving two stabilizers (MAPbBr3 and MACl) to fabricate phase-pure formamidinium lead iodide (α-FAPbI3) perovskite and substantially improve its opto-electronic properties. The high crystalline and large crystal grains within the α-FAPbI3 perovskite film as well as the reduced defects contribute to the enhanced PCE up to 22.51% in planar PSCs. More importantly, the stability of phase-stabilized FAPbI3 PSC is also significantly improved and the corresponding device exhibits an impressive 97% retention after 2600 h storage under ambient conditions. This work paves a way to further improve the photovoltaic performance and stability of FA-based planar PSCs.

AB - The best reported state-of-the-art perovskite solar cells (PSCs) show record power conversion efficiency (PCE) over 23%, where sequentially deposited formamidinium (FA)-dominated perovskites were adopted. Here, we develop a stabilizer-assisted growth method involving two stabilizers (MAPbBr3 and MACl) to fabricate phase-pure formamidinium lead iodide (α-FAPbI3) perovskite and substantially improve its opto-electronic properties. The high crystalline and large crystal grains within the α-FAPbI3 perovskite film as well as the reduced defects contribute to the enhanced PCE up to 22.51% in planar PSCs. More importantly, the stability of phase-stabilized FAPbI3 PSC is also significantly improved and the corresponding device exhibits an impressive 97% retention after 2600 h storage under ambient conditions. This work paves a way to further improve the photovoltaic performance and stability of FA-based planar PSCs.

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Stabilizer-assisted growth of formamdinium-based perovskites for highly efficient and stable planar solar cells with over 22% efficiency

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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