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Nano Research 2023, 16(1): 521-527 https://doi.org/10.1007/s12274-022-4774-8
Research Article | Issue | Published: 08 August 2022

Spontaneous relaxation of 2D passivation layer contributes to the aging-induced performance enhancement of perovskite solar cells

Show Author's Information Wenjing Yu1,  Changjiang Liu1,  Xiaoran Sun1( ),  Tian Hou1,  Xin Yang1,  Xin Wang1,  Yue Yu1,  Kai Chen1,  Haijin Li1,  Yuelong Huang1,2( ),  Meng Zhang1,2( )
Institute of Photovoltaics, Southwest Petroleum University, Chengdu 610500, China
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
Keywords:
passivation, perovskite solar cell, two-dimensional (2D) perovskite, aging, relaxation
Topics:
Perovskite solar cells
Cite this article:
Yu W, Liu C, Sun X, et al. Spontaneous relaxation of 2D passivation layer contributes to the aging-induced performance enhancement of perovskite solar cells. Nano Research, 2023, 16(1): 521-527. https://doi.org/10.1007/s12274-022-4774-8
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Abstract Full text Electronic supplementary material About this article

The aging-induced performance enhancement of the perovskite solar cells (PSCs) has been considered to be associated with the oxidation progress of the hole-transporting layer. Whereas the influence of the structural evolution of the passivation layer is underestimated. In this work, a spontaneous relaxation of two-dimensional (2D) passivation layer with increased n-value structure is observed, which can be accelerated under ambient atmosphere. It is demonstrated that device with relaxed 2D passivation layer exhibits reduced non-radiative recombination and optimized charge transfer property, contributing substantially to the aging-induced performance enhancement in 2D-3D heterostructured PSCs. Finally, a high fill factor of 84.15% of the devices is obtained with the relaxed 2D passivation layer, suggesting the spontaneous relaxation of 2D passivation layer is playing a key role in achieving high quality optoelectronic devices.


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Electronic supplementary material
About this article

Spontaneous relaxation of 2D passivation layer contributes to the aging-induced performance enhancement of perovskite solar cells

Show Author's information Wenjing Yu1, Changjiang Liu1, Xiaoran Sun1( ), Tian Hou1, Xin Yang1, Xin Wang1, Yue Yu1, Kai Chen1, Haijin Li1, Yuelong Huang1,2( ), Meng Zhang1,2( )
Institute of Photovoltaics, Southwest Petroleum University, Chengdu 610500, China
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China

Abstract

The aging-induced performance enhancement of the perovskite solar cells (PSCs) has been considered to be associated with the oxidation progress of the hole-transporting layer. Whereas the influence of the structural evolution of the passivation layer is underestimated. In this work, a spontaneous relaxation of two-dimensional (2D) passivation layer with increased n-value structure is observed, which can be accelerated under ambient atmosphere. It is demonstrated that device with relaxed 2D passivation layer exhibits reduced non-radiative recombination and optimized charge transfer property, contributing substantially to the aging-induced performance enhancement in 2D-3D heterostructured PSCs. Finally, a high fill factor of 84.15% of the devices is obtained with the relaxed 2D passivation layer, suggesting the spontaneous relaxation of 2D passivation layer is playing a key role in achieving high quality optoelectronic devices.

Keywords: passivation, perovskite solar cell, two-dimensional (2D) perovskite, aging, relaxation

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Publication history
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Acknowledgements

Publication history

Received: 24 April 2022
Revised: 13 July 2022
Accepted: 14 July 2022
Published: 08 August 2022
Issue date: January 2023

Copyright

© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

M. Z. acknowledges the Sichuan Science and Technology Program (No. 2022YFH0080). This work was also supported by scientific research starting project of SWPU (Nos. 2021QHZ005 and 2021QHZ021).

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