Lead-Free Flexible Perovskite Solar Cells with Interfacial Native Oxide Have >10% Efficiency and Simultaneously Enhanced Stability and Reliability

Min Chen; Qingshun Dong; Chuanxiao Xiao; Xiaopeng Zheng; Zhengdong Dai; Yantao Shi; Joseph Luther; Nitin Padture

doi:10.1021/acsenergylett.2c01130

Lead-Free Flexible Perovskite Solar Cells with Interfacial Native Oxide Have >10% Efficiency and Simultaneously Enhanced Stability and Reliability

Min Chen, Qingshun Dong, Chuanxiao Xiao, Xiaopeng Zheng, Zhengdong Dai, Yantao Shi, Joseph Luther, Nitin Padture

Chemistry and Nanoscience

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

33 Scopus Citations

Abstract

Here we demonstrate an innovative compositional and interfacial engineering approach to achieve Pb-free flexible perovskite solar cells (f-PSCs) with an unprecedented combination of the highest efficiency reported to date (10.43%), together with enhanced operational stability and mechanical reliability. The key to this approach is alloying of an FASnI3 metal halide perovskite (MHP) thin film with Ge2+ to stabilize the Sn2+ oxidation state in the MHP, together with the use of a NiOx hole-transport layer. We show that this results in the in situ formation of a thin amorphous GeO2 native oxide layer at the NiOx/FASn0.9Ge0.1I3 interface. This layer not only passivates that critical interface but also enhances the interfacial mechanical bonding.

Original language	American English
Pages (from-to)	2256-2264
Number of pages	9
Journal	ACS Energy Letters
Volume	7
Issue number	7
DOIs	https://doi.org/10.1021/acsenergylett.2c01130 https://doi.org/10.1021/acsenergylett.2c01130
State	Published - 8 Jul 2022

Bibliographical note

Publisher Copyright:
© 2022 American Chemical Society.

NREL Publication Number

NREL/JA-5900-83146

Keywords

efficiency
mechanical reliability
operational stability
perovskite solar cells

UN SDGs

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

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Chen, M., Dong, Q., Xiao, C., Zheng, X., Dai, Z., Shi, Y., Luther, J., & Padture, N. (2022). Lead-Free Flexible Perovskite Solar Cells with Interfacial Native Oxide Have >10% Efficiency and Simultaneously Enhanced Stability and Reliability. ACS Energy Letters, 7(7), 2256-2264. https://doi.org/10.1021/acsenergylett.2c01130, https://doi.org/10.1021/acsenergylett.2c01130

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abstract = "Here we demonstrate an innovative compositional and interfacial engineering approach to achieve Pb-free flexible perovskite solar cells (f-PSCs) with an unprecedented combination of the highest efficiency reported to date (10.43%), together with enhanced operational stability and mechanical reliability. The key to this approach is alloying of an FASnI3 metal halide perovskite (MHP) thin film with Ge2+ to stabilize the Sn2+ oxidation state in the MHP, together with the use of a NiOx hole-transport layer. We show that this results in the in situ formation of a thin amorphous GeO2 native oxide layer at the NiOx/FASn0.9Ge0.1I3 interface. This layer not only passivates that critical interface but also enhances the interfacial mechanical bonding.",

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Chen, M, Dong, Q, Xiao, C, Zheng, X, Dai, Z, Shi, Y, Luther, J & Padture, N 2022, 'Lead-Free Flexible Perovskite Solar Cells with Interfacial Native Oxide Have >10% Efficiency and Simultaneously Enhanced Stability and Reliability', ACS Energy Letters, vol. 7, no. 7, pp. 2256-2264. https://doi.org/10.1021/acsenergylett.2c01130, https://doi.org/10.1021/acsenergylett.2c01130

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T1 - Lead-Free Flexible Perovskite Solar Cells with Interfacial Native Oxide Have >10% Efficiency and Simultaneously Enhanced Stability and Reliability

AU - Chen, Min

AU - Dong, Qingshun

AU - Xiao, Chuanxiao

AU - Zheng, Xiaopeng

AU - Dai, Zhengdong

AU - Shi, Yantao

AU - Luther, Joseph

AU - Padture, Nitin

PY - 2022/7/8

Y1 - 2022/7/8

N2 - Here we demonstrate an innovative compositional and interfacial engineering approach to achieve Pb-free flexible perovskite solar cells (f-PSCs) with an unprecedented combination of the highest efficiency reported to date (10.43%), together with enhanced operational stability and mechanical reliability. The key to this approach is alloying of an FASnI3 metal halide perovskite (MHP) thin film with Ge2+ to stabilize the Sn2+ oxidation state in the MHP, together with the use of a NiOx hole-transport layer. We show that this results in the in situ formation of a thin amorphous GeO2 native oxide layer at the NiOx/FASn0.9Ge0.1I3 interface. This layer not only passivates that critical interface but also enhances the interfacial mechanical bonding.

AB - Here we demonstrate an innovative compositional and interfacial engineering approach to achieve Pb-free flexible perovskite solar cells (f-PSCs) with an unprecedented combination of the highest efficiency reported to date (10.43%), together with enhanced operational stability and mechanical reliability. The key to this approach is alloying of an FASnI3 metal halide perovskite (MHP) thin film with Ge2+ to stabilize the Sn2+ oxidation state in the MHP, together with the use of a NiOx hole-transport layer. We show that this results in the in situ formation of a thin amorphous GeO2 native oxide layer at the NiOx/FASn0.9Ge0.1I3 interface. This layer not only passivates that critical interface but also enhances the interfacial mechanical bonding.

KW - efficiency

KW - mechanical reliability

KW - operational stability

KW - perovskite solar cells

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ER -

Lead-Free Flexible Perovskite Solar Cells with Interfacial Native Oxide Have >10% Efficiency and Simultaneously Enhanced Stability and Reliability

Abstract

Bibliographical note

NREL Publication Number

Keywords

UN SDGs

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