Ammonium Additive Engineering in Antisolvents for Improving Perovskite/Charge-Transport-Layer Interfaces toward Efficient Lead-Tin Alloyed Perovskite Solar Cells

Ting Zhang; Feng Qian; Yahui Zhai; Jian Li; Lei Wang; Zecheng Diao; Shihao Yuan; Hualin Zheng; Yafei Wang; Yanli Gong; Zhi David Chen; Shibin Li

doi:10.1021/acsami.3c19237

Ammonium Additive Engineering in Antisolvents for Improving Perovskite/Charge-Transport-Layer Interfaces toward Efficient Lead-Tin Alloyed Perovskite Solar Cells

Ting Zhang, Feng Qian, Yahui Zhai, Jian Li, Lei Wang, Zecheng Diao, Shihao Yuan, Hualin Zheng, Yafei Wang, Yanli Gong, Zhi David Chen, Shibin Li

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

2 Scopus citations

Abstract

Although significant advancements have been achieved in lead-tin (Pb-Sn) alloyed perovskite solar cells (PSCs), their power conversion efficiency (PCE) remains inferior to that of their Pb-based counterparts, primarily due to higher open-circuit voltage (V_oc) losses and lower fill factors (FFs). Herein, we report both perovskite top and bottom interfacial improvements by incorporating a facile fluorophenylethylammonium iodide (p-FPEAI)/ethyl acetate (EA) solution during the film crystal growth. Based on the analysis of perovskite crystallization, film growth, and strain relaxation, the mechanisms behind these interfacial improvements have been well understood. Furthermore, p-FPEAI could reduce the defect density and nonradiative recombination losses, thus attributing to the improved V_oc and FF. Finally, the treated device achieved a PCE of 20.14% with a V_oc of up to 0.84 V, which is among the highest reported values so far for Pb-Sn alloyed PSCs without additional precursor additives. In addition, the unencapsulated p-FPEAI-treated device maintained its initial efficiency of approximately 92% after being kept in a nitrogen atmosphere for 1 month, in contrast to the control device which retained only 30% of its initial value. Our findings provide a comprehension for understanding the effect of bulky cations as antisolvents on fabricating highly efficient Pb-Sn alloyed perovskite solar cells.

Original language	English
Pages (from-to)	13763-13772
Number of pages	10
Journal	ACS Applied Materials and Interfaces
Volume	16
Issue number	11
DOIs	https://doi.org/10.1021/acsami.3c19237
State	Published - Mar 20 2024

Bibliographical note

Publisher Copyright:
© 2024 American Chemical Society.

Funding

This work has received support from the National Natural Science Foundation of China under grant nos. 62104028 and 62174021, the Creative Research Groups of the National Natural Science Foundation of Sichuan Province under grant no. 2023NSFSC1973, the Natural Science Foundation of Sichuan Province under grant no. 2022NSFSC0899, and the China Postdoctoral Science Foundation under grant no. 2021M700689. Y.W. acknowledges the financial support from the Scientific and Technological Planning Project of Guangzhou City under the grant nos. 2023A04J1726 and 2023A03J0124. The authors extend their appreciation to Z.D.C. from the Department of Electrical & Computer Engineering and the Center for Nanoscale Science & Engineering at the University of Kentucky for his assistance with the acquisition of GIWAXS data. The authors also thank the Sichuan Province Key Laboratory of Display Science and Technology for facilitating the photoluminescence (PL) measurement services.

Funders	Funder number
Sichuan Province Key Laboratory of Display Science and Technology
UK Center for Nanoscale Science and Engineering
Department of Electrical and Computer Engineering, Western Michigan University
China Postdoctoral Science Foundation	2021M700689
National Natural Science Foundation of China (NSFC)	62104028, 62174021
Natural Science Foundation of Sichuan Province	2022NSFSC0899, 2023NSFSC1973
Scientific and Technological Planning Project of Guangzhou City	2023A04J1726, 2023A03J0124

Keywords

Pb-Sn alloyed perovskite solar cells
Sn oxidation
antisolvent
stability

ASJC Scopus subject areas

General Materials Science

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10.1021/acsami.3c19237

Cite this

Zhang, T., Qian, F., Zhai, Y., Li, J., Wang, L., Diao, Z., Yuan, S., Zheng, H., Wang, Y., Gong, Y., Chen, Z. D., & Li, S. (2024). Ammonium Additive Engineering in Antisolvents for Improving Perovskite/Charge-Transport-Layer Interfaces toward Efficient Lead-Tin Alloyed Perovskite Solar Cells. ACS Applied Materials and Interfaces, 16(11), 13763-13772. https://doi.org/10.1021/acsami.3c19237

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title = "Ammonium Additive Engineering in Antisolvents for Improving Perovskite/Charge-Transport-Layer Interfaces toward Efficient Lead-Tin Alloyed Perovskite Solar Cells",

abstract = "Although significant advancements have been achieved in lead-tin (Pb-Sn) alloyed perovskite solar cells (PSCs), their power conversion efficiency (PCE) remains inferior to that of their Pb-based counterparts, primarily due to higher open-circuit voltage (Voc) losses and lower fill factors (FFs). Herein, we report both perovskite top and bottom interfacial improvements by incorporating a facile fluorophenylethylammonium iodide (p-FPEAI)/ethyl acetate (EA) solution during the film crystal growth. Based on the analysis of perovskite crystallization, film growth, and strain relaxation, the mechanisms behind these interfacial improvements have been well understood. Furthermore, p-FPEAI could reduce the defect density and nonradiative recombination losses, thus attributing to the improved Voc and FF. Finally, the treated device achieved a PCE of 20.14% with a Voc of up to 0.84 V, which is among the highest reported values so far for Pb-Sn alloyed PSCs without additional precursor additives. In addition, the unencapsulated p-FPEAI-treated device maintained its initial efficiency of approximately 92% after being kept in a nitrogen atmosphere for 1 month, in contrast to the control device which retained only 30% of its initial value. Our findings provide a comprehension for understanding the effect of bulky cations as antisolvents on fabricating highly efficient Pb-Sn alloyed perovskite solar cells.",

keywords = "Pb-Sn alloyed perovskite solar cells, Sn oxidation, antisolvent, stability",

author = "Ting Zhang and Feng Qian and Yahui Zhai and Jian Li and Lei Wang and Zecheng Diao and Shihao Yuan and Hualin Zheng and Yafei Wang and Yanli Gong and Chen, {Zhi David} and Shibin Li",

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Zhang, T, Qian, F, Zhai, Y, Li, J, Wang, L, Diao, Z, Yuan, S, Zheng, H, Wang, Y, Gong, Y, Chen, ZD & Li, S 2024, 'Ammonium Additive Engineering in Antisolvents for Improving Perovskite/Charge-Transport-Layer Interfaces toward Efficient Lead-Tin Alloyed Perovskite Solar Cells', ACS Applied Materials and Interfaces, vol. 16, no. 11, pp. 13763-13772. https://doi.org/10.1021/acsami.3c19237

TY - JOUR

T1 - Ammonium Additive Engineering in Antisolvents for Improving Perovskite/Charge-Transport-Layer Interfaces toward Efficient Lead-Tin Alloyed Perovskite Solar Cells

AU - Zhang, Ting

AU - Qian, Feng

AU - Zhai, Yahui

AU - Li, Jian

AU - Wang, Lei

AU - Diao, Zecheng

AU - Yuan, Shihao

AU - Zheng, Hualin

AU - Wang, Yafei

AU - Gong, Yanli

AU - Chen, Zhi David

AU - Li, Shibin

PY - 2024/3/20

Y1 - 2024/3/20

N2 - Although significant advancements have been achieved in lead-tin (Pb-Sn) alloyed perovskite solar cells (PSCs), their power conversion efficiency (PCE) remains inferior to that of their Pb-based counterparts, primarily due to higher open-circuit voltage (Voc) losses and lower fill factors (FFs). Herein, we report both perovskite top and bottom interfacial improvements by incorporating a facile fluorophenylethylammonium iodide (p-FPEAI)/ethyl acetate (EA) solution during the film crystal growth. Based on the analysis of perovskite crystallization, film growth, and strain relaxation, the mechanisms behind these interfacial improvements have been well understood. Furthermore, p-FPEAI could reduce the defect density and nonradiative recombination losses, thus attributing to the improved Voc and FF. Finally, the treated device achieved a PCE of 20.14% with a Voc of up to 0.84 V, which is among the highest reported values so far for Pb-Sn alloyed PSCs without additional precursor additives. In addition, the unencapsulated p-FPEAI-treated device maintained its initial efficiency of approximately 92% after being kept in a nitrogen atmosphere for 1 month, in contrast to the control device which retained only 30% of its initial value. Our findings provide a comprehension for understanding the effect of bulky cations as antisolvents on fabricating highly efficient Pb-Sn alloyed perovskite solar cells.

AB - Although significant advancements have been achieved in lead-tin (Pb-Sn) alloyed perovskite solar cells (PSCs), their power conversion efficiency (PCE) remains inferior to that of their Pb-based counterparts, primarily due to higher open-circuit voltage (Voc) losses and lower fill factors (FFs). Herein, we report both perovskite top and bottom interfacial improvements by incorporating a facile fluorophenylethylammonium iodide (p-FPEAI)/ethyl acetate (EA) solution during the film crystal growth. Based on the analysis of perovskite crystallization, film growth, and strain relaxation, the mechanisms behind these interfacial improvements have been well understood. Furthermore, p-FPEAI could reduce the defect density and nonradiative recombination losses, thus attributing to the improved Voc and FF. Finally, the treated device achieved a PCE of 20.14% with a Voc of up to 0.84 V, which is among the highest reported values so far for Pb-Sn alloyed PSCs without additional precursor additives. In addition, the unencapsulated p-FPEAI-treated device maintained its initial efficiency of approximately 92% after being kept in a nitrogen atmosphere for 1 month, in contrast to the control device which retained only 30% of its initial value. Our findings provide a comprehension for understanding the effect of bulky cations as antisolvents on fabricating highly efficient Pb-Sn alloyed perovskite solar cells.

KW - Pb-Sn alloyed perovskite solar cells

KW - Sn oxidation

KW - antisolvent

KW - stability

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Ammonium Additive Engineering in Antisolvents for Improving Perovskite/Charge-Transport-Layer Interfaces toward Efficient Lead-Tin Alloyed Perovskite Solar Cells

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

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