Wide-bandgap perovskite solar cells with > 1.34 V Voc for all-perovskite tandems

Yunfei Li; Nannan Sun; Bo Feng; Wen Li; Zhengbo Cui; Wenxiao Zhang; Sheng Fu; Xiaodong Li; Junfeng Fang

doi:10.1016/j.cej.2025.163287

Wide-bandgap perovskite solar cells with > 1.34 V V_oc for all-perovskite tandems

Yunfei Li
, Nannan Sun
, Bo Feng
, Wen Li
, Zhengbo Cui
, Wenxiao Zhang
, Sheng Fu
, Xiaodong Li^*
, Junfeng Fang

^*Corresponding author for this work

School of Physics and Electronic Science

East China Normal University

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

6 Scopus citations

Abstract

High V_oc sub-cell is of great importance for all-perovskite tandem solar cells (PSCs). However, wide bandgap (WBG) perovskite usually suffers severe V_oc loss due to Cs-FA inhomogeneity. One key issue lies in the huge difference in crystallization temperature between Cs- and FA-based perovskite. Here, we develop a Cs-FA homogeneity strategy by shortening the difference between Cs/FA crystallization temperature with 1-propylsulfonic-3-methylimida-zolium chloride (SMCI) additive. SMCI will effectively reduce the crystallization temperature of Cs-based perovskite to 105 °C, making it simultaneously crystalized with FA-based perovskite. Resulting SMCI-based WBG PSCs (1.77 eV) achieve an efficiency of 20.03 % with high V_oc of 1.344 V. Furthermore, 2-terminal all-perovskite tandem solar cells are realized with an efficiency of 28.10 %.

Original language	English
Article number	163287
Journal	Chemical Engineering Journal
Volume	514
DOIs	https://doi.org/10.1016/j.cej.2025.163287
State	Published - 15 Jun 2025

Keywords

Cs/FA distribution
Homogeneity
Tandem device
Wide bandgap perovskite

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10.1016/j.cej.2025.163287

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@article{7758499d3ec44573913b30475755de53,

title = "Wide-bandgap perovskite solar cells with > 1.34 V Voc for all-perovskite tandems",

abstract = "High Voc sub-cell is of great importance for all-perovskite tandem solar cells (PSCs). However, wide bandgap (WBG) perovskite usually suffers severe Voc loss due to Cs-FA inhomogeneity. One key issue lies in the huge difference in crystallization temperature between Cs- and FA-based perovskite. Here, we develop a Cs-FA homogeneity strategy by shortening the difference between Cs/FA crystallization temperature with 1-propylsulfonic-3-methylimida-zolium chloride (SMCI) additive. SMCI will effectively reduce the crystallization temperature of Cs-based perovskite to 105 °C, making it simultaneously crystalized with FA-based perovskite. Resulting SMCI-based WBG PSCs (1.77 eV) achieve an efficiency of 20.03 \% with high Voc of 1.344 V. Furthermore, 2-terminal all-perovskite tandem solar cells are realized with an efficiency of 28.10 \%.",

keywords = "Cs/FA distribution, Homogeneity, Tandem device, Wide bandgap perovskite",

author = "Yunfei Li and Nannan Sun and Bo Feng and Wen Li and Zhengbo Cui and Wenxiao Zhang and Sheng Fu and Xiaodong Li and Junfeng Fang",

note = "Publisher Copyright: {\textcopyright} 2025",

year = "2025",

month = jun,

day = "15",

doi = "10.1016/j.cej.2025.163287",

language = "英语",

volume = "514",

journal = "Chemical Engineering Journal",

issn = "1385-8947",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Wide-bandgap perovskite solar cells with > 1.34 V Voc for all-perovskite tandems

AU - Li, Yunfei

AU - Sun, Nannan

AU - Feng, Bo

AU - Li, Wen

AU - Cui, Zhengbo

AU - Zhang, Wenxiao

AU - Fu, Sheng

AU - Li, Xiaodong

AU - Fang, Junfeng

PY - 2025/6/15

Y1 - 2025/6/15

N2 - High Voc sub-cell is of great importance for all-perovskite tandem solar cells (PSCs). However, wide bandgap (WBG) perovskite usually suffers severe Voc loss due to Cs-FA inhomogeneity. One key issue lies in the huge difference in crystallization temperature between Cs- and FA-based perovskite. Here, we develop a Cs-FA homogeneity strategy by shortening the difference between Cs/FA crystallization temperature with 1-propylsulfonic-3-methylimida-zolium chloride (SMCI) additive. SMCI will effectively reduce the crystallization temperature of Cs-based perovskite to 105 °C, making it simultaneously crystalized with FA-based perovskite. Resulting SMCI-based WBG PSCs (1.77 eV) achieve an efficiency of 20.03 % with high Voc of 1.344 V. Furthermore, 2-terminal all-perovskite tandem solar cells are realized with an efficiency of 28.10 %.

AB - High Voc sub-cell is of great importance for all-perovskite tandem solar cells (PSCs). However, wide bandgap (WBG) perovskite usually suffers severe Voc loss due to Cs-FA inhomogeneity. One key issue lies in the huge difference in crystallization temperature between Cs- and FA-based perovskite. Here, we develop a Cs-FA homogeneity strategy by shortening the difference between Cs/FA crystallization temperature with 1-propylsulfonic-3-methylimida-zolium chloride (SMCI) additive. SMCI will effectively reduce the crystallization temperature of Cs-based perovskite to 105 °C, making it simultaneously crystalized with FA-based perovskite. Resulting SMCI-based WBG PSCs (1.77 eV) achieve an efficiency of 20.03 % with high Voc of 1.344 V. Furthermore, 2-terminal all-perovskite tandem solar cells are realized with an efficiency of 28.10 %.

KW - Cs/FA distribution

KW - Homogeneity

KW - Tandem device

KW - Wide bandgap perovskite

UR - https://www.scopus.com/pages/publications/105003923867

U2 - 10.1016/j.cej.2025.163287

DO - 10.1016/j.cej.2025.163287

M3 - 文章

AN - SCOPUS:105003923867

SN - 1385-8947

VL - 514

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

M1 - 163287

ER -

Wide-bandgap perovskite solar cells with > 1.34 V V_oc for all-perovskite tandems

Abstract

Keywords

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