Boosting the performance and stability of inverted perovskite solar cells by using a carbolong derivative to modulate the cathode interface

Li, Jinhua1,2; Wang, Jiantao3; Zhou, Yecheng4; Yu, Chengzhuo3; Liu, Heng3; Qi, Xingnan3; Li, Ruxue5; Hua, Yuhui1,2; Yu, Yinye4; Chen, Rui5; Chen, Dafa1; Mao, Lingling1; Xia, Haiping1,2; Wang, Hsing-Lin3,6

2022-07-01

10.1039/d2qm00452f

MATERIALS CHEMISTRY FRONTIERS   Impact Factor & Quartile

2052-1537

Perovskite solar cells (PSCs) require low work function (WF) cathodes to collect electrons, but often chemically reactive metals are used for devices with inverted configuration. Reactive metals (such as Ag, Cu and Al) with low WF encounter easy oxidation and corrosion, which threatens the long-term stability of devices. Herein, we tailor an organometallic carbolong derivative to modulate the cathode interface in inverted PSCs for the enhancement of power conversion efficiency (PCE) and stability. Density functional theory and surface WF characterization reveal that this organometallic compound can reduce the WF of metals by forming interfacial and molecular dipoles, which reduce the energy barrier for electron transport from the electron transport layer to the external metal cathode. By using this carbolong derivative to modulate the cathode interface, inverted PSCs based on the commonly used Ag cathode obtain a PCE of 21.46% with a remarkable FF of 83.14%. By replacing low-WF Ag with high WF Au, the devices achieve more than 20% PCE and improved ambient stability, and can maintain over 85% of the initial PCE for over 500 h in an inert environment under the maximum power point (MPP) tracking. This work provides a significant route for the realization of high-efficiency and stable PSCs by integrating rationally designed cathode interfacial materials and chemically stable metals.

SCI ; EI

English

First ; Corresponding

Key-Area Research and Development Program of Guangdong Province[2019B010941001] ; Shenzhen Science and Technology Innovation Committee["CYJ20170817110652558","JCYJ20210324105013035","JCYJ20200109140812302"] ; National Natural Science Foundation of China["92156021","21931002","22071098","21871068"] ; Guangdong Provincial Key Laboratory of Energy Materials for Electric Power[2018B030322001]

Chemistry ; Materials Science

Chemistry, Multidisciplinary ; Materials Science, Multidisciplinary

WOS:000823795100001

ROYAL SOC CHEMISTRY

20223712723390

Aluminum corrosion ; Copper corrosion ; Density functional theory ; Electron transport properties ; Metals ; Organometallics ; Perovskite ; Perovskite solar cells ; Stability

Minerals:482.2 ; Metals Corrosion:539.1 ; Aluminum:541.1 ; Copper:544.1 ; Solar Cells:702.3 ; Organic Compounds:804.1 ; Probability Theory:922.1 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4

Web of Science

1.Southern Univ Sci & Technol, Shenzhen Grubbs Inst, Dept Chem, Xueyuan Ave 1088, Shenzhen 518055, Peoples R China
2.Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, Xiamen 361005, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Xueyuan Ave 1088, Shenzhen 518055, Peoples R China
4.Sun Yat Sen Univ, Sch Mat Sci & Engn, Zhongshan West Rd 135, Guangzhou 510275, Peoples R China
5.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Xueyuan Ave 1088, Shenzhen 518055, Peoples R China
6.Southern Univ Sci & Technol, Guangdong Prov Key Lab Energy Mat Elect Power, Xueyuan Ave 1088, Shenzhen 518055, Peoples R China

Li, Jinhua,Wang, Jiantao,Zhou, Yecheng,et al. Boosting the performance and stability of inverted perovskite solar cells by using a carbolong derivative to modulate the cathode interface[J]. MATERIALS CHEMISTRY FRONTIERS,2022,6:2211-2218.

Li, Jinhua.,Wang, Jiantao.,Zhou, Yecheng.,Yu, Chengzhuo.,Liu, Heng.,...&Wang, Hsing-Lin.(2022).Boosting the performance and stability of inverted perovskite solar cells by using a carbolong derivative to modulate the cathode interface.MATERIALS CHEMISTRY FRONTIERS,6,2211-2218.

Li, Jinhua,et al."Boosting the performance and stability of inverted perovskite solar cells by using a carbolong derivative to modulate the cathode interface".MATERIALS CHEMISTRY FRONTIERS 6(2022):2211-2218.