journal article·2024-06-14

Synergistically Stabilizing Hole Transport Layer and Dual Interface Enables High-Performance Perovskite Solar Cells

Dongmei He, Danqing Ma, Ru Li, Baibai Liu, Qian Zhou, Hua Yang, Shirong Lu, Zhengfu Zhang, Caiju Li, Xiong Li, Liming Ding, Jing Feng, Jianhong Yi, Jiangzhao Chen

ACS Energy Letters· Volume 9· Issue 6
Publisher page

Abstract

The migration and diffusion of Li + and halide ions, as well as the volatilization of 4-tert butylpyridine ( t BP), seriously restrain the long-term operational stability of n- i -p perovskite solar cells (PSCs). Herein, we employ l -glutamic acid dibenzyl ester 4-toluenesulfonate (GADET) to simultaneously modulate the hole transport layer (HTL) and buried interface, which stabilizes the HTL and minimizes interfacial energy loss by immobilizing Li +, t BP, and halide ions and passivating dual interface defects. After forming Spiro-OMeTAD •+ TFSI –, GADET impedes the Li + ion diffusion through the ionic bond interaction of P-methylbenzenesulfonate anion and Li +, while the formation of the hydrogen bond of −NH 3 + with t BP can suppress the volatilization of t BP. Moreover, the halide ion migration and interfacial trap-induced nonradiative recombination are inhibited via passivating undercoordinated Pb and halide vacancy defects based on multiple chemical bonds. The synergistically modified devices achieve a champion efficiency of 25.06% (certified PCE of 24.08%). Meanwhile, the stability of PSCs was significantly improved.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China

Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China

Institute of High Energy Physics, Chinese Academy of Sciences (CAS), Beijing 100049, China

Department of Material Science and Technology, Taizhou University, Taizhou 318000, China

Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China

Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing 100190, China

Funding

Science and Technology Bureau of Xinjiang Production and Construction Corps · National Natural Science Foundation of China · Key Project of Chongqing Overseas Students Returning to China Entrepreneurship and Innovation Support Plan

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