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Updated: Sep 13, 2026
In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
Published on: March 2, 2021
A dual-functional surface passivator enables ETL-free perovskite solar cells to exhibit 23.71% efficiency
Chengxu Yang1, Jiakang Zhang1, Bingqian Zhang1,2
1State Key Laboratory of Advanced Optical Polymer and Manufacturing Technology, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China. b024050016@mails.qust.edu.cn.
Abstract:
ETL-free perovskite solar cells (PSCs) draw attention due to their simple structure and low cost, yet suffer from severe interfacial-defect-induced performance and stability degradation. Herein, 2-aminobenzimidazole (2-ABD) is employed as a bifunctional perovskite-surface passivator. It passivates lead defects via Pb-N coordination and immobilizes iodide ions through N-H⋯I- hydrogen-bond networks, synergistically optimizing interfacial energetics and carrier transport. The modified device delivers a champion efficiency of 23.71% and maintains 94.53% of its initial performance after 1200 h of MPP tracking. This work provides a new strategy for interfacial passivation of ETL-free perovskite photovoltaics.
