2024年8月23日，ACS旗下top期刊《ACS Sustainable Chemistry & Engineering》在线发表了云南师范大学物理与电子信息学院王洪恩教授最新研究成果《Synergistic Interface Optimization of Inverted Methylamine-Free Perovskite Solar Cells: A Study of Experiments, Calculations, and Numerical Simulations》。云南师范大学物理与电子信息学院为第一作者单位，王洪恩教授为通讯作者。

https://pubs.acs.org/doi/10.1021/acssuschemeng.4c04732

Abstract

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The power conversion efficiencies (PCEs) of inverted methylammonium (MA)-free perovskite solar cells (PSCs) have yet to match those of their tricationic counterparts and conventional PSCs, due in part to suboptimal carrier transport, the inadequate morphology of hole transport layers (HTLs), and the inferior crystallinity of MA-free perovskite films. Herein, we address these challenges by introducing a nickel oxide (NiOx) film as a nucleation layer to facilitate the formation of a dense and uniform self-assembled monolayer of 2-(3,6-dimethoxycarbazol-9-yl)ethylphosphonic acid (MeO-2PACz) as an HTL bilayer, which enhances the crystallinity of the perovskite and improves the energy level alignment between the HTL and the perovskite at the buried interface. Subsequent top surface passivation with 2-phenylethylamine hydroiodide (PEAI) results in the formation of a 2D/3D heterojunction perovskite, leading to a high PCE of 22.91% and excellent long-term operational stability in the resulting device. SCAPS-1D numerical simulations elucidate that the structure of the buried interface significantly impacts PCEs, considering the effects of interface defects, perovskite bulk defects, and interface energy level alignment on device performance. Comprehensive simulations predict an optimal device configuration capable of achieving a PCE of 27.35%. This investigation offers novel insights into the interface properties of cesium-formamidinium (CsFA)-based perovskites and the consequences of energy level shifts, advancing the field of MA-free PSC design and optimization.

拓展阅读：

云师大物电学院王洪恩教授在《Journal of Colloid and Interface Scienc》发表研究成果

云师大王洪恩教授与浙工大郑华均教授等在《Advanced Energy Materials》上合作发表最新研究成果

云师大王洪恩教授在top期刊《INFOMAT》上合作发表最新研究成果

云师大王洪恩教授在《Journal of Materials Chemistry A》上发表最新研究成果

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