上海应用技术大学李向清团队报道了，通过原位界面重建实现20%以上效率的，无HTM层压碳电极钙钛矿太阳能电池。相关研究成果发表在2024年12月26日出版的国际学术期刊《德国应用化学》。

将自支撑碳电极薄膜层压结到钙钛矿薄膜上，是一种有前景的制造无HTM（空穴传输材料）碳电极钙钛矿太阳能电池（c-PSCs）的方法，通过解耦碳电极和钙钛矿层形成过程提供了更大的灵活性。然而，与具有印刷碳浆的c-PSCs（>20%）相比，由于钙钛矿和碳层之间的界面接触不良，层压无HTM c-PSCs的功率转换效率（PCE）仍然较低（<16.5%）。

该文中，研究人员报告了一种化学机械驱动的原位界面重建策略，以解决此类界面接触问题。原位界面重建首先由甲基氯化铵（MACl）表面处理触发化学活化薄膜，然后在加热下将碳电极机械层压结到软化的钙钛矿薄膜上。

钙钛矿薄膜经历原位再生，碳薄膜同时开始固化，动态重建钙钛矿/碳电极界面。实现了更紧密和共形的接触，极大地促进了载体的运输和提取。最终，通过增强稳定性实现了20.31%的最优PCE。

该原位界面重建策略综合了化学和机械过程，为进一步设计低成本、高效的无HTM c-PSCs提供了新的选择。

附：英文原文

Title: Achieving over 20% Efficiency in Laminated HTM-Free Carbon Electrode Perovskite Solar Cells through In Situ Interface Reconstruction

Author: Guopeng Huang, Taiyang Zhang, Weidong Lin, Lixia Qin, Shi-Zhao Kang, Xiangqing Li

Issue&Volume: 2024-12-26

Abstract: Laminating a free-standing carbon electrode film onto perovskite film is a promising method for fabricating HTM (hole transport material)-free carbon electrode perovskite solar cells (c-PSCs), offering more flexibility by decoupling the processes of carbon electrode and perovskite layer formation. However, the power conversion efficiency (PCE) of laminated HTM-free c-PSCs (<16.5%) remains lower compared to c-PSCs with printed carbon pastes (>20%), primarily due to poor interfacial contact between the perovskite and carbon layers. Herein, we report a chemical-mechanical driven in-situ interface reconstruction strategy to solve such interface contact issues. The in-situ interface reconstruction is firstly triggered by methylammonium chloride (MACl) surface treatment to chemically activate the film and then mechanically laminate the carbon electrode onto the softened perovskite film under heating. The perovskite film undergoes in-situ regrowth and the carbon film starts to cure simultaneously, dynamically reconstructing the perovskite/carbon electrode interface. A tighter and conformal contact is achieved, greatly facilitating the carrier transport and extract. Ultimately, a champion PCE of 20.31% is achieved with enhanced stability. Our in-situ interface reconstruction strategy which is bombinating the chemical and mechanical process offers a new choice for the further design of low-cost and efficient HTM-free c-PSCs.

DOI: 10.1002/anie.202420687

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202420687