Tang Yuanhao, Ma Ke, Shao Wenhao, Lee Yoon Ho, Abtahi Ashkan, Sun Jiaonan, Yang Hanjun, Coffey Aidan H, Atapattu Harindi, Ahmed Mustafa, Hu Qixuan, Xu Wenzhan, Dani Raunak, Wang Limei, Zhu Chenhui, Graham Kenneth R, Mei Jianguo, Dou Letian
Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA.
Global Institute of Future Technology, Shanghai Jiao Tong University, Shanghai, 200240, China.
Small. 2025 Jan;21(1):e2408440. doi: 10.1002/smll.202408440. Epub 2024 Oct 28.
Despite the outstanding electric properties and cost-effectiveness of poly(3,4-ethylenedioxythiophene) (PEDOT) and its derivatives, their performance as hole transport layer (HTL) materials in conventional perovskite solar cells (PSCs) has lagged behind that of widely used spirobifluorene-based molecules or poly(triaryl amine). This gap is mainly from their poor solubility and energy alignment mismatch. In this work, the design and synthesis of a pyrrole-modified HTL (PPr) based on 3,4-propylenedioxythiophene (ProDOT) are presented for efficient and stable PSCs. As a result of the superior defects passivation ability, excellent contact with perovskite, enhanced hole extraction, and high hydrophobicity, the unencapsulated PPr-based PSCs showed the peak PCE of 21.49% and outstanding moisture stability (over 4000 h). This work highlights the potential application of ProDOT-based materials as HTL for PSCs and underscores the importance of the rational design of PEDOT and its derivatives.
尽管聚（3,4-乙撑二氧噻吩）（PEDOT）及其衍生物具有出色的电学性能和成本效益，但它们在传统钙钛矿太阳能电池（PSC）中作为空穴传输层（HTL）材料的性能却落后于广泛使用的螺二芴基分子或聚（三芳基胺）。这种差距主要源于它们较差的溶解性和能量排列不匹配。在这项工作中，提出了一种基于3,4-亚丙基二氧噻吩（ProDOT）的吡咯修饰的HTL（PPr）的设计与合成，用于高效稳定的PSC。由于具有优异的缺陷钝化能力、与钙钛矿的良好接触、增强的空穴提取能力和高疏水性，未封装的基于PPr的PSC显示出21.49%的峰值功率转换效率（PCE）和出色的湿度稳定性（超过4000小时）。这项工作突出了基于ProDOT的材料作为PSC的HTL的潜在应用，并强调了合理设计PEDOT及其衍生物的重要性。
