Solution-Processed Transparent Conducting Electrodes for Flexible Organic Solar Cells with 16.61％ Efficiency

• 作者: Juanyong Wan Yonggao Xia Junfeng Fang Zhiguo Zhang Bingang Xu Jinzhao Wang Ling Ai Weijie Song Kwun Nam Hui Xi Fan Yongfang Li
• 来源期刊: 纳微快报（英文）
• 年，卷（期）: 2021,（3）
• 页码范围: 39-52
• 页数: 14页
• 语种: 英文

摘要

Nonfullerene organic solar cells (OSCs) have achieved break-through with pushing the Efficiency exceeding 17％. While this shed light on OSC commercialization, high-performance flexible OSCs should be pursued through solution manufacturing. Herein, we report a solution-processed flex-ible OSC based on a transparent conducting PEDOT:PSS anode doped with trifluoromethanesulfonic acid (CF3SO3H). Through a low-concentration and low-temperature CF3SO3H doping, the conducting polymer anodes exhibited a main sheet resistance of 35 Ω sq-1 (minimum value: 32 Ω sq-1), a raised work function (≈ 5.0 eV), a superior wettability, and a high electrical stability. The high work function minimized the energy level mismatch among the anodes, hole-transporting layers and electron-donors of the active layers, thereby leading to an enhanced carrier extraction. The solution-processed flexible OSCs yielded a record-high Efficiency of 16.41％ (maximum value: 16.61％). Besides, the flexible OSCs afforded the 1000 cyclic bending tests at the radius of 1.5 mm and the long-time thermal treatments at 85 °C, demonstrating a high flexibility and a good thermal stability.