Breaking 12％ efficiency in flexible organic solar cells by using a composite electrode

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2019,（7）
• 页码范围: 851-858
• 页数: 8页
• 语种: 英文

摘要

The performance of flexible organic solar cells (OSCs) significantly relies on the quality of transparent flexible electrode.Here,we used silver nanowires (AgNWs) with various weight ratios to dope high-conductive poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PH1000) to optimize the optical and electronic properties of PH1000 film.A high-quality flexible composite electrode PET/Ag-mesh/PH1000:AgNWs-20 with smooth surface,a low sheet resistance of 6 Ω/sq and a high transmittance of 86％ at 550-nm wavelength was obtained by doping 20 wt％ AgNWs to PH1000 (PH1000:AgNWs-20).The flexible OSCs based on the PET/Ag-mesh/PH1000:AgNWs-20 electrode delivered a power conversion efficiency (PCE) of 12.07％ with an open circuit voltage (Voc) of 0.826 V,a short-circuit current density (J~) of 20.90 mA/cm2 and a fill factor (FF) of 69.87％,which is the highest reported PCE for the flexible indium-tin oxide (ITO)-free OSCs.This work demonstrated that the flexible composite electrodes of PET/Ag-mesh/PH1000:AgNWs are promising alternatives for the conventional PET/ITO electrode,and open a new avenue for developing high-performance flexible transparent electrode for optoelectronic devices.