Zhang Wenna, Bu Fanchen, Shen Wenfei, Qi Xiaohua, Yang Na, Chen Mengyao, Yang Di, Wang Yao, Zhang Miaorong, Jiang Haoyang, Strizhak Peter, Tang Jianguo
Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Sci. & Tech. Cooperation on Hybrid Materials, Qingdao University 308 Ningxia Road Qingdao 266071 P. R. China
L.V. Pysarzhevsky Institute of Physical Chemistry, National Academy of Sciences of Ukraine, Ukrainian Academy of Sciences 31 prosp. Nauky Kyiv 03028 Ukraine
RSC Adv. 2020 Jul 2;10(42):24847-24854. doi: 10.1039/d0ra03461d. eCollection 2020 Jun 29.
Single-walled carbon nanotubes (SWNTs) have good conductivity, but their size can't match the heterojunction nanostructure in polymer solar cells (PSCs). To improve the photovoltaic performance of PSCs, herein, a faciley fabricated composite hole transport layer composed of unzipped single-walled carbon nanotubes (uSWNTs) and poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) is effectively applied for PSC devices. Compared with the pure PEDOT:PSS hole transport layer (HTL) without uSWNTs, the uSWNTs/PEDOT:PSS layer shows more effective performance as the hole transportation layer. Optimizing the uSWNT concentration in PEDOT:PSS results in fabrication of the PSC devices with uSWNTs/PEDOT:PSS hole transport layers that exhibit greatly improved average power conversion efficiency (PCE), from 13.72% to 14.60%, and greatly enhanced current density and fill factor, which can be ascribed to the increased conductivity and hole transport efficiency. Our approach also supports simple solution-processing techniques and the insensitivity of the performance to thickness, which promises that the faciley fabricated uSWNTs/PEDOT:PSS layer has more potential to be applicable to the roll-to-roll process of PSC fabrication with extremely low cost.
单壁碳纳米管（SWNTs）具有良好的导电性，但其尺寸无法与聚合物太阳能电池（PSC）中的异质结纳米结构相匹配。为了提高PSC的光伏性能，本文将一种由开链单壁碳纳米管（uSWNTs）和聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT:PSS）组成的易于制备的复合空穴传输层有效地应用于PSC器件。与不含uSWNTs的纯PEDOT:PSS空穴传输层（HTL）相比，uSWNTs/PEDOT:PSS层作为空穴传输层表现出更有效的性能。优化PEDOT:PSS中uSWNT的浓度可制备出具有uSWNTs/PEDOT:PSS空穴传输层的PSC器件，其平均功率转换效率（PCE）从13.72%大幅提高到14.60%，电流密度和填充因子也大大增强，这可归因于导电性和空穴传输效率的提高。我们的方法还支持简单的溶液处理技术，且性能对厚度不敏感，这表明易于制备的uSWNTs/PEDOT:PSS层有更大的潜力以极低的成本应用于PSC制造的卷对卷工艺。
