Zhang Guoping, Wang Lihong, Zhao Chaoyue, Wang Yajie, Hu Ruiyu, Che Jiaxu, He Siying, Chen Wei, Cao Leifeng, Luo Zhenghui, Qiu Mingxia, Li Shunpu, Zhang Guangye
College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China.
College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, China.
Polymers (Basel). 2022 Sep 14;14(18):3835. doi: 10.3390/polym14183835.
All-polymer solar cells (all-PSCs) are organic solar cells in which both the electron donor and the acceptor are polymers and are considered more promising in large-scale production. Thanks to the polymerizing small molecule acceptor strategy, the power conversion efficiency of all-PSCs has ushered in a leap in recent years. However, due to the electrical properties of polymerized small-molecule acceptors (PSMAs), the FF of the devices is generally not high. The typical electron transport material widely used in these devices is PNDIT-F3N, and it is a common strategy to improve the device fill factor (FF) through interface engineering. This work improves the efficiency of all-polymer solar cells through interfacial layer engineering. Using PDINN as the electron transport layer, we boost the FF of the devices from 69.21% to 72.05% and the power conversion efficiency (PCE) from 15.47% to 16.41%. This is the highest efficiency for a PY-IT-based binary all-polymer solar cell. This improvement is demonstrated in different all-polymer material systems.
全聚合物太阳能电池（all-PSC）是指电子供体和受体均为聚合物的有机太阳能电池，被认为在大规模生产中更具前景。得益于聚合小分子受体策略，近年来全聚合物太阳能电池的功率转换效率实现了飞跃。然而，由于聚合小分子受体（PSMA）的电学性质，器件的填充因子通常不高。这些器件中广泛使用的典型电子传输材料是PNDIT-F3N，通过界面工程提高器件填充因子（FF）是一种常见策略。这项工作通过界面层工程提高了全聚合物太阳能电池的效率。使用PDINN作为电子传输层，我们将器件的填充因子从69.21%提高到72.05%，功率转换效率（PCE）从15.47%提高到16.41%。这是基于PY-IT的二元全聚合物太阳能电池的最高效率。这种改进在不同的全聚合物材料体系中得到了验证。
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