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Solid additive tuning of polymer blend morphology enables non-halogenated-solvent all-polymer solar cells with an efficiency of over 17%
Energy & Environmental Science ( IF 32.5 ) Pub Date : 2022-08-12 , DOI: 10.1039/d2ee01727j
Ke Hu , Can Zhu , Lei Meng , Kan Ding , Shucheng Qin , Wenbin Lai , Jiaqi Du , Jianqi Zhang , Zhixiang Wei , Xiaojun Li , Zhanjun Zhang , Harald Ade , Yongfang Li

All-polymer solar cells (all-PSCs) have attracted considerable interest owing to their superior device stability and mechanical robustness. Recently, all-PSCs have achieved high power conversion efficiency (PCE) of over 17% benefitting from the development of polymerized small molecular acceptors. However, most all-PSCs are processed using halogenated solvents that are hazardous to the environment. Herein, non-halogenated solvent toluene is utilized with a large amount of volatilizable DTT (dithieno[3,2-b:2′,3′-d]thiophene) solid additive, for eco-friendly and highly efficient all-PSCs. The DTT solid-additive treatment can fine-tune the aggregation of the polymer donor and polymer acceptors, and the resulting active layer possesses appropriate domain size and high domain purity with bi-continuous-interpenetrating networks. Consequently, the treatment of DTT additive enables the high-performance non-halogenated solvent processed all-PSCs based on PBQ6:PYF-T-o with PCE up to 17.06% (certified PCE of 16.6%), which is among the highest efficiencies in non-halogenated-solvent-processed all-PSCs to date. Importantly, the toluene-processed active layer of all-PSCs can be successfully fabricated under ambient conditions with the help of the DTT additive, and the device fabricated under ambient conditions showed a higher PCE of 15.74%. This study highlights the importance of a solid-additive strategy in controlling the active layer morphology for practical applications of high-performance and environment-friendly all-PSCs.

中文翻译:

聚合物共混物形态的固体添加剂调整使非卤化溶剂全聚合物太阳能电池的效率超过 17%

全聚合物太阳能电池(all-PSC)由于其优异的器件稳定性和机械鲁棒性而引起了相当大的兴趣。最近,得益于聚合小分子受体的发展,全PSCs已经实现了超过17%的高功率转换效率(PCE)。然而,大多数全 PSC 使用对环境有害的卤化溶剂进行加工。在此,非卤化溶剂甲苯与大量可挥发的 DTT(二噻吩并[3,2- b :2',3'- d]噻吩)固体添加剂,用于环保和高效的全 PSC。DTT固体添加剂处理可以微调聚合物供体和聚合物受体的聚集,所得活性层具有合适的畴尺寸和高畴纯度,具有双连续互穿网络。因此,对 DTT 添加剂的处理使基于 PBQ6:PYF-T- o的高性能非卤化溶剂处理的全 PSC 成为可能PCE 高达 17.06%(经认证的 PCE 为 16.6%),这是迄今为止非卤化溶剂处理的全 PSC 的最高效率之一。重要的是,甲苯处理的全 PSC 活性层可以在环境条件下在 DTT 添加剂的帮助下成功制造,并且在环境条件下制造的器件显示出 15.74% 的更高 PCE。本研究强调了固体添加剂策略在控制活性层形态对于高性能和环保型全 PSC 的实际应用中的重要性。
更新日期:2022-08-12
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