Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology , Taiyuan 030024, China.
Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University , Yanchang Road 149, Shanghai 200072, China.
ACS Appl Mater Interfaces. 2018 Feb 7;10(5):4895-4903. doi: 10.1021/acsami.7b17969. Epub 2018 Jan 26.
In this work, we report the effort to develop high-efficiency inverted polymer solar cells (PSCs) by applying a solution-processable bilayer ZnO/carbon quantum dots (C-QDs) electron extraction layer (EEL). It is shown that the use of the bilayer EEL helps to suppress the exciton quenching by passivating the ZnO surface defects in the EEL, leading to an enhanced exciton dissociation, reduced charge recombination and more efficient charge extraction probability, and thereby achieving high power conversion efficiency (PCE). The inverted PSCs, based on the blend of poly{4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl-alt-3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophene-4,6-diyl} and [6,6]-phenyl C71-butyric acid methyl ester, possess a significant improvement in PCE of ∼9.64%, which is >27% higher than that of a control cell (∼7.59%). The use of a bilayer ZnO/C-QD EEL offers a promising approach for attaining high-efficiency inverted PSCs.
在这项工作中，我们报告了通过应用可溶液处理的双层 ZnO/碳量子点 (C-QD) 电子萃取层 (EEL) 来开发高效倒置聚合物太阳能电池 (PSC) 的努力。结果表明，使用双层 EEL 有助于通过钝化 EEL 中的 ZnO 表面缺陷来抑制激子猝灭，从而增强激子解离、减少电荷复合和提高有效的电荷提取概率，从而实现高功率转换效率 (PCE)。基于聚{4,8-双[(2-乙基己基)氧基]苯并[1,2-b:4,5-b']二噻吩-2,6-二基--alt-3-氟-2-[(2-乙基己基)羰基]噻吩[3,4-b]噻吩-4,6-二基}和[6,6]-苯基 C71-丁酸甲酯的混合物的倒置 PSC，在 PCE 方面有显著提高，约为 9.64%，比对照电池（约 7.59%）高>27%。使用双层 ZnO/C-QD EEL 为实现高效倒置 PSC 提供了一种很有前途的方法。
