Efficient and 1,8-diiodooctane-free ternary organic solar cells fabricated via nanoscale morphology tuning using small-molecule dye additive
Efficient and 1,8-diiodooctane-free ternary organic solar cells fabricated via nanoscale morphology tuning using small-molecule dye additive
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使用小分子染料添加剂通过纳米级形貌调整制造高效且不含 1,8-二碘辛烷的三元有机太阳能电池
DOI：
10.1007/s12274-017-1589-0
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发表时间：
2017
期刊：
影响因子：
9.9
通讯作者：
Chen Hongzheng
中科院分区：
文献类型：
--
作者：
Zhang Shuhua;Shah Muhammad Naeem;Liu Feng;Zhang Zhongqiang;Hu Qin;Russell Thomas P.;Shi Minmin;Li Chang-Zhi;Chen Hongzheng
将多个光子敏感元件整合到单个结中的三元策略已成为优化纳米级形貌和提高有机太阳能电池（OSC）器件性能的有效方法。本研究通过引入小分子染料(5E,5′E)-5,5′-(4′,4″-(1,2-二苯基乙烯-1,2-二基)双(联苯-4′,4-二基))双(甲烷-1-基-1-亚基)双(3-乙基-2-硫代唑啉-4-一)获得了高效稳定的三元OSCs。 (BTPE-Rn) 转化为聚[4,8-双(5-(2-乙基己基)噻吩-2-基)苯并[1,2-b:4,5-b']二噻吩-共-3-氟噻吩并[3,4-b]噻吩-2-羧酸酯] (PTB7-Th):[6,6]-苯基 C71 丁酸甲酯 (PC71BM) 共混薄膜，使用不含 1,8-二碘辛烷 (DIO) 的溶剂。与二元OSC相比，BTPE-Rn的加入提高了三元OSC的短路电流密度和填充因子。对三元共混物的光学、电子和形态特性的研究表明，BTPE-Rn 的第三种组分不仅通过能量转移过程促进了共混物的光子利用，而且由于富含富勒烯的纳米相优化，还提高了共混物的电子迁移率。更重要的是，这种利用小分子染料代替光不稳定的DIO添加剂的三元策略增强了OSC的运行稳定性。
The ternary strategy for incorporating multiple photon-sensitive components into a single junction has emerged as an effective method for optimizing the nanoscale morphology and improving the device performance of organic solar cells (OSCs). In this study, efficient and stable ternary OSCs were achieved by introducing the small-molecule dye (5E,5′E)-5,5′-(4′,4″-(1,2-diphenylethene-1,2-diyl)bis(biphenyl-4′,4-diyl))bis(methan-1-yl-1-ylidene)bis(3-ethyl-2-thioxothia zolidin-4-one) (BTPE-Rn) into poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b′]dithiophene-co-3-fluorothieno[3,4-b]thiophene-2-carboxylate] (PTB7-Th):[6,6]-phenyl C71 butyric acid methyl ester (PC71BM) blend films processed using a 1,8-diiodooctane (DIO)-free solvent. The incorporation of BTPE-Rn enhanced the short-circuit current density and fill factor of the ternary OSCs compared with those of binary OSCs. An investigation of the optical, electronic, and morphological properties of the ternary blends indicated that the third component of BTPE-Rn not only promoted the photon utilization of blends through the energy-transfer process but also improved the electron mobility of the blends owing to the fullerene-rich nanophase optimization. More importantly, this ternary strategy of utilizing a small-molecule dye to replace the photounstable DIO additive enhanced the operational stability of the OSCs.