Additive-free non-fullerene organic solar cells with random copolymers as donors over 9% power conversion efficiency
Additive-free non-fullerene organic solar cells with random copolymers as donors over 9% power conversion efficiency
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无添加剂%20非富勒烯%20有机%20太阳能%20细胞%20with%20随机%20共聚物%20as%20供体%20over%209%%20power%20conversion%20效率
DOI：
10.1016/j.cclet.2019.04.029
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发表时间：
2019-06
影响因子：
9.1
通讯作者：
Chen Yiwang
中科院分区：
文献类型：
--
作者：
Wu Meimei;Shi Laitao;Hu Yu;Chen Lie;Hu Ting;Zhang Youdi;Yuan Zhongyi;Chen Yiwang
本研究设计并合成了一系列随机共轭聚合物（PBDB-TBTn）作为给体。在这些聚合物中，带噻吩共轭侧链的苯并二噻吩单元（BDT）是给体部分，两种不同含量的苯并[1,2-c:4,5-c']二噻吩-4,8-二酮（BDD）和二氟苯并噻吩二唑（BT）连接的烷基噻吩是受体单元。以ITIC为受体制备聚合物太阳能电池（PSCs），获得了超过9%的功率转换效率（PCE），开路电压（V_(oc)）为0.86 V，短路电流密度（J_(sc)）为16.84 mA/cm~2，填充因子（FF）为62.5%。这些基于随机共轭聚合物的太阳能电池对溶剂添加剂和热退火不敏感。随着氟化受体单元比例的增加，器件的性能逐渐降低。效率下降的原因是由于过量的氟化受体单元导致了过度聚集的形貌，破坏了有效的电荷传输途径，并影响了供体和受体之间的相分离畴大小。利用载流子复合、原子力显微镜（AFM）和透射电子显微镜（TEM）对该现象进行了解释。这些结果表明，适当添加含氟受体单元来构建无规共聚物可以提高有机光伏电池向无添加剂和无热退火PSCs的效率。
In this study, a series of random conjugated polymers (PBDB-TBTn) as donors were designed and synthesized. In these polymers, benzodithiophene unit with thiophene conjugated side chains (BDT) are donor part, and two different content of benzo[ 1,2-c:4,5-c']dithiophene-4,8-dione (BDD) and difluorobenzothiadizole (BT) linked alkylthiophene are acceptor unit. Polymer solar cells (PSCs) were fabricated with ITIC as an acceptor, and over the power conversion efficiency (PCE) of 9% was obtained, with open circuit voltage (V_(oc))of 0.86 V, short-circuit current density (J_(sc)) of 16.84 mA/cm~2, and fill factor (FF) of 62.5%. These random conjugated polymers based solar cells are insensitive to solvent additives and thermal annealing. The performance of the device decreases gradually with the increasing of the proportion of fluorinated acceptor unit. The declining efficiency is due to the excessive fluorinated acceptor unit, which leads to over aggregated topography, destroys the effective charge transport pathways, and affects phase separation domain size between the donor and the acceptor. The phenomena are explained by the charge carrier recombination, atomic force microscope (AFM), and transmission electron microscope (TEM). These results indicate that proper addition of fluorinated acceptor units to build random copolymers can enhance the efficiency of organic photovoltaics toward additive-free and thermal annealing-free PSCs.
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DOI：
10.1007/s11426-014-5273-x
发表时间：
2015-01
期刊：
Science China Chemistry
影响因子：
--
作者：
Shaoqing Zhang;L. Ye;Wenchao Zhao;Bei Yang;Qi Wang;Jianhui Hou
通讯作者：
Shaoqing Zhang;L. Ye;Wenchao Zhao;Bei Yang;Qi Wang;Jianhui Hou
印刷%20非富勒烯%20有机%20太阳能%20细胞%20与%20%20最高%20效率%20的%209.5%
影响因子：
27.8
作者：
Lin, Yuanbao;Jin, Yingzhi;Hou, Lintao
通讯作者：
Hou, Lintao
影响因子：
29.4
作者：
A. Moulé;K. Meerholz
通讯作者：
A. Moulé;K. Meerholz
用于无添加剂高性能全聚合物太阳能电池的掺入染料的聚萘二亚胺受体
影响因子：
16.6
作者：
Chen, Dong;Yao, Jia;Li, Yongfang
通讯作者：
Li, Yongfang
三嗪核对基于 PDI 三聚体的小分子受体实现的光伏高效有机太阳能电池的显着影响
影响因子：
29.4
作者：
Duan, Yuwei;Xu, Xiaopeng;Peng, Qiang
通讯作者：
Peng, Qiang