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Simple transfer from spin coating to blade coating through processing aggregated solutions
Journal of Materials Chemistry A ( IF 11.9 ) Pub Date : 2017-09-22 00:00:00 , DOI: 10.1039/c7ta05214f
Jeff L. Hernandez 1, 2, 3, 4, 5 , Nabankur Deb 1, 2, 3, 4, 5 , Rylan M. W. Wolfe 1, 2, 3, 4, 5 , Chi Kin Lo 1, 2, 3, 4, 5 , Sebastian Engmann 6, 7, 8, 9 , Lee J. Richter 6, 7, 8, 9 , John R. Reynolds 1, 2, 3, 4, 5
Affiliation  

To develop an understanding of the effect spin coating or blade coating have on the morphology of polymer:fullerene thin films for organic solar cells, we have investigated the morphology of poly[5-(2-hexyldecyl)-1,3-thieno[3,4-c]pyrrole-4,6-dione-alt-5,5-(2,5-bis(3-dodecylthiophene-2-yl)-thiophene)] (P(T3-TPD)) blended with phenyl-C71-butyric acid methyl ester (PC71BM) using the solvent additive 1,8-diiodooctane (DIO). When P(T3-TPD) : PC71BM mixtures are cast with DIO, we observed a fivefold increase in power conversion efficiency (PCE) from 1% to >5% for both spin and blade coated devices. We found the morphology and OPV performance are remarkably similar for spin and blade coated films without having to re-optimize the processing solution or coating temperature. We attribute the robust coating behavior to processing an aggregated solution of P(T3-TPD) : PC71BM. Further, in order to gain insight into how the common solvent additive DIO enhances thin film morphology, in situ UV-vis absorbance and reflection spectroscopies, coupled with thin film morphology characterization, was performed to develop a mechanistic understanding of the solidification process. In situ and static measurements revealed that DIO increases the nucleation density, reducing domain size and additionally increases the polymer crystallinity and phase purity.

中文翻译:

通过处理聚集的溶液,可以轻松地从旋涂转移到刮涂

为了进一步了解旋涂或刮涂对有机太阳能电池用聚合物:富勒烯薄膜的形貌的影响,我们研究了聚[5-(2-己基癸基)-1,3-噻吩[3]的形貌。 ,4- ç ]吡咯-4,6- dione- ALT -5,5-(2,5-二(3-十二烷基噻吩-2-基) -噻吩)](P(T3-TPD))共混苯基使用溶剂添加剂1,8-二碘辛烷(DIO)制备C 71丁酸甲酯(PC 71 BM)。当P(T3-TPD)时  PC 71BM混合物是用DIO浇铸而成的,我们观察到旋涂和刮涂设备的功率转换效率(PCE)从1%增加到5%,增加了五倍。我们发现旋涂和刮涂的薄膜的形态和OPV性能非常相似,而不必重新优化处理溶液或涂布温度。我们将坚固的涂层性能归因于处理P(T3-TPD)  PC 71 BM的聚集溶液。此外,为了深入了解普通溶剂添加剂DIO如何增强薄膜形态,进行了原位UV-vis吸收和反射光谱分析,以及薄膜形态表征,以建立对固化过程的机械理解。原位 静态测量表明,DIO可增加成核密度,减小畴尺寸,并另外增加聚合物的结晶度和相纯度。
更新日期:2017-09-22
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