Center for Polymers and Organic Solids, Department of Physics, University of California, Santa Barbara, California 93106, USA.
J Am Chem Soc. 2011 Jun 8;133(22):8416-9. doi: 10.1021/ja2037673. Epub 2011 May 16.
The power conversion efficiencies of bulk heterojunction (BHJ) solar cells can be increased from 5 to 6.5% by incorporating an ultrathin conjugated polyelectrolyte (CPE) layer between the active layer and the metal cathode. Poly[N-9''-heptadecanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)] (PCDTBT) and [6,6]-phenyl C(71) butyric acid methyl ester (PC(71)BM) were chosen for the photoactive layer. CPEs with cationic polythiophenes, in both homopolymer and block copolymer configurations, were used to improve the electronic characteristics. The significant improvement in device performance and the simplicity of fabrication by solution processing suggest a promising and practical pathway for improving polymer solar cells with high efficiencies.
将超薄膜状的共轭聚合物电解质（CPE）置于活性层和金属阴极之间，可以将体异质结（BHJ）太阳能电池的功率转换效率从 5%提高到 6.5%。聚[N-9''-十七烷基-2,7-咔唑-alt-5,5-(4',7'-二噻吩-2',1',3-苯并噻二唑)]（PCDTBT）和[6,6]-苯基 C（71）丁酸甲酯（PC（71）BM）被选为光活性层。采用阳离子型聚噻吩均聚物和嵌段共聚物作为 CPE，以改善电子特性。通过溶液处理法制备的器件性能有了显著提高，且制备工艺简单，这为提高高效率聚合物太阳能电池提供了一种有前景且实用的方法。
