Zhang Xinyuan, Liu Chunyu, Li Jinfeng, He Yeyuan, Li Zhiqi, Li Hao, Shen Liang, Guo Wenbin, Ruan Shengping
State Key Laboratory on Integrated Optoelectronics, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China.
Phys Chem Chem Phys. 2015 Jun 28;17(24):16086-91. doi: 10.1039/c5cp01722j. Epub 2015 Jun 1.
In this study, molecular doping with polymer dots was designed to unravel its effect on the photoconductivity in organic solar cells. The photocurrent in organic solar cells exhibited a considerable increase under optimal doping concentration, leading to an ultimate enhancement of power conversion efficiency from 2.30% to 3.64%. This can be attributed primarily to the improvement of the initial boost in charge carriers due to the background carriers induced by the polymer dots and increased tail absorption by the active layer. Based on single carrier device and impedance measurements, polymer dopant can efficiently decrease charge recombination and improve charge carriers mobilities. The obtained achievements pave an approach of molecular doping in affecting the operation of organic solar cells.
在本研究中，设计了用聚合物量子点进行分子掺杂，以揭示其对有机太阳能电池光电导率的影响。在最佳掺杂浓度下，有机太阳能电池中的光电流显著增加，最终使功率转换效率从2.30%提高到3.64%。这主要归因于聚合物量子点诱导的背景载流子使电荷载流子的初始增强得到改善，以及活性层的尾部吸收增加。基于单载流子器件和阻抗测量，聚合物掺杂剂可以有效降低电荷复合并提高电荷载流子迁移率。所取得的成果为分子掺杂影响有机太阳能电池的运行开辟了一条途径。
