Li Qingduan, Yang Jianwei, Chen Shuangshuang, Zou Jizhao, Xie Weiguang, Zeng Xierong
Shenzhen Key Laboratory of Special Functional Materials and Shenzhen Engineering Laboratory for Advance Technology of Ceramics, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, People's Republic of China.
Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, People's Republic of China.
Nanoscale Res Lett. 2017 Aug 23;12(1):506. doi: 10.1186/s11671-017-2276-5.
Efficient Si/organic hybrid solar cells were fabricated with dimethyl sulfoxide (DMSO) and surfactant-doped poly(3,4-ethylenedioxythiophene): polystyrene (PEDOT:PSS). A post-treatment on PEDOT:PSS films with polar solvent was performed to increase the device performance. We found that the performance of hybrid solar cells increase with the polarity of solvent. A high conductivity of 1105 S cm of PEDOT:PSS was achieved by adopting methanol treatment, and the best efficiency of corresponding hybrid solar cells reaches 12.22%. X-ray photoelectron spectroscopy (XPS) and RAMAN spectroscopy were utilized to conform to component changes of PEDOT:PSS films after solvent treatment. It was found that the removal of the insulator PSS from the film and the conformational changes are the determinants for the device performance enhancement. Electrochemical impedance spectroscopy (EIS) was used to investigate the recombination resistance and capacitance of methanol-treated and untreated hybrid solar cells, indicating that methanol-treated devices had a larger recombination resistance and capacitance. Our findings bring a simple and efficient way for improving the performance of hybrid solar cell.
采用二甲基亚砜（DMSO）和表面活性剂掺杂的聚（3,4-乙撑二氧噻吩）：聚苯乙烯（PEDOT:PSS）制备了高效的硅/有机混合太阳能电池。对PEDOT:PSS薄膜进行了极性溶剂后处理以提高器件性能。我们发现混合太阳能电池的性能随着溶剂极性的增加而提高。通过甲醇处理，PEDOT:PSS实现了1105 S/cm的高电导率，相应混合太阳能电池的最佳效率达到12.22%。利用X射线光电子能谱（XPS）和拉曼光谱来确定溶剂处理后PEDOT:PSS薄膜的成分变化。发现从薄膜中去除绝缘的PSS以及构象变化是器件性能提高的决定因素。采用电化学阻抗谱（EIS）研究了甲醇处理和未处理的混合太阳能电池的复合电阻和电容，表明甲醇处理的器件具有更大的复合电阻和电容。我们的研究结果为提高混合太阳能电池的性能带来了一种简单有效的方法。
