Research on Efficiency Improvement of Inverted PTB7∶PC70BM Solar Cells Using ZnO Nanofibers Prepared by Electrospinning as Electron Transport Layer
SUN Qin-jun*, SHI Xiao-lei, GAO Li-yan, ZHOU Shao-long, WU Jun, HAO Yu-ying*
Key Lab of Advanced Transducers and Intelligent Control System of Ministry of Education and Taiyuan Province, College of Physics and Optoelectronic Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Abstract：In this paper, the effects of different diameters of ZnO nanofibers prepared by electrospinning on the conversion efficiency of organic solar cells were studied. First of all, ZnO nanofibers with diameters ranging from 43 to 110 nm were prepared by electrospinning technique. Then, ZnO nanofibers with different diameters were added to inverted organic solar cells (ITO/ZnO∶ZnO nanofiber/PTB7∶PC70BM/MoO3/Al) as electron transport layer. Compared to the planar ZnO electron transport layer, ZnO nanofibers have the advantages of large specific surface area, increasing the ability of electron transfer and extraction and improving the photoelectric conversion efficiency of the device. It was found that the smaller the diameter of ZnO nanofibers is, the greater the efficiency of the cells will be. When the diameter of ZnO nanofibers was (46±5) nm and the receiving time was 30 s, conversion efficiency of the cell increased by 8%.
Key words：Electrospinning；Nanofibers；Electron transport；Short circuit current density；Photoelectric conversion efficiency
孙钦军，石晓磊，高利岩，周少龙，吴 俊，郝玉英. 电纺ZnO纳米纤维电子传输层提高倒置PTB7∶PC70BM电池效率[J]. 光谱学与光谱分析, 2018, 38(11): 3368-3373.
SUN Qin-jun, SHI Xiao-lei, GAO Li-yan, ZHOU Shao-long, WU Jun, HAO Yu-ying. Research on Efficiency Improvement of Inverted PTB7∶PC70BM Solar Cells Using ZnO Nanofibers Prepared by Electrospinning as Electron Transport Layer. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 38(11): 3368-3373.
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