Influence of Composite Cathode of Ag/LiF/Al on the Performance of P3HT∶PCBM Solar Cells
ZHOU Jian-ping1, CHEN Xiao-hong2*, XU Zheng3
1. School of Power and Automation Engineering, Shanghai University of Electric Power, Shanghai 200090，China 2. Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, and Department of Physics, East China Normal University, Shanghai 200062, China 3. Key Laboratory of Luminescence and Optical Information of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China
Abstract：The improved photocurrent of regioregular poly(3-hexylthiophene) (P3HT) and 6,6-phenyl C61-butyric acid methylester (PCBM) based polymer solar cells (PSCs) using LiF and Al cathode, modified with a reasonable thin Ag layer, was demonstrated. Using an optimal 4nm Ag layer-modified electrode gave 20% improved short-circuit photocurrent density over PSCs with only LiF/Al cathode under AM1.5G illumination of 100 mW·cm-2. The increased short-circuit photocurrent density is ascribed to plasmon enhancement of the polymer absorption by nanotextured Ag film. The fill factor and open voltage of PSCs using Ag/LiF/Al cathode are decreased compared with the control PSCs with only LiF/Al cathode, which result in the decrease in power conversion efficiency of PSCs modified with Ag film. The possible reason for the deteriorated performance of PSCs with Ag/LiF/Al is stronger carrier recombination at nanotextured Ag.
Key words：Polymer solar cells;P3HT∶PCBM film;Surface plasmon;Nanotextured Ag film
周建萍1，陈晓红2*，徐 征3 . 复合阴极Ag/LiF/Al对P3HT∶PCBM太阳能电池性能的影响[J]. 光谱学与光谱分析, 2012, 32(07): 1865-1868.
ZHOU Jian-ping1, CHEN Xiao-hong2*, XU Zheng3 . Influence of Composite Cathode of Ag/LiF/Al on the Performance of P3HT∶PCBM Solar Cells. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(07): 1865-1868.
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