TY - JOUR
T1 - Nanoscale roughness control of electron transport layer in organic solar cells fabricated by sol-gel method
AU - Shiratori, Seimei
AU - Muraguchi, Kimiaki
PY - 2012/9/1
Y1 - 2012/9/1
N2 - ZnO films are widely used in the electronic transport layers of organic solar cells (OSCs) because of thier electron transport properties and high transparency. In this study, the surface structure of zinc oxide (ZnO) films was controlled using two organic solvents with different boiling points, and this was applied to inverted polymer solar cells. Two types of ZnO film were created through the sol-gel method. One had a fiber like rough surface and the other had a smooth surface structure. The resulting surface structure of a ZnO film is dependent on the relationship between the annealing temperature and boiling point of the organic solvent in the sol-gel solution. This study showed that the conversion efficiency of inverted organic solar cells (IOSCs) with a rough ZnO film was 60% higher than that with a smooth ZnO film. Judging from the current-voltage (I-V) characteristics of the IOSCs, there appears to be a positive correlation between the roughness of the surface structure of ZnO films and their conversion efficiency. In other words, the conversion efficiency increases with surface roughness.
AB - ZnO films are widely used in the electronic transport layers of organic solar cells (OSCs) because of thier electron transport properties and high transparency. In this study, the surface structure of zinc oxide (ZnO) films was controlled using two organic solvents with different boiling points, and this was applied to inverted polymer solar cells. Two types of ZnO film were created through the sol-gel method. One had a fiber like rough surface and the other had a smooth surface structure. The resulting surface structure of a ZnO film is dependent on the relationship between the annealing temperature and boiling point of the organic solvent in the sol-gel solution. This study showed that the conversion efficiency of inverted organic solar cells (IOSCs) with a rough ZnO film was 60% higher than that with a smooth ZnO film. Judging from the current-voltage (I-V) characteristics of the IOSCs, there appears to be a positive correlation between the roughness of the surface structure of ZnO films and their conversion efficiency. In other words, the conversion efficiency increases with surface roughness.
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U2 - 10.1143/JJAP.51.095803
DO - 10.1143/JJAP.51.095803
M3 - Article
AN - SCOPUS:84865834625
VL - 51
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 9
M1 - 095803
ER -