Study of the effect of annealing process on the performance of P3HT/PCBM photovoltaic devices using scanning-probe microscopy
作者： Yu-Ching Huang , Yu-Chia Liao , Shao-Sian Li , Ming-Chung Wu , Chun-Wei Chen
DOI: 10.1016/J.SOLMAT.2008.10.027
关键词: Polymer solar cell 、 Scanning probe microscopy 、 Analytical chemistry 、 Materials science 、 Annealing (metallurgy) 、 Absorption spectroscopy 、 Heterojunction 、 Near-field scanning optical microscope 、 Optoelectronics 、 Composite number 、 Microscopy
摘要: Abstract We have studied the effect of annealing process on performance photovoltaic devices based bulk heterojunction poly(3-hexylthiophene) and [6,6]-phenyl-C 61 butyric acid methyl ester (P3HT/PCBM). By means atomic force microscopy (AFM) scanning near-field (SNOM), we can observe morphology evolution annealed P3HT/PCBM composite films. also changes optical properties by absorption spectroscopy composition distribution The results indicate P3HT in film gradually becomes an ordered structure with annealing. facilitates charge transport. However, exhibits a large-scale (1 μm) PCBM aggregation after for extended period time. disrupted bi-continous phase retards Thus, device efficiency reaches highest (2.308%) at 140 °C 30 min but decreases to 0.810% 60 min
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