Chang, Cheng-KaiCheng-KaiChangHwang, Jeong-YuanJeong-YuanHwangLai, Wei-JungWei-JungLaiChen, Chun-WeiChun-WeiChenHuang, Ching-IChing-IHuangChen, Kuei-HsienKuei-HsienChenCHING-I HUANG2012-10-242018-06-282012-10-242018-06-28201019327447http://ntur.lib.ntu.edu.tw//handle/246246/243875Solvent effects on the bulk heterojunction of poly(3-hexylthiophene) (P3HT) and single-walled carbon nanotubes (SWNTs) have been studied. Not only the morphology of P3HT but also the SWNT dispersion in P3HT matrix show strong dependence on the solvents. Atomic force microscopy images suggest that P3HT forms poor crystal structure in chloroform but better in solvents that have relatively high boiling points such as chlorobenzene, toluene, and o-xylene. However, the results of quench rate of photoluminescence and the exciton lifetime decay rate in SWNT/P3HT indicate that a good SWNT dispersion can only be obtained in chloroform and chlorobenzene cases. This suggests that more effective interfaces can be formed when these two solvents are used and thus leads to enhanced charge separation rate, which eventually will benefit the photovoltaic performance. Our photovoltaic demonstration further confirms the idea and suggests that using chlorobenzene for preparation of SWNT/P3HT photovoltaic devices will give more promising results. © 2010 American Chemical Society.en-US[SDGs]SDG7Atomic force; Bulk heterojunction; Charge separations; Decay rate; Exciton lifetime; matrix; O-xylene; Photovoltaic devices; Photovoltaic performance; Poly-3-hexylthiophene; Quench rate; Solvent effects; SWNT dispersions; Aromatic hydrocarbons; Atomic force microscopy; Carbon nanotubes; Chlorine compounds; Crystal atomic structure; Decay (organic); Dispersions; Heterojunctions; Single-walled carbon nanotubes (SWCN); Toluene; Xylene; Organic solventsjournal article10.1021/jp103601khttp://ntur.lib.ntu.edu.tw/bitstream/246246/243875/-1/319.pdf