writer：Liu WL, Liu RG*, Wang W, Li WW, Liu WY, Zheng K, Ma L, Tian Y, Bo ZS, Huang Y*
keywords：POLYMER SOLAR-CELLS; PHOTOVOLTAIC PROPERTIES; POLYFLUORENE COPOLYMER; HOLE MOBILITY; PERFORMANCE; C-60; BLENDS; METHANOFULLERENE; HETEROJUNCTIONS; POLYTHIOPHENES
source：期刊
specific source：Journal of Physical Chemistry C 2009, 113(26), 11385-11389
Issue time：2009年

We used solvent-vapor treatment methods to determine nanoscale phase separation and thus tailor the charge mobility of the poly(3-hexylthiophene)/fullerene (P3HT/C-60) blend films. The nanowires obtained by chloroform vapor treatment are rich in C-60, whereas the nanowires obtained by 1,2-dichlorobenzene (DCB) vapor treatment are rich in P3HT. The treated blends offer far superior hole transport than the untreated blends, which is attributed to nanoscale phase separation and a three-dimensional network containing C-60 or P3HT nanowires. Meanwhile, the electrically bicontinuous nanoscale morphology realized by controlling the crystallinity of P3HT and C-60 using different solvent-vapor results in enhanced absorption in visible light without further heat treatment or preparation in both cases. Solar cells fabricating from the films after treatment show several-fold improvements in power conversion efficiency compared to that of devices having films without treatment.