Effect of self-organization in polymer/fullerene bulk heterojunctions on solar cell performance
Vishal ShrotriyaUniversity of California Department of Materials Science and Engineering, , Los Angeles, Los Angeles, California 90095Yan YaoUniversity of California Department of Materials Science and Engineering, , Los Angeles, Los Angeles, California 90095Gang LiUniversity of California Department of Materials Science and Engineering, , Los Angeles, Los Angeles, California 90095Yang YangUniversity of California Department of Materials Science and Engineering, , Los Angeles, Los Angeles, California 90095
2006en
ABI
Аннотация
The authors investigate the effect of self-organization by controlling the growth rate on the performance of polymer/fullerene bulk-heterojunction solar cells. The effect of growth rate on the morphology of the active layer is studied by atomic force microscopy technique. The electrical characterization by dark current and photocurrent measurements is performed. The hole mobility in the polymer increases by about two orders in magnitude and the carrier transport becomes highly balanced. Increased exciton generation rate, more efficient electron-hole pair dissociation, higher carrier mobility, and balanced carrier transport in the active layer explain the enhancement in the short-circuit current and fill factor.
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