期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 6, 期 6, 页码 1766-1771出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ee40457a
关键词
-
资金
- Center for Energy Efficient Materials, an Energy Frontier Research Center
- US Department of Energy, Office of Basic Energy Sciences [DESC0001009]
White light photoconductive atomic force microscopy (pc-AFM) was employed to evaluate nanoscale open circuit (V-oc) at high light intensities (up to 200 sun) of three donor: acceptor blends comprising two widely studied polymers and one small molecule donor material. By varying the work function of electron extraction contacts, the V-oc observed in nanoscale measurements reveals a unified dependence on the electrode work functions regardless of the blend materials; in line with earlier macroscopic measurements at 1 sun. At high light intensities, an agreement between the nanoscale and bulk V-oc is observed. Nonetheless, light intensity dependent V-oc measurements suggest that under high light intensities, the V-oc obtained by pc-AFM exhibits contact-limited behavior.
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