期刊
ACS NANO
卷 8, 期 4, 页码 3213-3221出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn501185h
关键词
hybrid solar cells; trap; charge transport and recombination; transient absorption; transient photocurrent; CdSe nanocrystals
类别
资金
- Cambridge Overseas Trust
- China Scholarship Council
- Engineering and Physical Sciences Research Council, U.K [EP/G060738/1]
- EPSRC [EP/E051804/1, EP/G060738/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G060738/1, EP/E051804/1] Funding Source: researchfish
We investigate the loss mechanisms in hybrid photovoltaics based on blends of poly(3-hexylthiophene) with CdSe nanocrystals of various sizes. By combining the spectroscopic and electrical measurements on working devices as well as films, we identify that high trap-mediated recombination is responsible for the loss of photogenerated charge carriers in devices with small nanocrystals. In addition, we demonstrate that the reduced open-circuit voltage for devices with small nanocrystals is also caused by the traps.
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