Trap-induced losses in hybrid photovoltaics.
basic_science · Level V
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- Record sourced from PubMed, PMID 24606110.
- Also identified by DOI 10.1021/nn501185h.
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Abstract
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.