Photovoltaic devices with a low band gap polymer and CdSe nanostructures exceeding 3% efficiency.
basic_science · Level V
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- Record sourced from PubMed, PMID 20000623.
- Also identified by DOI 10.1021/nl903406s.
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Abstract
We report the fabrication and measurement of solar cells approaching a power conversion efficiency of 3.2% using a low band gap conjugated polymer poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b']dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] and CdSe nanoparticles. These devices exhibit an external quantum efficiency (EQE) of >30% in a broad range of 350-800 nm with a maximum EQE of 55% in a range of 630-720 nm. We also present certified device efficiencies of 3.13% under AM 1.5 illumination.