Synergistic doping of fullerene electron transport layer and colloidal quantum dot solids enhances solar cell performance.
basic_science · Level V
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- Record sourced from PubMed, PMID 25504558.
- Also identified by DOI 10.1002/adma.201404411.
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Abstract
The spatial location of the predominant source of performance-limiting recombination in today's best colloidal quantum dot (CQD) cells is identified, pinpointing the TiO2:CQD junction; then, a highly n-doped PCBM layer is introduced at the CQD:TiO2 heterointerface. An n-doped PCBM layer is essential to maintain the depletion region and allow for efficient current extraction, thereby producing a record 8.9% in overall power conversion efficiency.