Highly Efficient Organic Solar Cells Consisting of Double Bulk Heterojunction Layers.
basic_science · Level V
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- Record sourced from PubMed, PMID 28295706.
- Also identified by DOI 10.1002/adma.201606729.
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Abstract
An organic solar cell (OSCs) containing double bulk heterojunction (BHJ) layers, namely, double-BHJ OSCs is constructed via stamp transferring of low bandgap BHJ atop of mediate bandgap active layers. Such devices allow a large gain in photocurrent to be obtained due to enhanced photoharvest, without suffering much from the fill factor drop usually seen in thick-layer-based devices. Overall, double-BHJ OSC with optimal ≈50 nm near-infrared PDPP3T:PC<sub>71</sub> BM layer atop of ≈200 nm PTB7-Th:PC<sub>71</sub> BM BHJ results in high power conversion efficiencies over 12%.