Dopant-Free Hole-Transporting Materials for Stable and Efficient Perovskite Solar Cells.
basic_science · Level V
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- Record sourced from PubMed, PMID 28714259.
- Also identified by DOI 10.1002/adma.201606555.
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Abstract
Molecularly engineered novel dopant-free hole-transporting materials for perovskite solar cells (PSCs) combined with mixed-perovskite (FAPbI<sub>3</sub> )<sub>0.85</sub> (MAPbBr<sub>3</sub> )<sub>0.15</sub> (MA: CH<sub>3</sub> NH<sub>3</sub><sup>+</sup> , FA: NH=CHNH<sub>3</sub><sup>+</sup> ) that exhibit an excellent power conversion efficiency of 18.9% under AM 1.5 conditions are investigated. The mobilities of FA-CN, and TPA-CN are determined to be 1.2 × 10<sup>-4</sup> cm<sup>2</sup> V<sup>-1</sup> s<sup>-1</sup> and 1.1 × 10<sup>-4</sup> cm<sup>2</sup> V<sup>-1</sup> s<sup>-1</sup> , respectively. Exceptional stability up to 500 h is measured with the PSC based on FA-CN. Additionally, it is found that the maximum power output collected after 1300 h remained 65% of its initial value. This opens up new avenue for efficient and stable PSCs exploring new materials as alternatives to Spiro-OMeTAD.