Experimental study demonstrates a 21.59% power conversion efficiency in perovskite solar cells using a novel hole-transport material, suggesting a viable low-cost alternative to spiro-OMeTAD.
Hole-transporting material (HTM) plays an important role in PSCs. We report a novel and low-cost, bifluorenylidene-based HTM, denoted as sp-35, which achieved a high PCE of 21.59% and demonstrated good long-term stability compared to spiro-OMeTAD.
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Kumar et al. (2025) studied this question.
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