Synthesis of dopant-free hole transport materials enhances efficiency to 22.1% in perovskite solar cells, suggesting better stability.
Dopant-free HTMs SP-09 and SP-10 are synthesized via a simple method. SP-10 enables 22.1% efficiency and superior stability in PSCs, outperforming spiro-OMeTAD, offering a cost-effective route toward efficient and durable perovskite devices.
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Sabarinathan et al. (2025) studied this question.
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