The team also developed a redox-active radical polymer called poly(oxoammonium salt) that effectively “p-dopes” the hole-transporting material – a crucial component of the PSCs. The polymer, acting as a “p-dopant,” improves the conductivity and stability of the hole-transporting material, a crucial component of the cells. The process of “p-doping” involves introducing mobile charge electronic charge carriers into the material to improve its conductivity and stability, and in this case mitigated the diffusion of lithium ions, a major problem that contributes to the operational instability of PSCs.
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