Abstract
Metal particles with excellent conductivity can be used as additives to ameliorate the performance of perovskite solar cells (PSCs). However, it is formidable to generate stable liquid metal particles especially quantum dots because of the room-temperature fluidity. Herein, in this work, eutectic gallium-indium liquid metal quantum dots (GIQDs) were prepared via pulsed laser irradiation in anti-solvent and incorporated in perovskite film to accelerate electron transport due to the superior conductivity. As a result, the charge transport resistance was decreased, leading to the fast quenching effect and short carrier lifetime at the surface of perovskite film, which were verified by steady-state and time-resolved photoluminescence. Besides, the reduced charge recombination contributed to the enhancement of current density. Moreover, after the optimization of 0.1 mg/mL GIQDs incorporated in perovskite film, the power conversion efficiency of PSCs obtained a champion value of 15.55%, which improved 17.18% when compared with pristine samples of 13.27%. This article will pave the way for binary liquid metal synthesizing and optoelectronic applications.
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