Formation of a Fast Charge Transfer Channel in Quasi-2D Perovskite Solar Cells through External Electric Field Modulation
نویسندگان
چکیده
Quasi-2D perovskites solar cells exhibit excellent environmental stability, but relatively low photovoltaic properties, compared with 3D cells. However, charge transport and extraction in quasi-2D perovskite are still limited by the inevitable quantum well effect, resulting power conversion efficiency (PCE). To date, most efforts concentrate on crystal orientation favorable alignment during materials films processing. In this paper, we demonstrated that [(BA)2(MA)3Pb4I13 (n = 4)] show an optimized device performance through forming a fast transfer channel among 2D wells external electric field modulation, appropriate modulation bias time after has been fabricated. Essentially, ions will move directionally due to local polarization under action of modulation. More importantly, mobile function as dopant de-passivate defects when releasing at grain boundaries, while decreasing built-in potential applying forward proper time. The capacitance-voltage characteristics indicate can decrease accumulation improve collection Photoluminescence (PL) studies confirm non-radiative recombination is reduced leading enhanced transfer. Our work indicates effective method form wells, toward developing high–performance devices.
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ژورنال
عنوان ژورنال: Energies
سال: 2021
ISSN: ['1996-1073']
DOI: https://doi.org/10.3390/en14217402