ALKALI METALS IONS ADDITIVE FOR HIGHLY EFFICIENT PEROVSKITE SOLAR CELLS
발표자
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초록
내용
Organic-inorganic hybrid perovskite (OIHP)-based photovoltaic cells (PSCs) has emerged rapidly in the field of photovoltaics due to their great optoelectrical properties, simple manufacturing processes, and low- cost. However, non-radiative carrier recombination, which occurs in the interior of perovskite film and exterior of its interface, causes their instability and hampers their commercialization. In this work, we introduced alkali metal ions (Rb+, K+) in precursor solution as a dopant to reduce defect sites inducing non-radiative carrier recombination.The perovskite layer with additive prompted the process of crystallization and nucleation, resulting in compact film with large grain size, less grain boundaries, reduced defect sites. As a result, the alkali metal ions-doped perovskite-based solar cells showed improved efficiency and stability.