Anti-solvent free process p-i-n perovskite solar cell using alkyl amines as additive
발표자
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초록
내용
We applied alkylamine ligands with different alkyl chain length as additive to improve perovskite film quality in 2-Methoxyethanol based anti-solvent free process. We identified that addition of oleylamine (OAm) with the long alkyl chain leaded to the most uniformed colloid size in precursor solution. Furthermore, we obtained the more flat film with the fewer number of pinholes as the alkyl chain length get longer. We measured In-situ GIWAXS about film formation during spin-coating to investigate the difference in film quality. As a result, we figured out that addition of alkyl amines leaded to fast crystallization with high crystallinity but also induced less aligned crystallite. A device with addition of OAm exhibited enhanced device performance (21.01%) in comparison with pristine 2ME based device (11.65%).