Sn 첨가에 따른 CH3NH3PbBr3 페로브스카이트 나노입자의 광학적 특성
Optical Properties of Sn-doped CH3NH3PbBr3 Perovskite Nanoparticles
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Methylammonium lead bromide (MAPbBr3) has attracted a lot of attention due to their excellent optoelectronic properties such as the compositional flexibility relevant to photoluminescence (PL) and UV-Vis absorbance spectrum, high diffusion length, and photoluminescence quantum yield (PLQY). Despite such advantages of organic-inorganic perovskite materials, more systematic study on manipulation of their optoelectronic properties in homo- or heterovalent metal ions doped halide perovskite nanocrystals is lacking. In this study, we systematically investigated the optical properties of colloidal CH3NH3Pb1-xSnxCl2xBr3-2x particles by addition of SnCl2 into the typical methylammonium lead tribromide (CH3NH3PbBr3) precursor solution. We found that only 1% addition of SnCl2 shows a significant blue-shift from 540 nm to 420 nm in UV-Vis absorbance spectrum due to the strong quantum confinement effect. Furthermore, continuous blue-shift in photoluminescence spectra was observed as the amount of Cl increases. These experimental results provide new insights into the replacement of Pb within MAPbBr3, required for the broadening of their application.
Abstract
Methylammonium lead bromide (MAPbBr3) has attracted a lot of attention due to their excellent optoelectronic properties such as the compositional flexibility relevant to photoluminescence (PL) and UV-Vis absorbance spectrum, high diffusion length, and photoluminescence quantum yield (PLQY). Despite such advantages of organic-inorganic perovskite materials, more systematic study on manipulation of their optoelectronic properties in homo- or heterovalent metal ions doped halide perovskite nanocrystals is lacking. In this study, we systematically investigated the optical properties of colloidal CH3NH3Pb1-xSnxCl2xBr3-2x particles by addition of SnCl2 into the typical methylammonium lead tribromide (CH3NH3PbBr3) precursor solution. We found that only 1% addition of SnCl2 shows a significant blue-shift from 540 nm to 420 nm in UV-Vis absorbance spectrum due to the strong quantum confinement effect. Furthermore, continuous blue-shift in photoluminescence spectra was observed as the amount of Cl increases. These experimental results provide new insights into the replacement of Pb within MAPbBr3, required for the broadening of their application.
참고문헌 (21)
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