CsPbBr3-SiO2 복합 나노입자의 소결 조건 연구
Calcination Condition of CsPbBr3-SiO2 Composite Nanoparticles
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초록
할라이드 페로브스카이트 물질은 우수한 광전특성으로 인해 차세대 디스플레이에 응용시킬 물질로서 주목받고 있다. 본 연구에서는 다공성 SiO2 나노입자의 기공 내부에서 제한시킨 결정 성장을 통하여 할라이드 페로브스카이트의 안정성 문제를 해결한, CsPbBr3의 새로운 소결법을 제안한다. 최적의 소결 조건에서 소결된 CsPbBr3-SiO2 나노입자는 515 nm의 발광 피크를 나타낸다. CsPbBr3-SiO2 나노입자는 소결 과정 중 닫힌 기공에 말미암아 몇종의 극성 용매 속에서도 안정적으로 발광 특성을 유지할 수 있었으며, 이는 디스플레이용 색변환 필름으로서의 응용 가능성을 보여준다.
Abstract
Owing to the superior optoelectronic properties, halide perovskites have emerged as next-generation materials for display application. In this study, we reported a novel route for CsPbBr3 calcination into porous SiO2 nanoparticles to overcome the stability issues of halide perovskite via a spatial confinement of crystal growth within SiO2 pores. The resulting CsPbBr3-SiO2 nanoparticles exhibited the photoluminescence (PL) emission peak at 515 nm under optimal calcination condition. In several polar solvents, PL properties of CsPbBr3-SiO2 nanoparticles was maintained owing to the enclosed pores during calcination process, suggesting their promising application for display color conversion film.
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