| 학회 | 한국공업화학회 |
| 학술대회 | 2022년 봄 (05/11 ~ 05/13, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 | 26권 1호 |
| 발표분야 | 포스터-디스플레이 |
| 제목 | Red hybrid Perovskites: Improved thermal and aqueous stability |
| 초록 | Increasing the stability of lead halide perovskites (LHPs) isrequired for integrating them into light-emitting devices. In this work, red-emittingCsPbI3−Cs4PbI6 hybrid nanocrystals (NCs) weresynthesized with a high photoluminescence (PL) quantum yield of 90%. Theirhybrid structure was examined via Rietveld refinement analysis and transmissionelectron microscopy. Rietveld refinement also revealed that the black polymorphof CsPbI3 NCs is an orthorhombic perovskite rather than a cubic one.The thermodynamic stability of the CsPbI3 NCs in Cs4PbI6matrices is enhanced in both solutions and films for up to several weeks. Theenhanced stability of the embedded CsPbI3 NCs is attributed to thelowering of their Gibbs free energy, as determined on the basis of experimentaldata. Additionally, the hybrid NCs exhibit unprecedented emission stabilitymaintaining 65% of their original PL efficiency at 150°C and improved aqueousstability. |
| 저자 | 조한빈, 임원빈 |
| 소속 | 한양대 |
| 키워드 | CsPbI3; Cs4PbI6; hybrid |
