| 초록 |
To obtain white light emission, it is important for material to emit light with wavelengths throughout the visible spectral region. In this presentation, we introduce aromatic cations to Ruddlesden-Popper type lead halide perovskite lattices to induce multiple emission from metal halide framework and conjugated cation. In their film samples, we observe photoluminescence spectra of which wavelengths extending a whole range of visible light. Emission spectra are narrower in a high energy region, and relatively broader in a low energy region. According to the photoluminescence lifetime measurement, the emission spectra with a large Stokes shift region show hundreds microsecond scale of decay lifetime. Accordingly, long lifetime emission spectra are attributed to phosphorescence process arising from the aromatic organic cations. We realized white light in single materials utilizing triplet energy transfer from metal halide framework to light emitting organic cation. |
