| 초록 |
Inorganic halide perovskites (IHPs) are significantly promising candidates for application in light-emitting diodes with high brightness and color tunability. However, IHPs transformed to suitable wide band gap have phase segregation. This phase segregation has severely limited their application due to the ion migration. In this study, we present 2-dimensional Ruddlesden-Popper structure constructed by n-butylammonium bromide which can synthesize increasing alkyl-chain-length. Long-alkyl-chain developed to have substantial passivation effect due to reduction in surface defect. Furthermore, we demonstrate controlled color-tunable from green to blue using band gap characteristics. band gap tuning via concentration tuning of n-butylammonium bromide, that makes in visible range from 520 nm to 490 nm. As a result, we were able to report data for green, cyan and sky-blue emitting perovskite LEDs with a maximum luminance value of 8150 cd/m2, 820 cd/m2 and 1450 cd/m2 respectively. |
