Integration of CulnS2-based nanocrystals for high efficiency and high colour rendering white light-emitting diodes

摘要

Here we explored the possibility of using CulnS2-based nanocrystals as colour converting materials for light-emitting applications. Using a mixture of red and green emissive CulnS2-based nanocrystals, we successfully fabricated high colour rendering white light-emitting diodes with surface mounted devices and high-power types. The devices exhibit improved luminous efficiency, high colour rendering index and tunable colour temperature. In particular, the low-power surface mounted devices have a luminous efficiency of ～70 Im Wv~(-1), CRI of ～95 and tunable colour temperature of 4600-5600 K, which makes the CulnS2-based nanocrystals promising candidates for commercial applications.