Proceedings of nanoGe Fall Meeting19 (NFM19)
Publication date: 18th July 2019
Light emitting diodes (LEDs) have gradually replaced traditional lighting as the next-generation lighting sources due to their low-energy consumption, long serving time, and high light efficiency. At present, the most widely adopted white LEDs are combinations of InGaN chip with YAG:Ce yellow phosphors. Rencently, healthy and high-quality lighting is drawing more attention as the intense blue emission from the commercial white LEDs was found responsible of negative effects on the body’s circadian clock and high color rendering index is required in some lighting areas. In this case, near-UV-pumped single-phase white light-emitting phosphors with high CRI are desired. Hybrid metal halides including hybrid perovskites have attracted a great attention as their emissions can be extremely broad, which offers rich opportunities for discovering single phase white light emitters. However, such emitters cannot reach an ultra-high CRI, because of the lack of either blue or/and red components. In addition, most of these emitters cannot reach a high PLQY.
In this poster, we will demonstrate that Mn doping in the hybrid post-perovskite type (TDMP)PbBr4 enables to achieve a bright pure white emission replicating the spectrum of the Sun’rays. a high photoluminescence quantum yield of 60% (new record for white light emission of hybrid lead halides), and an ultra-high color rendering index (CRI = 96, R9 = 91.8), corresponding to the record value for a single-phase emitter was obtained.
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