[20p-A35-1~9] 3.12 Semiconductor optical devices

2:15 PM - 2:30 PM JST(5:15 AM - 5:30 AM UTC)

[20p-A35-4] Observation of Electroluminescence in Single CsPbBr₃ Perovskite Nanocrystals

〇(DC)Toranosuke Takagi¹, Shun Omagari¹, Martin Vacha¹ (1.Tokyo Tech)

Keywords:

Perovskite Nanocrystal,Electroluminescence,Single Particle Spectroscopy

We studied electroluminescence (EL) of single CsPbBr₃ perovskite nanocrystals using single-particle spectroscopy. By appropriately layering an insulating layer of suitable thickness on top of the single nanocrystals dispersed on a hole-conducting substrate, we promoted efficient charge recombination within the single nanocrystals. The EL blinking behavior was characterized by spike-like emission with varying intensities, rather than the two-level on-off behavior observed in photoluminescence (PL) blinking. The EL spectrum, similar to the PL spectrum, exhibited a narrow emission linewidth.