International Display Workshops General Incorporated Association

Proceedings of the International Display Workshops Volume 26 (IDW '19)

Proceedings of the International Display Workshops Volume 26 (IDW '19)

Nov 27, 2019 - Nov 29, 2019
Sapporo Convention Center

6:10 PM - 6:25 PM

[OLED3-6L] Significance of Energy-Level Alignment in 3D Perovskite ELs Significance of Energy-Level Alignment in 3D Perovskite ELs

*KIHYUNG SIM1, HAYATO KAMIOKA2, JUNGHWAN KIM1, HIDEO HOSONO1 (1. Materials Research Center for Element Strategy, Tokyo Institute of Technology, (Japan), 2. Department of Physics, College of Humanities and Sciences, Nihon University (Japan))

Metal Halide Perovskite, Perovskite light-emitting diode (PeLED), Electron Transport layer (ETL), Exciton Confinement Effect, Charge Balance

https://doi.org/10.36463/idw.2019.0847

In this study, we report a significant phenomenon that EL performances for 3D materials, such as CsPbX3, are governed by adjacent charge transport layers, which is possibly due to nonradiative recombination resulting from the small exciton binding energy. To overcome this issue, we developed a new electron transport layer (ETL) that enhances exciton confinement effect in 3D CsPbX3. Consequently, we achieved ultra-high brightness of 500,000 cd/m2 at a very small operating voltage of 5V.