[21p-B101-1~8] 【Onsite Only】Creation and application of perovskite as a next-generation materials

△ [21p-B101-5] Control the emission wavelength on perovskite quantum dot based on band engineering for light emitting diode

〇Ryota Sato¹, Yusaku Morikawa¹, Satoshi Asakura², Takayuki Chiba^3,4, Akito Masuhara^1,4 (1.Grad. Sch. of Sci. and Eng., Yamagata Univ., 2.Ise Chem. Corp., 3.Grad. Sch. of Org. Mat. Sci., Yamagata Univ., 4.FROM, Yamagata Univ.)

Keywords:perovskite, quantum dot, control the emission wavelength

ABX₃ type perovskite quantum dot (PeQD) has attracted attention as a light source for next generation displays due to their excellent optical properties. Next generation displays require the light source to have the ideal emission wavelength (R: 630 nm, G: 532 nm, B: 467 nm) to satisfied BT.2020. The emission wavelength was precisely controlled in previous research to obtain the pinpointed wavelength by mixing the halide component and quantum size effects. However, the above method has a problem with the ion migration because of electrical/photo-excitation and particle aggregation, resulting in the initial emission wavelength not being maintained.
The band structure of PeQD was focused on to solve these issues, PeQD with controlled emission wavelength by only crystal lattice distortion was successfully prepared. The strategy to control the emission wavelength overcame the previous problems. As a result, the QLED device with an emission wavelength of 532 nm was successfully prepared.