[21a-P04-1~11] 12.4 Organic light-emitting devices and organic transistors

[21a-P04-5] Perovskite quantum dot with high thermal stability by adding zinc bromide

〇Ryo Oba¹, Ryota Sato², Satoshi Asakura³, Takayuki Chiba^4,5, Akito Masuhara^2,5 (1.Fac. of Eng., Yamagata Univ., 2.Grad. Sch. of Sci. and Eng., Yamagata Univ., 3.Ise Chem. Corp, 4.Grad. Sch. of Org. Mat. Sci., Yamagata Univ., 5.FROM, Yamagata Univ.)

Keywords:perovskite, quantum dot, thermal stability

ABX₃ typed perovskite quantum dots (PeQDs) have attracted attention as a light source for next generation optical materials due to their excellent properties. However, because of low thermal stability on PeQDs, they have not been put to practical use. In detail, the optical properties of PeQDs were degraded under high temperature condition, which is because the ligand desorption of PeQD surface. As a result, it causes to collapse the PeQD crystal structure.
Herein, PeQDs with high thermal stability were successfully prepared by adding ZnBr₂ to solve these issues. As a result, PeQDs with ZnBr₂ maintained 83% of initial photoluminescence quantum yields after 12 hours at 100^oC.