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

[21a-P04-4] High-performance red-emissive perovskite quantum dots via room-temperature synthesis for wavelength conversion film

〇(B)Kenshin Yoshida¹, Naoaki Oshita², 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 dots, Red emission

ABX₃ typed perovskite quantum dot (PeQD) is a light source for the next generation of wavelength conversion films. Among the various PeQDs, red-emissive CsPbI3 PeQDs with high photoluminescence quantum yields (PLQY) still not have been established their synthesis method under room temperature ambient. This is due to using a polar solvent and insufficient passivation of PeQD surface defects. To solve these issues, in this work, we have fabricated the PeQDs by passivating octylammonium iodide on the PeQD surface defects via ionic metathesis reaction. As a result, red-emissive PeQDs have achieved PLQY of about 100% by room-temperature synthesis without a polar solvent. Moreover, we have succeeded in fabricating the perovskite-polymer composite films with superior stability by mixing the prepared PeQDs and resins.