[15p-K402-1~9] 12.8 Specific theme: Photoelectric Properties, Device Fabrication and Structural Controls of Organic-Inorganic Hybrid Perovskites

2:45 PM - 3:00 PM JST(5:45 AM - 6:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[15p-K402-7] Synthesis of Narrow Bandwidth Pure-red Emission Perovskite Quantum Dots by Polar Solvents Free Room Temperature Synthesis and A-site Exchange with Lecithin

〇(M2)Kenshin Yoshida¹, Ryota Kobayashi², Satoshi Asakura³, Motofumi Kashiwagi⁴, Takayuki Chiba^2,5, Akito Masuhara^1,5 (1.Grad. Sch. of Sci. and Eng., Yamagata Univ., 2.Grad. Sch. of Org. Mat. Sci., Yamagata Univ., 3.Ise Chem. Corp., 4.Zeon Corp., 5.FROM, Yamagata Univ.)

Keywords:

Perovskite,Quantum dot,Red emission

Perovskite quantum dots (PeQDs) are semiconductor nanomaterials with excellent optical properties. In particular, their narrow full width at half maximum (FWHM) in the emission spectrum, which enables high color purity. This makes them promising candidates for light-emitting layers in ultra-high-definition television (UHDTV). Conventional synthesis method of red-emission PeQDs, such as room-temperature synthesis without polar solvents, can produce PeQDs with narrow FWHM. However, these methods face challenges in controlling particle size and emission wavelength through ligand adjustment during synthesis. In this study, we address the issue by tuning the emission wavelength through A-site cation exchange after PeQDs synthesis. Additionally, we successfully stabilized the wavelength control and minimized excessive crystal surface distortion by coordinating lecithin on the PeQDs surface during the A-site exchange process.