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

1:15 PM - 1:30 PM JST(4:15 AM - 4:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[15p-K402-2] Development of green CsPbBr₃ nanocrystal LEDs with high-brightness and long device lifetime based on wavelength conversion technology

〇(M2)Daisuke Yokota¹, Kento Yanagihashi², Shingo Saito¹, Haruka Abe², Ren Kamijo², Takayuki Chiba², Takao Oto¹ (1.Yamagata Univ., 2.Yamagata Univ. ROEL)

Keywords:

perovskite nanocrystal,nitride semiconductor,LED

Color-conversion device that combines blue-emitting InGaN LEDs and green/red perovskite nanocrystals (PNCs) only injects current into the chemically stable nitride semiconductor. Therefore, the degradation of the PNCs can be suppressed, leading to high-stability and high-brightness luminescence. In this study, we demonstrated a green-conversion LED with an external quantum efficiency of ~20% by combining polymer-binder-dispersed CsPbBr₃ NCs on a blue-emitting InGaN LED. We succeeded in achieving a device half-lifetime of over 480 h. In addition, we achieved a luminance (2.5 × 10⁵ cd/m²) that exceeded high dynamic range (HDR) at rated current.