[18a-M_101-1~9] 12.8 Specific theme: Photoelectric Properties, Device Fabrication and Structural Controls of Organic-Inorganic Hybrid Perovskites

12:00 PM - 12:15 PM JST(3:00 AM - 3:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[18a-M_101-8] High-Performance Pure-Blue Perovskite Quantum Dot LEDs via Organic Host Dispersion

〇Koryu Sato¹, Yuna Igarashi², Takayuki Chiba^1,2 (1.Yamagata Univ., 2.Grad. Schl. of Org. Mater. Sci.)

Keywords:

perovskite,Blue emission,Nano materials

Red and green PeQD-LEDs have achieved maximum external quantum efficiencies (EQEs) exceeding 25%, comparable to those of cadmium-based QD-LEDs. However, pure blue PeQD-LEDs still suffer from low efficiency due to large hole injection barriers caused by deep valence band levels. In this study, hole injection was improved by forming a composite film of small-sized CsPbBr₃ quantum dots and an organic small-molecule host. As a result, a pure blue PeQD-LED with an EQE of 2.11% and a luminance of 37.0 cd/m² was successfully realized.