Efficient single-molecular white-light emission for iridium-based photoluminescent and electroluminescent white OLEDs

Journal article

The white organic light-emitting diode has become as a new class of emerging solid-state lighting sources due to its advantage of warm, pure white light emission, flexible lighting, and environmentally friendly indoor lighting. Here, we report three rationally designed cyclometalated [3 + 2+1] iridium(Ⅲ) complexes that emit white emission simultaneously from phosphorescent blue and yellow in the solid-state thin film. The blue GaN-based solid-state white light-emitting diodes with iridium(Ⅲ) complexes as a color converter show a color rendering index of 84.4 and International Commission on Illumination (CIE) coordinates of (0.30, 0.33). In addition, the vacuum-deposited organic light-emitting diode device exhibits a low turn-on voltage of 3.0 V and a maximum luminance (L_max) of 335 cd m⁻² with CIE coordinate of (0.31, 0.33), reaching standard naturally warm white light.

Authors: Zhang, M; Li, W; Zhang, S-W; Ng, M; Wu, C

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Cell Press
• Journal: Cell Reports Physical Science
• Volume: 4
• Issue: 12
• Article number: 101684
• Publication date: 2023-11-17
• Acceptance date: 2023-10-25
• DOI: 10.1016/j.xcrp.2023.101684
• EISSN: 2666-3864
• Language: English
• Keywords: white OLED; FFR; single-molecular white light; white-light emission; iridium complex