Efficient deep-red light-emitting electrochemical cells based on a perylenediimide-iridium-complex dyad

Area of Science:

• Materials Science
• Organic Electronics
• Photochemistry

Background:

• Light-emitting electrochemical cells (LECs) are promising for low-cost lighting and displays.
• Achieving efficient deep-red emission in LECs remains a challenge.
• Perylene diimides and iridium complexes are known for their photophysical properties.

Purpose of the Study:

• To develop a novel two-layer light-emitting electrochemical cell (LEC) device.
• To utilize a new perylenediimide-iridium-complex dyad for deep-red emission.
• To achieve high external quantum efficiencies (EQEs) in the deep-red region.

Main Methods:

• Synthesis of a new perylenediimide-iridium-complex dyad.
• Fabrication of a two-layer light-emitting electrochemical cell device.
• Characterization of the device's electroluminescence and quantum efficiency.

Main Results:

• The developed device successfully emits in the deep-red region.
• High external quantum efficiencies (EQEs) of 3.27% were achieved.
• The perylenediimide-iridium-complex dyad demonstrated efficient charge transport and light emission.

Conclusions:

• A novel perylenediimide-iridium-complex dyad enables efficient deep-red emission in two-layer LECs.
• The device architecture and material design contribute to high EQEs.
• This work presents a promising approach for developing advanced deep-red emitting devices.