Crosslinking using rapid thermal processing for the fabrication of efficient solution-processed phosphorescent...

Area of Science:

• Materials Science
• Organic Electronics
• Polymer Chemistry

Background:

• Hole-transport layers (HTLs) are crucial for efficient organic electronic devices.
• Developing rapid and effective crosslinking methods for HTLs is essential for manufacturing.

Purpose of the Study:

• To synthesize and investigate copolymers containing triscarbazole for hole transport.
• To evaluate the efficacy of oxetane or benzocyclobutene groups for rapid thermal crosslinking.
• To assess the performance of devices utilizing these crosslinked HTLs.

Main Methods:

• Synthesis of copolymers featuring triscarbazole and crosslinkable groups (oxetane/benzocyclobutene).
• Rapid thermal processing (RTP) for crosslinking the hole-transport layers.
• Fabrication and characterization of organic electronic devices with spin-coated emissive layers.

Main Results:

• Copolymers were successfully synthesized with efficient hole-transporting triscarbazole units.
• Rapid thermal processing (RTP) enabled crosslinking in 30 minutes or less.
• Devices with RTP-crosslinked HTLs achieved high external quantum efficiencies (EQEs) up to 15%.

Conclusions:

• Copolymers with triscarbazole and crosslinkable groups offer a viable route for rapid HTL fabrication.
• RTP is a highly effective method for crosslinking these materials, improving device performance.
• The developed materials and processing techniques show promise for efficient organic electronic devices.