Red Room Temperature Phosphorescence in Non-Aromatic Carbonized Polymer Dots

Area of Science:

• Organic electronics
• Materials science
• Photophysics

Background:

• Achieving red organic room temperature phosphorescence (RTP) is challenging, particularly in non-aromatic systems.
• Existing RTP materials often rely on aromatic structures, limiting design flexibility.

Purpose of the Study:

• To develop novel non-aromatic red organic RTP materials.
• To explore carbonized polymer dots (CPDs) as a platform for long-wavelength RTP.

Main Methods:

• Synthesized non-aromatic CPDs using polyacrylic acid (PAA), succinic acid (SA), and phosphoric acid via microwave irradiation.
• Induced and confined carboxyl dimer association (CDA) within the CPDs.
• Characterized the photophysical properties of the resulting red RTP materials.

Main Results:

• Achieved red RTP emission at 605 and 645 nm.
• Observed long afterglow lasting for 1 second with lifetimes of 61 ms and 45 ms.
• Demonstrated the stabilization of CDA by the intrinsic carbonized structure of CPDs.

Conclusions:

• Successfully reported the first non-aromatic red organic RTP materials.
• Established CPDs as an effective platform for achieving non-aromatic long-wavelength RTP.
• Highlighted the role of CDA in enabling red RTP in non-aromatic systems.