Near‐Infrared Electroluminescent Conjugated Copolymer: Triphenyalmine‐Functionalized Benzothiadiazole‐Thiophene System for Circularly Polarized OLEDs DOI Creative Commons
Benedetta Maria Squeo, Alessia Arrigoni, Francesco Zinna

et al.

Macromolecular Rapid Communications, Journal Year: 2025, Volume and Issue: unknown

Published: March 5, 2025

We present a conjugated copolymer designed as near-infrared (NIR) emitter for organic light-emitting diodes (NIR-OLEDs). The low bandgap donor-acceptor copolymer, comprising terthiophene derivative (3T) and benzothiadiazole (BT), is end-capped with bulky triphenyalmine (TPA) groups (3TBT-TPA). Compared the parent homologue capped simple phenyl rings, 3TBT-TPA shows enhanced solubility in solvents improved photoluminescence quantum yield thanks to reduced close packing of chains. 3TBT-TPA, used both neat emitting layer blended fluorene-benzothiadiazole (F8BT) host NIR-OLEDs, external efficiency up 0.58%. Additionally, chiral induction achieved F8BT:3TBT-TPA blend film using commercial dopant, yielding circularly polarized (CP), (PL) electroluminescence (EL) range 500-800 nm maximum dissymmetry factor 10-2. This first example CP-NIR EL from polymer. work highlights potential TPA-capped strategy copolymers efficient NIR-OLEDs opens new perspectives use polymers NIR photonic applications.

Language: Английский

Near‐Infrared Electroluminescent Conjugated Copolymer: Triphenyalmine‐Functionalized Benzothiadiazole‐Thiophene System for Circularly Polarized OLEDs DOI Creative Commons
Benedetta Maria Squeo, Alessia Arrigoni, Francesco Zinna

et al.

Macromolecular Rapid Communications, Journal Year: 2025, Volume and Issue: unknown

Published: March 5, 2025

We present a conjugated copolymer designed as near-infrared (NIR) emitter for organic light-emitting diodes (NIR-OLEDs). The low bandgap donor-acceptor copolymer, comprising terthiophene derivative (3T) and benzothiadiazole (BT), is end-capped with bulky triphenyalmine (TPA) groups (3TBT-TPA). Compared the parent homologue capped simple phenyl rings, 3TBT-TPA shows enhanced solubility in solvents improved photoluminescence quantum yield thanks to reduced close packing of chains. 3TBT-TPA, used both neat emitting layer blended fluorene-benzothiadiazole (F8BT) host NIR-OLEDs, external efficiency up 0.58%. Additionally, chiral induction achieved F8BT:3TBT-TPA blend film using commercial dopant, yielding circularly polarized (CP), (PL) electroluminescence (EL) range 500-800 nm maximum dissymmetry factor 10-2. This first example CP-NIR EL from polymer. work highlights potential TPA-capped strategy copolymers efficient NIR-OLEDs opens new perspectives use polymers NIR photonic applications.

Language: Английский

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