What question did this study set out to answer?

This research aims to explore how donor position variations in specific emitters affect their excited state properties and OLED efficiency.

March 18, 2026Open Access

Donor position driven excited state modulation in benzoylthiophene–carbazole emitters: divergent TTA/RTP pathways for high efficiency blue-cyan OLEDs

Key Points

This research aims to explore how donor position variations in specific emitters affect their excited state properties and OLED efficiency.
Examined molecular conformations of benzoylthiophene–carbazole emitters
Investigated excited state phenomena including AIE, TSCT, RTP, and TTA
Measured external quantum efficiency (EQE) of the 2,4-isomer
Achieved maximum EQE of 17% for the 2,4-isomer emitter
Demonstrated the role of donor position in enhancing OLED efficiency
Highlighted the divergent pathways of TTA and RTP in the emitting process.

Abstract

Donor positional isomerism in benzoylthiophene–carbazole emitters enables precise control over molecular conformation and activates AIE, TSCT, RTP, and TTA leading to efficient OLED with the maximum EQE of 17% for the 2,4-isomer.

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Donor position driven excited state modulation in benzoylthiophene–carbazole emitters: divergent TTA/RTP pathways for high efficiency blue-cyan OLEDs

Key Points

Abstract

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