1. Narrowband emission from carbonyl-bridged triarylamine derivatives with suppressed high-frequency vibronic coupling.
- Author
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Ye, Xiyun, Xu, Lei, Xiao, Jiyin, Pan, Yuyu, Zhou, Jiadong, Wang, Bohan, Tian, Guangjun, Jin, Yaocheng, Ma, Zetong, Huo, Yanping, and Hu, Dehua
- Subjects
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VIBRONIC coupling , *LIGHT emitting diodes , *LUMINOPHORES , *EXCITED states , *ORGANIC light emitting diodes , *TOLUENE , *AROMATIC amines - Abstract
Organic luminophores of narrowband emission are considered a filter-less light resource, promising for high-resolution organic light-emitting diode (OLED) display technology. It is essentially feasible to achieve narrowband emission by manipulating the intrinsic structural relaxation and vibronic coupling in the excited state. On this basis, by the introduction of single bond-linked peripheral moieties of 4-methoxyphenyl into the benzo[c]benzo [7,8]quinolino[1,2,3-fg]acridine-7,11-dione (BAO) core, the resulting BAO-PMO is observed to exhibit better performance, achieving a full width at half-maximum (FWHM) of down to 27 nm/0.14 eV in toluene for the narrowest band compared with that of BAO (35 nm/0.20 eV). An effective strategy is thus proposed by the significant enhancement of the low-frequency vibronic coupling strength with simultaneous mitigation of the high-frequency ones to realize the control of structural relaxation. In consequence, the BAO-PMO based OLED device exhibits a narrowband green emission with an FWHM of 37 nm/0.18 eV. • Organic narrowband luminophores based on carbonyl-bridged triarylamine were shown. • The emission narrowing was achieved via vibronic coupling regulation of the excited-state configuration. • Doped OLEDs exhibit narrowband green emission with a full width at half-maximum of down to 37 nm. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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