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Updated: Jun 10, 2026

Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes
Published on: November 15, 2016
Highly efficient white polymer light-emitting devices based on wide bandgap polymer doped with blue and yellow
Gang Cheng1, Teng Fei, Yu Duan
1State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China. chenggang@jlu.edu.cn
Abstract:
We realize high luminous efficiency (LE) in white polymer light-emitting devices by employing a wide bandgap polymer P36HCTPSi as host and introducing a blue-yellow two-color system for obtaining white emission. Phosphorescent dopants bis[(4,6-difluorophenyl)pyridinato-N,C(2)]-(picolinato)iridium(III) (FIrpic) and iridium(III) bis(2-(9,9'-spirobi[fluorene]-7-yl)pyridine-N,C(2')) acetylacetonate [Ir(SBFP)(2) (acac)] were used as blue and yellow emitters, respectively. Electroluminescent spectra and LE were both affected by Ir(SBFP)(2)(acac) concentration; the device with low concentration (0.4 wt.%) showed white emission with a LE of 24.1 cd/A at 1000 cd/m(2), while the one with high concentration (4 wt.%) emitted yellowish-white light with a higher LE of 47.3 cd/A at 1000 cd/m(2).
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