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Highly efficient deep blue light emitting devices based on triphenylsilane modified phenanthro[9, 10‐ d ]imidazole
Author(s) -
Gao Zhao,
Cheng Gang,
Shen Fangzhong,
Zhang Shitong,
Zhang Yunan,
Lu Ping,
Ma Yuguang
Publication year - 2014
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201300141
Subject(s) - imidazole , quantum yield , blue light , quantum efficiency , thermal stability , fluorescence , optoelectronics , materials science , deep blue , yield (engineering) , doping , solubility , optics , photochemistry , chemistry , physics , stereochemistry , organic chemistry , metallurgy
Abstract Highly efficient deep blue fluorescent material (SiPIM) based on phenanthro[9, 10‐ d ]imidazole (PPI) and triphenylsilane is designed and synthesized. SiPIM presents a narrow deep blue emission, high quantum yield, high thermal stability and good morphological stability. A non‐doped vacuum‐deposited device using SiPIM as active layer achieves an extremely high external quantum efficiency of 6.29% with true deep blue CIE coordinates of (0.163, 0.040). The solution‐processed device is also tried due to the good solubility of SiPIM, which displays a maximum η ext of 2.40% and CIE coordinates of (0.157, 0.041).