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From A Fluorescent Chromophore in Solution to An Efficient Emitter in the Solid State
Author(s) -
Liu Yang,
Lv Yun,
Zhang Xiying,
Chen Shuming,
Lam Jacky W. Y.,
Lu Ping,
Kwok Ryan T. K.,
Kwok Hoi Sing,
Tao Xutang,
Tang Ben Zhong
Publication year - 2012
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201200489
Subject(s) - chromophore , fluorescence , common emitter , fluoranthene , photochemistry , solid state , luminescence , oled , molecule , quantum efficiency , planar , chemistry , materials science , optoelectronics , nanotechnology , optics , organic chemistry , physics , anthracene , computer science , computer graphics (images) , layer (electronics)
Polycyclic aromatic hydrocarbons (PAHs) normally exhibit efficient fluorescence in dilute solutions, whereas their emission is significantly quenched in the aggregated state due to the formation of π‐aggregates/excimers. The rigid and planar structure of PAHs plays a positive role in terms of fluorescence in solution but a negative one in the aggregated state. To bestow PAHs a luminescent ability in the solid state, we constructed a non‐coplanar PAH‐substituted ethene. By using the planar PAH fluoranthene as a building block, a highly efficient solid‐state emitter with a fluorescence quantum efficiency of unity in the aggregated state was obtained. OLEDs with contain the molecule as an emitter reach a luminance up to 20 520 cd m −2 and an efficiency of 10 cd A −1 .
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