title: From a fluorescent chromophore in solution to an efficient emitter in the solid state.
abstract: 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).
authors: State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P. R. China.
authors: Yang
authors: Y
authors: Liu
authors: Yun
authors: Y
authors: Lv
authors: Xiying
authors: X
authors: Zhang
authors: Shuming
authors: S
authors: Chen
authors: Jacky W Y
authors: JW
authors: Lam
authors: Ping
authors: P
authors: Lu
authors: Ryan T K
authors: RT
authors: Kwok
authors: Hoi Sing
authors: HS
authors: Kwok
authors: Xutang
authors: X
authors: Tao
authors: Ben Zhong
authors: BZ
authors: Tang