Enhanced proportion of radiative excitons in non-doped electro-fluorescence generated from an imidazole derivative with an orthogonal donor–acceptor structure

• DOI: 10.1039/c3cc47130f
• Publication Date: 2013-10-11T16:05:06Z
• Authors: Shitong Zhang; Weijun Li; Liang Yao; Yuyu Pan; Fangzhong Shen; Ran Xiao; Bing Yang; Yuguang Ma
• Keywords: 01 natural sciences; 0104 chemical sciences

A greatly enhanced proportion of radiative excitons in non-doped blue electroluminescence with a maximum exciton utilizing efficiency (EUE) of 85% is harvested in the orthogonal cyano substituted, charge transfer (CT) emitter TPMCN, in comparison to the localized emission (LE)-like emitter TPM with a low EUE of 16%.