Non-doped active layer, benzo[k]fluoranthene-based linear acenes, for deep blue- to green-emissive organic light-emitting diodes
作者:Yu-Hao Lee、Tsun-Cheng Wu、Chao-Wu Liaw、Ten-Chin Wen、Shih-Wei Feng、Jey-Jau Lee、Yao-Ting Wu、Tzung-Fang Guo
DOI:10.1016/j.orgel.2013.01.021
日期:2013.4
This work studies a series of fluorescent materials, benzo[k]fluoranthene-based linear acenes, and uses these materials directly as the non-doped active layer to fabricate deep blue- to green-emissive organic light emitting diodes (OLEDs). Experimental results indicate that benzo[k]fluoranthene-based linear acenes with different substituents in pristine films have a wide range and strong intensity of the luminescence spectra. The substituents of benzo[k]fluoranthene derivatives modulate the lifetime of the excited state and PL spectra of excitonic, excimer or both emissions in the solid state. Controls of emission spectra are exploited in fabricating high-performance non-doped deep blue to green OLEDs with electroluminescence in the deep blue region (420-460 nm), green region (480-580 nm) or both (430-580 nm). (c) 2013 Elsevier B.V. All rights reserved.