Arylfluorenyl-substituted metoxytriphenylamines as deep blue exciplex forming bipolar semiconductors for white and blue organic light emitting diodes
作者:Monika Cekaviciute、Jurate Simokaitiene、Dmytro Volyniuk、Gjergji Sini、Juozas V. Grazulevicius
DOI:10.1016/j.dyepig.2017.01.023
日期:2017.5
properties of the compounds. Deep blue exciplexes formed by the newly synthesized arylfluorenyl-substituted triphenylamines and the known electron-transporting materials 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) or 4,7-diphenyl-1,10-phenanthroline (Bphen) were discovered and studied. Based on these exciplexes, we propose an original structure of cold white OLED with CIE chromaticity coordinates ranging
芳基芴基取代的三苯胺是通过酸促进的Friedel-Crafts型取代反应制备的。发现合成的化合物能够在高于152℃的玻璃化转变温度下形成玻璃。发现衍生物层的电离势在5.25–5.41 eV的范围内。三[3-甲氧基-4-(9-苯基-9-芴基)苯基]胺层的飞行时间空穴和电子漂移迁移率值均超过10 -3 cm 2/ V在室温下的高电场下。通过密度泛函理论计算获得的结果用于讨论化合物的电荷传输和光学性质。由新合成的芳基芴基取代的三苯胺和已知的电子传输材料2,9-二甲基-4,7-二苯基-1,10-菲咯啉(BCP)或4,7-二苯基-1,10-形成的深蓝色复合物发现并研究了菲咯啉(Bphen)。基于这些激基复合物,我们提出了一种冷白OLED的原始结构,其CIE色度坐标取决于所施加的电压,其范围为(0.286,0.378)至(0.24,0.29)。冷白色OLED的电致发光光谱由深蓝色和绿色发射组成,这些