کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
177074 | 458963 | 2011 | 5 صفحه PDF | دانلود رایگان |
Branched diphenylsilane derivatives with pendent indolyl fragments were synthesized and characterized. The compounds show high thermal stability with thermal decomposition starting at temperatures above 367 °C and ability to form glasses with glass-transition temperatures of 53–58 °C. The electron photoemission spectra of the layers of the synthesized compounds showed ionization potentials of ca. 5.85 eV. The derivatives were tested as host materials in phosphorescent OLEDs with iridium(III)[bis(4,6-difluorophenyl)-pyridinato-N,C2′]picolinate as the guest. The device with the host derivative containing four electronically isolated indolyl fragments exhibited the best overall performance with maximum current efficiency of about 12 cd/A.
► New electro-active materials were synthesized and characterized.
► Thin amorphous films of the derivatives were tested as hosts in blue OLEDs.
► The best device demonstrated current efficiency of about 12 cd/A.
Journal: Dyes and Pigments - Volume 91, Issue 2, November 2011, Pages 177–181