کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1268010 972390 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Realization of highly efficient white polymer light-emitting devices via interfacial energy transfer from poly(N-vinylcarbazole)
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Realization of highly efficient white polymer light-emitting devices via interfacial energy transfer from poly(N-vinylcarbazole)
چکیده انگلیسی

We report highly efficient white polymer light-emitting devices (WPLEDs) using a newly synthesized, deep-blue emitting fluorene-co-dibenzothiophene-S,S-dioxide copolymer as host, doped with two narrow-bandgap iridium complexes. Despite the low-lying triplet energy levels of the host, phosphorescent quenching by the polyfluorene copolymer host was significantly suppressed with poly(N-vinylcarbazole) (PVK) as hole-injecting, anode buffer layer. The energy transfer process had been studied via transient photoluminescence spectra and confirmed that PVK layer is responsible for the efficient electrophosphorescence in the devices. As a result of balanced red–green–blue (RGB) emission from the host and the triplet emitters, white emission with Commission Internationale de L’Eclairage (CIE) coordinates of (0.278, 0.312) was achieved, with a peak luminous efficiency of 15.1 cd A−1 and a color rendering index (CRI) of 79–86.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Organic Electronics - Volume 11, Issue 4, April 2010, Pages 529–534
نویسندگان
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