S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Chemical and Biological Engineering (화학생물공학부) Journal Papers (저널논문_화학생물공학부)
Relationship between dopant energy levels and device performances of triplet mixed host devices
- Kim, Sung Hyun; Jang, Jyongsik; Lee, Jun Yeob
- Issue Date
- Journal of Luminescence 128 (2008) 2035–2037
- Device performances of phosphorescent organic light-emitting diodes (PHOLEDs) with triplet mixed
host structure were correlated with dopant energy levels and mixed host composition. A mixed host of
4,40,400-tris-(N-carbazolyl)triphenylamine (TCTA) and spirobifluorene type host (PH1) was used and
three different dopants with different bandgap were doped in the mixed host. Optimum quantum
efficiency was obtained in TCTA:PH1 (50:50) mixed host device in the case of green dopants, while the
optimum host composition for red and orange dopants was TCTA:PH1 (25:75).
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