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66.4: Invited Paper : High‐Quality White OLEDs and Resource Saving Fabrication Processes for Lighting Application
Author(s) -
Komoda Takuya,
Tsuji Hiroya,
Ito Norihiro,
Nishimori Taisuke,
Ide Nobuhiro
Publication year - 2010
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.3500653
Subject(s) - chromaticity , oled , deposition (geology) , materials science , optoelectronics , fabrication , phosphorescence , controllability , phosphor , fluorescence , optics , nanotechnology , physics , layer (electronics) , mathematics , medicine , paleontology , alternative medicine , pathology , sediment , biology
White OLEDs with high efficiency (over 30 lm/W) and high quality emission characteristics (e.g., CRI of over 90, very small variation of chromaticity in different directions and chromaticity just on the black‐body radiation curve) applicable to “Lighting” were realized by a two‐unit structure with a fluorescent deep blue emissive unit and a phosphorescent green and red emissive unit. A new deposition source with a hot‐wall and a rate controllable valve was developed. Thickness uniformity within +/− 3% at high deposition rate of over 8 nm/s, high material utilization of over 70 %, and repeatable deposition rate controllability were confirmed.