Premium
Highly efficient white organic light‐emitting diodes with over 100 lm/W for next‐generation solid‐state lighting
Author(s) -
Yamae Kazuyuki,
Tsuji Hiroya,
Kittichungchit Varutt,
Ide Nobuhiro,
Komoda Takuya
Publication year - 2013
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1002/jsid.203
Subject(s) - phosphorescence , materials science , optoelectronics , color rendering index , diode , color temperature , luminous efficacy , high color , oled , optics , white light , quantum efficiency , solid state , solid state lighting , flat panel , light emitting diode , computer science , physics , fluorescence , engineering physics , nanotechnology , layer (electronics) , artificial intelligence , color image , image processing , image (mathematics)
High‐performance two‐unit all‐phosphorescent white devices on a built‐up light extraction substrate that comprised high‐index materials were studied. As a result of suitable optical and electrical design, the device showed an extremely high efficacy of 114 lm/W at 1000 cd/m 2 . The device also showed 102 lm/W with long lifetime (LT70) of over 10,000 h at 3000 cd/m 2 . Outstanding external quantum efficiency of almost 50% was also achieved in a flat panel with an emissive area of 25 cm 2 . Color coordinates of the panel met the Energy Star ® criteria of solid‐state lighting with CIE (Commission Internationale de l'Éclairage) 1931 ( x , y ) = (0.477, 0.423), and the color rendering index was 81.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom