Highly efficient phosphor-converted white organic light-emitting diodes with moderate microcavity and light-recycling filters.
We demonstrate the combined effects of a microcavity structure and light-recycling filters (LRFs) on the forward electrical efficiency of phosphor-converted white organic light-emitting diodes (pc-WOLEDs). The introduction of a single pair of low- and high-index layers (SiO(2)/TiO(2)) improves the blue emission from blue OLED and the insertion of blue-passing and yellow-reflecting LRFs enhances the forward yellow emission from the YAG:Ce(3+) phosphors layers. The enhancement of the luminous efficacy of the forward white emission is 1.92 times that of a conventional pc-WOLED with color coordinates of (0.34, 0.34) and a correlated color temperature of about 4800 K.
Cho
Sang-Hwan
SH
Department of Physics, KAIST, Daejeon, Korea.
Oh
Jeong Rok
JR
Park
Hoo Keun
HK
Kim
Hyoung Kun
HK
Lee
Yong-Hee
YH
Lee
Jae-Gab
JG
Do
Young Rag
YR
D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation*; D008029:Lighting / Q000295:instrumentation*; D008904:Miniaturization; D009930:Organic Chemicals / Q000737:chemistry*; D012666:Semiconductors; D014159:Transducers
D009930:Organic Chemicals