Phosphorescent white organic light-emitting diodes with stable white color depending on luminance.Phosphorescent white organic light-emitting diodes with stable white color depending on luminance
- Other Titles
- Phosphorescent white organic light-emitting diodes with stable white color depending on luminance
- Authors
- Lee, Hyunkoo
- Issue Date
- Jan-2021
- Publisher
- ELSEVIER
- Keywords
- White OLED; Organic light-emitting diode; Color stability; Phosphorescence; Transient EL; Transient PL
- Citation
- CURRENT APPLIED PHYSICS, v.21, pp 116 - 120
- Pages
- 5
- Journal Title
- CURRENT APPLIED PHYSICS
- Volume
- 21
- Start Page
- 116
- End Page
- 120
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/146852
- DOI
- 10.1016/j.cap.2020.10.016
- ISSN
- 1567-1739
1878-1675
- Abstract
- We fabricated simple and color-stable phosphorescent white organic light-emitting diodes (OLEDs) without an interlayer using a single host of 1,3-bis(9-carbazolyl)benzene with iridium(III) bis[(4,6-difluorophenyl) pyridinato-N,C2']picolinate and bis(1-phenylisoquinoline)(acetylacetonate) iridium(III) as blue and red phosphorescent emitters, respectively. The CIE 1931 color coordinate difference of the white OLEDs is (0.008, 0.007) when the luminance of the device is increased from approximately 265 cd/m(2) to 9156 cd/m(2), which is regarded as visually indistinguishable in practice. In addition, we also measured the decay time of excitons to investigate the emission mechanism in this device using transient photoluminescence and electroluminescence techniques.
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