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- Title
Optimal Color Stability for White Organic Light-Emitting Diode (WOLED) by Using Multiple-Ultra-Thin Layers (MUTL).
- Authors
Kan-Lin Chen; Chien-Jung Huang; Wen-Ray Chen; Fong-Yi Lin; Teen-Hang Meen; Chih-Chieh Kang
- Abstract
The work demonstrates the improvement of color stability for white organic light-emitting diode (WOLED). The devices were prepared by vacuum deposition on ITO-glass substrates. These guest materials of 5,6,11,12-tetraphenylnaphthacene (Rubrene) were deposited in 4,4'-bis(2,2-diphenyl vinyl)-1,1'-biphenyl (DPVBi), resulting in an emitting layer. Experimental results reveal that the properties in themultiple-ultra-thin layer (MUTL) are better than those of the emitting layer with a single guest material, reaching the commercial white-light wavelength requirement of 400-700 nm. The function of the MUTL is as the light-emitting and trapping layer. The results show that the MUTL has excellent carrier capture effect, leading to high color stability of the device at various applied voltages. The Commissions Internationale De L'Eclairage (CIE) coordinate of this device at 3~7V is few displacement and shows a very slight variation of (0.016, 0.009). The CIE coordinates at a maximal luminance of 9980 cd/m2 are (0.34, 0.33).
- Subjects
ORGANIC light emitting diodes; COMPOSITE membranes (Chemistry); DIPHENYL; WAVELENGTHS; SUBSTRATES (Materials science); ELECTRIC potential
- Publication
International Journal of Photoenergy, 2013, p1
- ISSN
1110-662X
- Publication type
Article
- DOI
10.1155/2013/173289