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Conference Paper
White Powder Electroluminescent Device with ZnS:Cu, Cl and Tb3Al5O12:Ce3+ Phosphors Using Layered Structure
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- Authors
- Bong Je Park, Ho Seong Jang, Hong Seok Seo, Jun Tae Ahn, Woon Jin Chung, Duk Young Jeon
- Issue Date
- 2007-12
- Citation
- International Display Workshops (IDW) 2007, pp.917-920
- Language
- English
- Type
- Conference Paper
- Abstract
- White light was generated by alternate current powder electroluminescent (ACPEL) device using ZnS:Cu,Cl and TAG:Ce phosphors. TAG:Ce absorbing blue EL emission of ZnS:Cu,Cl layer was screen-printed on top of ITO glass to emit yellow photoluminescence (PL). White ACPEL device showed better luminance than blue ACPEL device did. Luminance increased with the thickness of TAG:Ce layer. The emission peaks of blue and yellow light were blue-shifted. The blueshift of ZnS:Cu,Cl can be attributed to the decrease of 450 nm blue light by the absorption of TAG:Ce, while the blue-shift of TAG:Ce is due to the addition of ZnS:Cu,Cl emission to TAG:Ce emission in tail region of ZnS:Cu,Cl emission.
- KSP Keywords
- Blue light, Blue-shifted, Ce emission, Electroluminescent devices, ITO glass, Layered structure, White powder, Yellow light, screen-printed, white light, yellow photoluminescence