The Ce (x nm)/Au (15 nm) stacked layers were used as semitransparent cathodes in the top-emission organic light emitting devices (TOLEDs) fabricated on a p-type silicon anodes and substrate, where x varies from 4 to 16. The consequence of the Ce layer thickness on transmittance and the device performance were studied when the organic layers NPB (60 nm)/ALQ (60 nm) were kept unchanged, where NPB was N, N,n'-bis-(l-naphthl)-diphenyl-l, 1 '-biphenyl-4, 4'-diamine, and AlQ is tris-(8-hydroxyquinoline) aluminum. The cathode of Ce (11 nm)/Au (15 nm) has a transparency of 46%, and the TOLED with it achieves the highest luminescence efficiencies: a current efficiency of 0.91 cd/A at 13.7 V and a peak power efficiency of 0.28 lm/W at 9 V. The tum-on voltage is 3.0 V. The Ce/Au cathode is both chemically and electrically stable.
参考文献
| [1] | Heinrich L.M.H.;Muller J. .CMOS-compatible organic light-emitting diodes[J].IEEE Transactions on Electron Devices,1997(8):1249-1252. |
| [2] | Huang CJ;Han S;Grozea D;Turak A;Lu ZH .Organic light-emitting devices with silicon anodes[J].Journal of Applied Physics,2005(8):6107-1-6107-3-0. |
| [3] | Chan MY.;Lai SL.;Wong FL.;Lengyel O.;Lee CS.;Lee ST. .Efficiency enhancement and retarded dark-spots growth of organic light-emitting devices by high-temperature processing[J].Chemical Physics Letters,2003(5-6):700-706. |
| [4] | Hsu SF;Lee CC;Hwang SW;Chen CH .Highly efficient top-emitting white organic electroluminescent devices[J].Applied physics letters,2005(25):3508-1-3508-3-0. |
| [5] | Kanno H;Sun Y;Forrest SR .High-efficiency top-emissive white-light-emitting organic electrophosphorescent devices[J].Applied physics letters,2005(26):3502-1-3502-3-0. |
| [6] | Chen, CW;Lin, CL;Wu, CC .An effective cathode structure for inverted top-emitting organic light-emitting devices[J].Applied Physics Letters,2004(13):2469-2471. |
| [7] | Barnes W.L. .Electromagnetic crystals for surface plasmon polaritons and the extraction of light from emissive devices[J].Journal of Lightwave Technology: A Joint IEEE/OSA Publication,1999(11):2170-2182. |
| [8] | L. H. Smith;J. A. E. Wasey;W. L. Barnes .Light outcoupling efficiency of top-emitting organic light-emitting diodes[J].Applied physics letters,2004(16):2986-2988. |
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