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White Light Emission From DBPPV and CdSe/ZnS Quantum Dots Dually Hybridized on InGaN Light-Emitting Diodes

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4 Author(s)
Su, Yan-Kuin ; Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan ; Ping-Chieh Tsai ; Huang, Chun-Yuan ; Chen, Ying-Chih

We have demonstrated the white light emission from the novel hybrid light-emitting diodes. With a polymer/QD composite film thickness of 0.61 , the Commission Internationale de l'Eclairage chromaticity coordinates of the emitting light from the device attain (0.33, 0.36). The coordinates are shifted to (0.43, 0.46) as the thickness is further increased. Meanwhile, the luminescence spectrum shows that more than 90% of the blue light is effectively energy transferred to green and red lights. For a long-term operation, the luminescence intensity from the polymer is decreased by 62% within 5 h due to the photooxidation effect.

Published in:

Electron Device Letters, IEEE  (Volume:29 ,  Issue: 6 )

Date of Publication:

June 2008

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