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|Type of Document
||Study of Sol gel-deposited ZnO Light Extraction Thin Films to Enhance the Efficiency in Organic Light-Emitting Diodes|
|Date of Defense
||Organic Light-Emitting Diodes
ZnO thin films
Internal light extraction
||In this study, we fabricated organic light-emitting diodes (OLEDs) with internal light extraction structure to reduce the Waveguide mode loss and increase the EQE by using the Sol–gel-deposited ZnO light extraction thin films. And successfully fabricated the organic light-emitting diodes on flexible plastic substrate.|
First, we prepare different ratio of the zinc oxide (ZnO) sol-gel to form various thickness of ZnO thin films by using different spin rate. We investigated surface morphology and optical characteristics of the ZnO thin films, and then, design and fabrication of ITO anodes were performed.
The optimized standard blue OLED device structures were chosen to fabricate blue OLEDs with internal light extraction structure. The opto-electrical properties of the devices were measured and studied.
Finally, we successfully fabricated blue OLEDs with the Sol–gel-deposited ZnO light extraction thin films. Significantly, the blue OLEDs with internal light extraction structure have great light extraction efficiency which increase the external quantum efficiency (EQE) by 20% compared to standard OLEDs at 1000cd/m2. We can inprove the reality and stability of OLED with ZnO light extraction thin films by increasing the baking temperature. And successfully fabricated the organic light-emitting diodes on flexible plastic substrate.
||Ko-Shan Ho - chair|
Shun-Wei Liu - co-chair
Chih-Chien Lee - co-chair
Wen -Yao Huang - co-chair
Mei-Ying Chang - advisor
Indicate in-campus at 99 year and off-campus access at 99 year.|
|Date of Submission