1. Organic light-emitting diodes with direct contact-printed red, green, blue, and white light-emitting layers.
- Author
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Chen, Sun-Zen, Peng, Shiang-Hau, Ting, Tzu-Yu, Wu, Po-Shien, Lin, Chun-Hao, Chang, Chin-Yeh, Shyue, Jing-Jong, and Jou, Jwo-Huei
- Subjects
ORGANIC light emitting diodes ,CONTACT printing (Photographic process) ,LUMINANCE (Photometry) ,ELECTROLUMINESCENCE ,PHOTOGRAPHIC film - Abstract
We demonstrate the feasibility of using direct contact-printing in the fabrication of monochromatic and polychromatic organic light-emitting diodes (OLEDs). Bright devices with red, green, blue, and white contact-printed light-emitting layers with a respective maximum luminance of 29 000, 29 000, 4000, and 18 000 cd/m2 were obtained with sound film integrity by blending a polymeric host into a molecular host. For the red OLED as example, the maximum luminance was decreased from 29 000 to 5000 cd/m2 as only the polymeric host was used, or decreased to 7000 cd/m2 as only the molecular host was used. The markedly improved device performance achieved in the devices with blended hosts may be attributed to the employed polymeric host that contributed a good film-forming character, and the molecular host that contributed a good electroluminescence character. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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