Multicolor heterostructure organic LEDs based on selectively doped hole-transport polymer layers

Chung-chih Wu; Hsin-hua Chang; Chih Chung Yang; Chieh-wei Chen; Cheng-chung Lee

doi:10.1117/12.416918

2 February 2001 Multicolor heterostructure organic LEDs based on selectively doped hole-transport polymer layers

Chung-chih Wu, Hsin-hua Chang, Chih Chung Yang, Chieh-wei Chen, Cheng-chung Lee

Proceedings Volume 4105, Organic Light-Emitting Materials and Devices IV; (2001) https://doi.org/10.1117/12.416918
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

In this paper, we report an effective thermal transfer process for performing controllable and selective doping of polymer films for multicolor organic light-emitting devices (OLEDs) or color pixels in OLED displays. In this process, the polymer receiver film is placed in direct contact with the dye-dispersed polymer donor film (with patterns) to permit direct dye-diffusion thermal transfer. It permits controllable lateral and vertical modulations of the dopant distributions of a polymer film for organic devices. Furthermore, it is the intention to combine the selectively doped (patterned) polymer layers with the vacuum deposited small-molecule films, such that both the heterostructure versatility of small-molecule materials and the patterning advantage of polymeric materials could be conserved in the hybrid polymer/small molecule heterostructure OLEDs. The rather thermally stable polymer poly(N-vinylcarbazole) (PVK), which is hole-transport and deep-blue emitting, in combination with several electron-transport molecules has been studied to demonstrate the feasibility of these concepts.

Citation Download Citation

Chung-chih Wu, Hsin-hua Chang, Chih Chung Yang, Chieh-wei Chen, and Cheng-chung Lee "Multicolor heterostructure organic LEDs based on selectively doped hole-transport polymer layers", Proc. SPIE 4105, Organic Light-Emitting Materials and Devices IV, (2 February 2001); https://doi.org/10.1117/12.416918

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