TITLE:
Synthesis of New Binder Polymers for Photolithographic Patterning of Black Pixel Define Layers of Organic Light Emitting Diode
AUTHORS:
Genggongwo Shi, Kyeongha Baek, Seon Hong Ahn, Jun Bae, Jeseob Kim, Lee Soon Park
KEYWORDS:
Organic Light Emitting Diode, Pixel Define Layer, Photolithography, One-Pot Synthesis
JOURNAL NAME:
Materials Sciences and Applications,
Vol.10 No.11,
November
11,
2019
ABSTRACT: The fabrication of black pixel define layer (PDL) on the organic light emitting diode (OLED) panel has been developed actively by using negative-tone black photoresist which contain photoinitiator, photosensitizer, binder polymer, multifunctional monomer and black mill base in order to improve the outdoor visibility of OLEDs. Cardo type binder polymer containing bulky and rigid fluorene group has been widely used in the black photoresist formulation. However, the commercial cardo binder polymer has high cost and requires high UV dose for the fine patterning of PDL in the photolithographic process. In this study we designed and synthesized various non-cardo type binder polymers and evaluated the new binder polymers in comparison with the cardo binder polymer for the improved patterning of PDL on the OLED panel.