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1. (WO2017020361) ORGANIC ELECTROLUMINESCENT DEVICE STRUCTURE AND FABRICATION METHOD THEREOF

Pub. No.:    WO/2017/020361    International Application No.:    PCT/CN2015/087911
Publication Date: Fri Feb 10 00:59:59 CET 2017 International Filing Date: Tue Aug 25 01:59:59 CEST 2015
IPC: H01L 51/52
Applicants: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
深圳市华星光电技术有限公司
Inventors: HUANG, Hui
黄辉
Title: ORGANIC ELECTROLUMINESCENT DEVICE STRUCTURE AND FABRICATION METHOD THEREOF
Abstract:
Provided are an organic electroluminescent device structure and fabrication method thereof. Surfaces of an anode (20), an organic electroluminescent structure (30) and a cathode (40) of the organic electroluminescent device structure are respectively provided with a wavy structure having periodic undulations, thereby avoiding occurrence of total internal reflection in a process of an emergent light propagating to a substrate, and providing an enhanced light extraction efficiency. A PEDOT:PSS film is used as an anode material replacing an ITO material, thereby reducing costs. The fabrication method of the organic electroluminescent device adopts a wet coating process to form a PEDOT:PSS film serving as an anode of the organic electroluminescent device, thereby reducing production costs. In addition, the PEDOT:PSS film is patterned by transfer printing to form a wavy structure having periodic undulations on the PEDOT:PSS film, namely on the anode, thereby avoiding occurrence of total internal reflection within the organic electroluminescent device. Thus, most light can be propagated out through the substrate, thereby effectively improving a light extraction efficiency of a bottom-emission organic electroluminescent device.