文章信息/Info

Title:

High�睧fficiency Tandem Organic Light�睧mitting Diodes and Their Fabrication Techniques

作者:

廖良生1; 2; 王強1; 李述湯1; 2

(1.蘇州大學 功能納米與軟物質研究院，江蘇 蘇州 215123)（2.江蘇省產業技術研究院有機光電技術研究所，江蘇 蘇州 215211)

Author(s):

LIAO Liangsheng1; 2;  WANG Qiang1;  LEE Shuit�睺ong1; 2

(1.Institute of Functional Nano & Soft Materials, Soochow University, Suzhou 215123, China)（2.Institute of Organic Optoelectronics, Jiangsu Industrial Technology Research Institute, Suzhou 215211, China）

關鍵詞:

疊層有機發光二極管; 內部連接層; 大面積顯示和照明; 器件制備技術

Keywords:

tandem organic light-emitting diode;  intermediate connector;  large�瞐rea display and lighting;  device fabrication techniques

DOI:

10.7502/j.issn.1674-3962.2018.10.01

文獻標志碼:

A

摘要:

有機發光二極管（OLED）是通過有機材料獲得電致發光的一種半導體二極管，它可廣泛用于新一代信息顯示和健康照明。由于OLED是一種電流驅動器件，器件的發光亮度與工作壽命具有相反的變化趨勢，因此，OLED的發光亮度和工作壽命一直是其走向市場的主要障礙。為了緩解OLED發光亮度與工作壽命的內在矛盾，人們提出了疊層OLED的器件結構。疊層OLED是通過特殊的內部連接層，把多個有機發光（EL）單元在器件內部進行電學串聯而形成的一種新型OLED，它可以同時具備高效率和長壽命的特點。為此，主要基于作者團隊的前期工作，重點討論了疊層OLED的設計原理及其選擇內部連接層材料的幾個原則；提出了器件性能的優化方法；并介紹了團隊在國家“863”計劃和國家重點研發計劃支持下所進行的OLED生產示范線的設計與制造。最后，對我國OLED技術的產業化發展提出了簡要的看法。

Abstract:

Organic light�瞖mitting diode (OLED) is a brand new display and lighting technology, utilizing the electroluminescence (EL) of organic molecules. One of the key issues impeding the commercialization of OLED is its light�瞖mitting efficiency and operational lifetime. A tandem OLED consists of multiple electroluminescence (EL) units, connected by unique intermediate connectors. The current efficiency and lifetime of a tandem OLED with N EL units can be more than N times those of the individual OLED unit. Hence, tandem OLEDs provide a promising approach to fabricate highly efficient and long lifetime displays and solid�瞫tate lightings. The charge generation ability and charge injection of the intermediate connector in a tandem OLED determine the performance of the device. Meanwhile, the transparency and the optical path also have an impact on the light output. Therefore, both the electrical and the optical properties of the intermediate connectors should be considered during the design of tandem OLEDs. To capitalize on the advantages of tandem OLEDs, the manufacturing equipment should also be specially designed and developed. Here, we systematically introduce the advantages, design principles, and optimization of tandem OLEDs. Combined with the research and development of manufacturing equipment, we further elaborate the importance and urgency of establishing the OLED product chain in China.