Fluorescence organic light-emitting diodes with 100% internal EL quantum efficiency

2015 Fiscal Year Final Research Report

• Project/Area Number: 26810110
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Organic and hybrid materials
• Research Institution: Kyushu University
• Principal Investigator: Nakanotani Hajime 九州大学, 工学(系)研究科(研究院), 准教授 (90633412)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 有機半導体 / 有機分子 / 有機・分子エレクトロニクス

Outline of Final Research Achievements

We demonstrate an novel pathway for high-efficient fluorescence-based OLEDs by applying the general concept of thermally activated delayed fluorescence (TADF) to a assistant dopant, resulted in the fluorescence-OLEDs showed exciton production efficiency reached nearly 100%. In addition, the enhancement of operational stability compared to that of OLEDs using the TADF molecules as emitters was observed, indicating that the our proposed energy transfer process can provide dual enhancement of both EL efficiency and operational stability in OLEDs by rapid upconversion of triplet excitons.

Free Research Field

有機光エレクトロニクス