Recent progress on exciplex-emitting OLEDs

The thermally-activated-delayed-fluorescence (TADF) characteristics makes exciplexes being the hot subject in the organic light-emitting diode (OLED) research field. The theoretical limit for the efficiency of the conventional fluorescent OLEDs have been leaped by exploiting the triplet harvesting a...

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Bibliographic Details
Published inJournal of Information Display Vol. 20; no. 3; pp. 105 - 121
Main Authors Kim, Hwang-Beom, Kim, Jang-Joo
Format Journal Article
LanguageEnglish
Published Taylor & Francis 03.07.2019
Taylor & Francis Group
한국정보디스플레이학회
Subjects
Exciplexes
organic light-emitting diodes
thermally activated delayed fluorescence
전기공학
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Summary:The thermally-activated-delayed-fluorescence (TADF) characteristics makes exciplexes being the hot subject in the organic light-emitting diode (OLED) research field. The theoretical limit for the efficiency of the conventional fluorescent OLEDs have been leaped by exploiting the triplet harvesting ability of exciplexes. Exciplexes are easily formed by blending electron donor molecules and electron acceptor molecules, which are generally hole transporting materials and electron transporting materials, respectively, resulting in easy access for employing exciplexes to OLEDs. We introduce the photo-physical characteristics of exciplexes derived from the charge-transfer characteristics and their application to OLEDs as emitters. Single exciplex-emitting OLEDs as well as exciplex emission-based white OLEDs are covered in this review.
ISSN:1598-0316
2158-1606
DOI:10.1080/15980316.2019.1650838