Third-generation organic electroluminescence materials

Research output: Contribution to journalReview article

234 Citations (Scopus)

Abstract

Currently, organic light-emitting diodes (OLEDs) have reached the stage of commercialization, and there are intense efforts to use them in various applications from small-and medium-sized mobile devices to illumination equipment and large TV screens. In particular, phosphorescent materials have become core OLED materials as alternatives to the conventionally used fluorescent materials because devices made with phosphorescent materials exhibit excellent light-emitting performance. However, phosphorescent materials have several problems, such as their structure being limited to organic metal compounds containing rare metals, for example, Ir, Pt, and Os, and difficulty in realizing stable blue light emission, so the development of new materials is necessary. In this article, I will review next-generation OLEDs using a new light-emitting mechanism called thermally activated delayed fluorescence (TADF). Highly efficient TADF, which was difficult to realize with conventional technologies, has been achieved by optimizing molecular structures. This has led to the realization of ultimate next-generation OLEDs that are made of common organic compounds and can convert electricity to light at an internal quantum efficiency of nearly 100%.

Original languageEnglish
Article number060101
JournalJapanese Journal of Applied Physics
Volume53
Issue number6
DOIs
Publication statusPublished - Jun 2014

Fingerprint

Electroluminescence
electroluminescence
light emitting diodes
Organic light emitting diodes (OLED)
fluorescence
commercialization
metal compounds
electricity
Fluorescence
organic compounds
light emission
quantum efficiency
molecular structure
illumination
Light emission
Metals
Quantum efficiency
Organic compounds
Mobile devices
Molecular structure

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Third-generation organic electroluminescence materials. / Adachi, Chihaya.

In: Japanese Journal of Applied Physics, Vol. 53, No. 6, 060101, 06.2014.

Research output: Contribution to journalReview article

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