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Journal Article
Highly Twisted Pyrene Derivatives for Non-Doped Blue OLEDs
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- Authors
- Sang Bong Lee, Kwang Hun Park, Chul Woong Joo, Jeong-Ik Lee, Jonghee Lee, Yun-Hi Kim
- Issue Date
- 2016-05
- Citation
- Dyes and Pigments, v.128, pp.19-25
- ISSN
- 0143-7208
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- New highly twisted rigid blue light-emitting materials were designed, composed of pyrene with a xylene core unit and either naphthalene or phenyl end units. These blue-emitting materials were synthesized via the Suzuki cross-coupling reaction and their structures were confirmed using FT-IR, 1H NMR, 13C NMR, and mass spectroscopy. The optical, electrochemical and thermal properties of the materials were investigated. The non-coplanar structure introduced by highly twisted xylene units provides steric hindrance, resulting in very deep blue emission. The fabricated devices exhibited a maximum external quantum efficiency (EQE) of 3.69% with CIE color coordinates (x, y: 0.15, 0.06).
- KSP Keywords
- 1H NMR, Blue OLEDs, Blue emission, Blue light-emitting, Blue-emitting materials, Deep blue, External Quantum Efficiency, Fourier Transform Infrared Spectroscopy(FTIR), Light-emitting materials, Non-coplanar, Non-doped