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Get Free AccessMetal-free dual singlet–triplet organic light-emitting diode (OLED) emitters can provide direct insight into spin statistics, spin correlations and spin relaxation phenomena, through a comparison of fluorescence to phosphorescence intensity. Remarkably, such materials can also function at room temperature, exhibiting phosphorescence lifetimes of several milliseconds. Using electroluminescence, quantum chemistry, and electron paramagnetic resonance spectroscopy, we investigate the effect of the conjugation pathway on radiative and nonradiative relaxation of the triplet state in phenazine-based compounds and demonstrate that the contribution of the phenazine nπ* excited state is crucial to enabling phosphorescence.
Wolfram Ratzke, Lisa Schmitt, Hideto Matsuoka, Christoph Bannwarth, Marius Retegan, Sebastian Bange, Philippe Klemm, Frank Neese, Stefan Grimme, Olav Schiemann, John M. Lupton, Sigurd Höger (2016). Effect of Conjugation Pathway in Metal-Free Room-Temperature Dual Singlet–Triplet Emitters for Organic Light-Emitting Diodes. The Journal of Physical Chemistry Letters, 7(22), pp. 4802-4808, DOI: 10.1021/acs.jpclett.6b01907.
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Type
Article
Year
2016
Authors
12
Datasets
0
Total Files
0
Language
English
Journal
The Journal of Physical Chemistry Letters
DOI
10.1021/acs.jpclett.6b01907
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