Effect of Conjugation Pathway in Metal-Free Room-Temperature Dual Singlet-Triplet Emitters for Organic Light-Emitting Diodes

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

doi:10.1021/acs.jpclett.6b01907

Effect of Conjugation Pathway in Metal-Free Room-Temperature Dual Singlet-Triplet Emitters for Organic Light-Emitting Diodes

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

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

Abstract

Metal-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.

Original language	English
Pages (from-to)	4802-4808
Number of pages	7
Journal	Journal of Physical Chemistry Letters
Volume	7
Issue number	22
DOIs	https://doi.org/10.1021/acs.jpclett.6b01907
State	Published - 17 Nov 2016
Externally published	Yes

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Ratzke, W., Schmitt, L., Matsuoka, H., Bannwarth, C., Retegan, M., Bange, S., Klemm, P., Neese, F., Grimme, S., Schiemann, O., Lupton, J. M., & Höger, S. (2016). Effect of Conjugation Pathway in Metal-Free Room-Temperature Dual Singlet-Triplet Emitters for Organic Light-Emitting Diodes. Journal of Physical Chemistry Letters, 7(22), 4802-4808. https://doi.org/10.1021/acs.jpclett.6b01907

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title = "Effect of Conjugation Pathway in Metal-Free Room-Temperature Dual Singlet-Triplet Emitters for Organic Light-Emitting Diodes",

abstract = "Metal-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.",

author = "Wolfram Ratzke and Lisa Schmitt and Hideto Matsuoka and Christoph Bannwarth and Marius Retegan and Sebastian Bange and Philippe Klemm and Frank Neese and Stefan Grimme and Olav Schiemann and Lupton, {John M.} and Sigurd H{\"o}ger",

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doi = "10.1021/acs.jpclett.6b01907",

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Ratzke, W, Schmitt, L, Matsuoka, H, Bannwarth, C, Retegan, M, Bange, S, Klemm, P, Neese, F, Grimme, S, Schiemann, O, Lupton, JM & Höger, S 2016, 'Effect of Conjugation Pathway in Metal-Free Room-Temperature Dual Singlet-Triplet Emitters for Organic Light-Emitting Diodes', Journal of Physical Chemistry Letters, vol. 7, no. 22, pp. 4802-4808. https://doi.org/10.1021/acs.jpclett.6b01907

TY - JOUR

T1 - Effect of Conjugation Pathway in Metal-Free Room-Temperature Dual Singlet-Triplet Emitters for Organic Light-Emitting Diodes

AU - Ratzke, Wolfram

AU - Schmitt, Lisa

AU - Matsuoka, Hideto

AU - Bannwarth, Christoph

AU - Retegan, Marius

AU - Bange, Sebastian

AU - Klemm, Philippe

AU - Neese, Frank

AU - Grimme, Stefan

AU - Schiemann, Olav

AU - Lupton, John M.

AU - Höger, Sigurd

PY - 2016/11/17

Y1 - 2016/11/17

N2 - Metal-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.

AB - Metal-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.

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U2 - 10.1021/acs.jpclett.6b01907

DO - 10.1021/acs.jpclett.6b01907

M3 - Article

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SN - 1948-7185

VL - 7

SP - 4802

EP - 4808

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 22

ER -

Effect of Conjugation Pathway in Metal-Free Room-Temperature Dual Singlet-Triplet Emitters for Organic Light-Emitting Diodes

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