Dissecting Tetra-N-phenylbenzidine: Biphenyl as the Origin of Room Temperature Phosphorescence

Fries F, Louis M, Scholz R, Gmelch M, Thomas H, Haft A, Reineke S (2020)

Publication Status: Published

Publication Type: Journal article

Publication year: 2020

Journal

Journal of Physical Chemistry A American Chemical Society

Publisher: AMER CHEMICAL SOC

Book Volume: 124

Pages Range: 479-485

Journal Issue: 3

DOI: 10.1021/acs.jpca.9b09148

Abstract

Amorphous purely organic thin films are able to show efficient phosphorescence under ambient conditions at room temperature. This opens the perspective to a wide range of new applications, which have attracted lots of interest in the field of material science recently. Therefore, an increasing number of different molecules displaying room temperature phosphorescence (RTP) have already been reported. Whereas the efficiency, the lifetime, or the oxygen sensitivity is frequently discussed, the origin of RTP mainly remains vague. Often, material design rules tend to the development of increasingly complex structures. Here, the well-known tetra-N-phenylbenzidine (TPD), an archetypical material showing highly efficient fluorescence and RTP, is broken down to its fragments. As the complexity of the system decreases with the molecule's size, spectroscopic investigation of this molecular family enables a deeper understanding of the appearance of RTP. With spectral and time-resolved measurements, RTP can be detected for all compounds containing a biphenyl core, with lifetimes up to 0.9 s under inert gas conditions. These findings form the basis of a deeper understanding of the appearance of RTP in organic molecules and therefore allow for a more focused investigation of new materials.

Authors with CRIS profile

Max Gmelch

Involved external institutions

Technische Universität Dresden DE Germany (DE) Leibniz-Institut für Polymerforschung Dresden e. V. DE Germany (DE)

How to cite

APA:

Fries, F., Louis, M., Scholz, R., Gmelch, M., Thomas, H., Haft, A., & Reineke, S. (2020). Dissecting Tetra-N-phenylbenzidine: Biphenyl as the Origin of Room Temperature Phosphorescence. Journal of Physical Chemistry A, 124(3), 479-485. https://doi.org/10.1021/acs.jpca.9b09148

MLA:

Fries, Felix, et al. "Dissecting Tetra-N-phenylbenzidine: Biphenyl as the Origin of Room Temperature Phosphorescence." Journal of Physical Chemistry A 124.3 (2020): 479-485.

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