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Toward Electrically Pumped Organic Diode Lasers: Electroluminescence of Proton Transfer Polymers

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Abstract

Electroluminescence from a series of polymers and copolymers which exhibit photoinduced excited-state intramolecular proton transfer (ESIPT) is reported. Among these polymers containing ESIPT moieties in the main chain or side chain are poly(1,4-(2-hydroxy)phenylene benzobisthiazole-co-decamethylene benzobisthiazole), poly(styrene-co-3-hydroxy-4s'-ethenylflavone) and poly(2,5-benzoxazolediyl(2,2,2,-trifluoro-1-(trifluoromethyl) ethylidene)-5,2-benzoxazolediyl-4-hydroxy-1,3-phenylene). The electroluminescence spectra of these polymers are identical to their photoluminescence spectra, indicating that electroluminecence originates from electrically-generated intramolecular proton transfer (EGIPT). Because electroluminescence from EGIPT implies electrically-induced population inversion, these results demonstrate the possibility of electrically-pumped organic solid-state laser diodes.

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Acknowledgement

This work was supported by the Office of Naval Research and the National Science Foundation (CHE-9120001, CTS-9311741).

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Authors and Affiliations

  1. Departments of Chemical Engineering and Chemistry, University of Rochester, Rochester, NY, 14627-0166., USA

    Xuejun Zhang, Richard M. Tarkka & Samson A. Jenekhe

  2. Department of Chemistry, The Florida State University, Tallahassee, FL, 32306-3006., USA

    Joseph B. Schlenoff

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  1. Xuejun Zhang
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  2. Richard M. Tarkka
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  3. Samson A. Jenekhe
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  4. Joseph B. Schlenoff
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Zhang, X., Tarkka, R.M., Jenekhe, S.A. et al. Toward Electrically Pumped Organic Diode Lasers: Electroluminescence of Proton Transfer Polymers. MRS Online Proceedings Library 488, 545–550 (1997). https://doi.org/10.1557/PROC-488-545

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