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Degradation of Ru(bpy)32+-based OLEDs

Published online by Cambridge University Press:  01 February 2011

Velda Goldberg ,
Michael Kaplan ,
Leonard Soltzberg ,
Joseph Genevich ,
Rebecca Berry ,
Alma Bukhari ,
Sherina Chan ,
Megan Damour ,
Leigh Friguglietti  and
Erica Gunn
...Show all authors
Velda Goldberg
Affiliation:
Physics, Simmons College, Boston, Massachusetts
Michael Kaplan
Affiliation:
Physics, Simmons College, Boston, Massachusetts Chemistry, Simmons College, Boston, Massachusetts
Leonard Soltzberg
Affiliation:
Chemistry, Simmons College, Boston, Massachusetts
Joseph Genevich
Affiliation:
Physics, Simmons College, Boston, Massachusetts
Rebecca Berry
Affiliation:
Physics, Simmons College, Boston, Massachusetts Chemistry, Simmons College, Boston, Massachusetts
Alma Bukhari
Affiliation:
Physics, Simmons College, Boston, Massachusetts Chemistry, Simmons College, Boston, Massachusetts
Sherina Chan
Affiliation:
Physics, Simmons College, Boston, Massachusetts Chemistry, Simmons College, Boston, Massachusetts
Megan Damour
Affiliation:
Physics, Simmons College, Boston, Massachusetts Chemistry, Simmons College, Boston, Massachusetts
Leigh Friguglietti
Affiliation:
Physics, Simmons College, Boston, Massachusetts Chemistry, Simmons College, Boston, Massachusetts
Erica Gunn
Affiliation:
Physics, Simmons College, Boston, Massachusetts Chemistry, Simmons College, Boston, Massachusetts
Karen Ho
Affiliation:
Physics, Simmons College, Boston, Massachusetts Chemistry, Simmons College, Boston, Massachusetts
Ashley Johnson
Affiliation:
Physics, Simmons College, Boston, Massachusetts Chemistry, Simmons College, Boston, Massachusetts
Yin Yin Lin
Affiliation:
Physics, Simmons College, Boston, Massachusetts Chemistry, Simmons College, Boston, Massachusetts
Alisabet Lowenthal
Affiliation:
Physics, Simmons College, Boston, Massachusetts Chemistry, Simmons College, Boston, Massachusetts
Seiyam Suth
Affiliation:
Physics, Simmons College, Boston, Massachusetts Chemistry, Simmons College, Boston, Massachusetts
Regina To
Affiliation:
Physics, Simmons College, Boston, Massachusetts Chemistry, Simmons College, Boston, Massachusetts
Regina Yopak
Affiliation:
Physics, Simmons College, Boston, Massachusetts Chemistry, Simmons College, Boston, Massachusetts
Jason D. Slinker
Affiliation:
Materials Science and Engineering, Cornell University, Ithaca, New York
George G. Malliaras
Affiliation:
Materials Science and Engineering, Cornell University, Ithaca, New York
Samuel Flores-Torres
Affiliation:
Chemistry and Chemical Biology, Cornell University, Ithaca, NY.
Hector D. Abruña
Affiliation:
Chemistry and Chemical Biology, Cornell University, Ithaca, NY.
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Abstract

Analysis of the possible mechanisms of degradation of Ru(bpy)32+-based OLEDs has led to the idea of quencher formation in the metalloorganic area close to the cathode. It has been suggested that the quencher results from an electrochemical process where one of the bipyridine (bpy) groups is replaced with two water molecules [1] or from reduction of Ru(bpy)32+ to Ru(bpy)30 [2]. We have tested these and other degradation ideas for Ru(bpy)32+-based OLEDs, both prepared and tested with considerable exposure to the ambient environment and using materials and procedures that emphasize cost of preparation rather than overall efficiency. In order to understand the mechanisms involved in these particular devices, we have correlated changes in the devices' electrical and optical properties with MALDI-TOF mass spectra and UV-vis absorption and fluorescence spectra.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 846: Symposium DD – Organic and Nanocomposite Optical Materials , 2004 , DD11.11
Copyright
Copyright © Materials Research Society 2005

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References

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