Photovoltaic Materials, Devices, and Technologies

Time-resolved fluorescence and ultrafast energy transfer in a zinc (hydr)oxide–graphite oxide mesoporous composite

[+] Author Affiliations
Jeff Secor, Veeshan Narinesingh, Robert R. Alfano

City College of New York, Institute for Ultrafast Spectroscopy and Lasers, Physics Department, 160 Convent Avenue, New York 10031, United States

Mykola Seredych, Dimitrios A. Giannakoudakis, Teresa Bandosz

City College of New York, Chemistry Department, 160 Convent Avenue, New York 10031, United States

J. Photon. Energy. 5(1), 053084 (Dec 10, 2015). doi:10.1117/1.JPE.5.053084
History: Received August 19, 2015; Accepted November 9, 2015
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Abstract.  Ultrafast energy decay kinetics of a zinc (hydr)oxide–graphite oxide (GO) composite is studied via time-resolved fluorescence spectroscopy. The time-resolved emission is spectrally decomposed into emission regions originating from the zinc (hydr)oxide optical gap, surface, and defect states of the composite material. The radiative lifetime of deep red emission becomes an order of magnitude longer than that of GO alone while the radiative lifetime of the zinc optical gap is shortened in the composite. An energy transfer scheme from the zinc (hydr)oxide to GO is considered.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Jeff Secor ; Veeshan Narinesingh ; Mykola Seredych ; Dimitrios A. Giannakoudakis ; Teresa Bandosz, et al.
"Time-resolved fluorescence and ultrafast energy transfer in a zinc (hydr)oxide–graphite oxide mesoporous composite", J. Photon. Energy. 5(1), 053084 (Dec 10, 2015). ; http://dx.doi.org/10.1117/1.JPE.5.053084


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