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Laser Phosphoroscope and Applications to Room-Temperature Phosphorescence

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Abstract:

A simple phosphoroscope with no moving parts is described. In one scan the total luminescence, the long-lived phosphorescence, and the short-lived fluorescence can be determined. A 50% duty cycle excitation from a diode laser is used to excite the sample, and from the digitized waveform the phosphorescence is extracted from the off period, the total emission from the full cycle, and the fluorescence from the on period corrected for the phosphorescence contribution. The performance of the system is demonstrated using room-temperature phosphorescence of organic dyes in boric acid glasses, a multi-emissive boron-polymer dye, and a europium chelate.

Keywords: BORIC ACID GLASS; DELAYED FLUORESCENCE; FLUORESCEIN; PHOSPHORESCENCE; PHOSPHOROSCOPE

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/10-06223

Affiliations: 1: Chemistry Department, University of Virginia, Charlottesville, Virginia 22904, USA 2: Chemistry Department, University of Virginia, Charlottesville, Virginia 22904, USA. demas@virginia.edu 3: Chemistry Department, James Madison University, Harrisonburg, Virginia 22807, USA

Publication date: November 1, 2011

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