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Ultraviolet downconverting phosphor for use with silicon CCD imagers
Applied Optics
|March 18, 2010
Summary
Coronene, a UV downconverting phosphor, shows potential for silicon charge-coupled devices (CCDs). It exhibits useful response down to 584 A and ~20% conversion efficiency at 2537 A.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Silicon charge-coupled devices (CCDs) are widely used in imaging.
- Ultraviolet (UV) light detection by CCDs can be challenging due to material limitations.
Purpose of the Study:
- To investigate the properties and application of coronene as a UV downconverting phosphor for silicon CCDs.
- To assess coronene's spectral response and conversion efficiency for improved UV imaging.
Main Methods:
- Absorption spectrum measurements of coronene extended below 1000 A.
- Measurement of coronene's average conversion efficiency at 2537 A.
- Imaging experiments using a CCD coated with coronene at 3650 A.
Main Results:
- Coronene shows useful UV response down to at least 584 A.
- The average conversion efficiency of coronene was measured to be approximately 20% at 2537 A.
- Successful imagery was obtained at 3650 A using a coronene-coated backside illuminated CCD.
Conclusions:
- Coronene is a promising UV downconverting phosphor for enhancing silicon CCD performance in UV detection.
- The material's spectral response and conversion efficiency suggest its utility in UV imaging applications.
