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Fluorescence enhancing under UV-NIR simultaneous-excitation in ZnS:Cu,Mn phosphors
3. T. Mishima, S. Itoh, G. Matuda, M. Yamamoto, K. Yamamoto, and H. Kiyama, Proceedings of the Technical Digest of the 9th PVSEC, Miyazaki, p. 243 (1996).
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The fluorescence properties of a long-lasting phosphor, ZnS:Cu,Mn was studied for the first time under simultaneously excitation of both UV and NIR light. Up to 20% fluorescence enhancement of the phosphor was observed. In the present simultaneously-excitation process, broad-band NIR light was absorbed and converted to visible photons via a single-photon upconversion path. We propose that a novel kind of spectral-conversion material with the unique ability to simultaneously convert both UV and NIR photons can be developed and is promising in the application of enhancing the EQE of solar cells.
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