We report a detailed experimental and modeling study of efficiency for dielectric barrier discharge excited lamp containing mixtures of xenon and iodine. A survey of performance as functions of pressure, iodine partial pressure and excitation parameters indicates that the maximum efficiency of conversion from electrical output to UV (253nm) is in the range 1-2% in contrast to previous reports of efficiency > 20% [eg. Zhang and Boyd, J. Appl. Phys 84, 1174 (1998)]. The results are in good agreement with a 1-D rate-equation model of the discharge kinetics, which suggests that direct quenching of the upper states of the Xel* (B-X) transition (253nm) by I₂ limits the output efficiency.
|Title of host publication||Light sources 2007|
|Subtitle of host publication||proceedings of the 11th International Symposium on the Science and Technology of Light Sources, May 20th - 24th, 2007, Shanghai, China|
|Editors||M.Q. Liu, R. Devonshire|
|Place of Publication||Sheffield, UK|
|Number of pages||10|
|Publication status||Published - 2007|
|Event||International Symposium on the Science and Technology of Light Sources (11th : 2007) - Shanghai, China|
Duration: 20 May 2007 → 24 May 2007
|Conference||International Symposium on the Science and Technology of Light Sources (11th : 2007)|
|Period||20/05/07 → 24/05/07|
Carman, R. J., Ward, B. K., Mildren, R. P., & Kane, D. M. (2007). An Experimental and modelling study of efficiency for a 253nm xenon iodide lamp excited by a dielectric barrier discharge. In M. Q. Liu, & R. Devonshire (Eds.), Light sources 2007: proceedings of the 11th International Symposium on the Science and Technology of Light Sources, May 20th - 24th, 2007, Shanghai, China (pp. 271-280). Sheffield, UK: FAST-LS Ltd.