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- W2068409213 abstract "A method for growth of single-crystal silicon doped heavily, with thallium has been developed to make use of the good match of the thallium acceptor cutoff wavelength (5.0μ) to the 3-5μ atmospheric window. The method involves recrystallization of silicon from a tin-thallium solution kept saturated by a silicon source wafer. Growth conditions used success fully to date range from 1100°C to 1370°C in growth temperature, and from 7% to 50% tin fraction in the tin-thallium solvent. The thallium doping increases monotonically with increas, ing growth temperature or thallium fraction in the solvent. A model of the dependence of the thallium doping on temperature and solvent composition is presented, as well as the estimated solubility limit of thallium in silicon. The most heavily doped crystal was grown at 1370°C from a Sn.14T1.86 solvent, and produced a maximum photoionization absorption of 2cm-1 at 3μ. This corresponds to a predicted quantum efficiency of 18% in a 1-mm thick detector. The Hall mobility of the grown material near liquid nitrogen temperature is found to approach 2000cm2/V-sec." @default.
- W2068409213 created "2016-06-24" @default.
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- W2068409213 date "1981-06-11" @default.
- W2068409213 modified "2023-09-26" @default.
- W2068409213 title "<title>Solution Growth Of Thallium-Doped Silicon For 3-5 Micrometer Photoconductive Detectors</title>" @default.
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- W2068409213 doi "https://doi.org/10.1117/12.965807" @default.
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