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https://hdl.handle.net/2142/16618
Description
Title
Hall mobility of holes in silver bromide
Author(s)
Hanson, Roland Clements
Issue Date
1960
Doctoral Committee Chair(s)
Brown, F.C.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
silver bromide
Language
en
Abstract
Hall mobility measurements have been made on holes introduced into AgBr by a bromine atmosphere in the temperature range from room temperature to l50°Ce These measurements were made using conventional electrode geometry and sensitive high impedance a-c techniques similar to those used by Macdonald and Robinson.
The Hall mobility for holes varied from 2.0 ± 0.5 cm2/volt-sec at room temperature (27°C) to 0.5 + 0.15 cm2/volt-sec at 150°C. The hole mobility is about 30 times smaller than the electron mobility determined by other workers at room temperature. The temperature dependence of the hole mobility is about T-4. This is much steeper than the temperature dependence of the electron mobility in this region.
Preliminary measurements were also made on the thermoelectric power of AgBr in a bromine atmosphere. If the classical theory used is correct, these measurements indicate that the density of states effective mass for the holes is very small.
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