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Proceedings Paper

Photoemission analysis of chemically modified TlBr surfaces for improved radiation detectors
Author(s): A. J. Nelson; J.-S. Lee; J. A. Stanford; W. K. Grant; L. F. Voss; P. R. Beck; R. T. Graff; E. L. Swanberg; A. M. Conway; R. J. Nikolic; S. A. Payne; H. Kim; L. J Cirignano; K. Shah
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Paper Abstract

Device-grade TlBr was subjected to various chemical treatments used in room temperature radiation detector fabrication to determine the resulting surface composition and electronic structure. Samples of as polished TlBr were treated separately with 2%Br:MeOH, 10%HF, 10%HCl and 96%SOCl2 solutions. High-resolution photoemission measurements on the valence band electronic structure and Tl 4f, Br 3d, Cl 2p and S 2p core lines were used to evaluate surface chemistry. Results suggest anion substitution at the surface with subsequent shallow heterojunction formation. Surface chemistry and valence band electronic structure were further correlated with the goal of optimizing the long-term stability and radiation response.

Paper Details

Date Published: 26 September 2013
PDF: 8 pages
Proc. SPIE 8852, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XV, 88520E (26 September 2013); doi: 10.1117/12.2021675
Show Author Affiliations
A. J. Nelson, Lawrence Livermore National Lab. (United States)
J.-S. Lee, SLAC National Accelerator Lab. (United States)
J. A. Stanford, Lawrence Livermore National Lab. (United States)
W. K. Grant, Lawrence Livermore National Lab. (United States)
L. F. Voss, Lawrence Livermore National Lab. (United States)
P. R. Beck, Lawrence Livermore National Lab. (United States)
R. T. Graff, Lawrence Livermore National Lab. (United States)
E. L. Swanberg, Lawrence Livermore National Lab. (United States)
A. M. Conway, Lawrence Livermore National Lab. (United States)
R. J. Nikolic, Lawrence Livermore National Lab. (United States)
S. A. Payne, Lawrence Livermore National Lab. (United States)
H. Kim, Radiation Monitoring Devices, Inc. (United States)
L. J Cirignano, Radiation Monitoring Devices, Inc. (United States)
K. Shah, Radiation Monitoring Devices, Inc. (United States)


Published in SPIE Proceedings Vol. 8852:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XV
Michael Fiederle; Arnold Burger; Larry Franks; Ralph B. James, Editor(s)

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