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Surface photovoltage (SPV) techniques provide information about
photoactive materials with respect to charge separation in space.
This book aims to share experience in measuring and analyzing SPV
signals and addresses researchers and developers interested in
learning more about and in applying SPV methods. For this purpose,
basics about processes in photoactive materials and principles of
SPV measurements are combined with examples from research and
development over the last two decades.SPV measurements with Kelvin
probes, fixed capacitors, electron beams and photoelectrons are
explained. Details are given for continuous, modulated and
transient SPV spectroscopy. Simulation principles of SPV signals by
random walks are introduced and applied for small systems.
Application examples are selected for the characterization of
silicon surfaces, gallium arsenide layers, electronic states in
colloidal quantum dots, transport phenomena in metal oxides and
local charge separation across photocatalytic active crystallites.
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