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Static, transient or modulated light excitation pro and con The time-resolved or frequency-modulated, surface photovoltage spectroscopy (SPS) is based on a time-resolved/frequency modulated measuremen

Comparison between MPD and SPV techniques MDP (microwave detected photoconductivity): sensitive to moving photogenerated charge carriers (bulk property) SPV (surface photovoltage): sensitive to surfac

SPV signal analysis: fits and simulations Charge dynamic simulations in photoactive materials, incl. heterojunction photoactive materials. We are currently developing simulation tools to enable first

Electrical and optical characterization using SPV/Kelvin Photocarrier generation and separation mechanisms Minority carrier lifetime measurement/Diffusion length calculations Trapped carrier dynamics,

Publications for HS-SPS Dittrich, T. and Fengler, S. (2025). Surface Photovoltage Spectroscopy of Ultrawide Bandgap Materials. Phys. Status Solidi RRL 2400384. https://doi.org/10.1002/pssr.202400384 D

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HR-SPS Technology Electrical and optical characterization using surface photovoltage spe Photocarrier generation and separation mechanisms, Minority carrier lifetime measurement/Diffusion length calcu

SPS/SPV Applications Silicon photovoltaic – Wafer check after diamond wire sawing Learn more Contactless detection of bulk polarization phenomena in semiconductors Learn more Electronic transitions in