Surface photovoltage measurements in liquids

S. Bastide, D. Gal, David Cahen, L. Kronik

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


We present a simple, compact, and robust arrangement for surface photovoltage measurements of free semiconductor surfaces immersed in liquids. It is based on the classical Kelvin probe arrangement, where the semiconductor sample is put in a liquid-containing, electrically insulating vessel, with an optically transparent window, situated between the sample and the Kelvin probe. At the price of permitting relative, rather than absolute, contact potential difference values, this modification enables easy, routine surface photovoltage measurements of semiconductors in any kind of liquid ambient. The validity and efficiency of this approach are demonstrated by surface photovoltage spectra obtained from the p-InP(100) surface in various liquid etchants.

Original languageEnglish
Pages (from-to)4032-4036
Number of pages5
JournalReview of Scientific Instruments
Issue number10
StatePublished - Oct 1999
Externally publishedYes


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