Interpretation of quantum yields exceeding unity in photoelectrochemical systems Academic Article uri icon


  • In photoelectrochemical systems involving light shining on a semiconductor interfaced with an electrolyte, the quantum yield as a function of photon frequency ν is observed to exhibit a peak at hν≊2Eg, where Eg is the band gap of the semiconductor. The maximum in this peak is sometimes found to exceed unity. We provide an interpretation involving surface states and inelastic electron-electron scattering. The theory indicates that the effect should be observable for p-type semiconductors, but not n-type.

author list (cited authors)

  • Szklarczyk, M., & Allen, R. E.

citation count

  • 4

publication date

  • October 1986