title: New model for the internal quantum efficiency of photodiodes based on photocurrent analysis.
abstract: A new expression for the internal quantum efficiency of a photodiode is presented. It is obtained from the analysis of the photocurrent generated within the diode, considering the power and the cross-sectional diameter of the incident beam. The model explains variations of the internal quantum efficiency with irradiance that are not explained by other existing models, although this experimental fact was already known. The well-known phenomenon of supraresponsivity is also explained with this model. Finally, we show the dependence of the internal quantum efficiency on the variables involved in the model.
authors.affiliation: Instituto de Fisica Aplicada, Consejo Superior de Investigaciones Cientificas, c/Serrano 144, Madrid 28006, Spain.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Ferrero
authors.forename: Joaquin
authors.initials: J
authors.lastname: Campos
authors.forename: Alicia
authors.initials: A
authors.lastname: Pons
authors.forename: Antonio
authors.initials: A
authors.lastname: Corrons