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As a characterization technique, photocurrent is commonly used to study charge properties such as excitons of semiconductor nanostructutres and other light absorbing materials 
When a suitable radiation is used, the photoelectric current
- is directly proportional to intensity of radiation.
- increases with the increase in accelerating potential till the stage is reached when photo-current becomes maximum and does not increase with further increase in accelerating potential. The highest(maximum) value of the photo-current is called saturation current. The value of retarding potential at which photo-current becomes zero is called cut-off voltage or stopping potential for the given frequency of the incident ray.
- O. D. D. Couto; J. Puebla; E.A. Chekhovich; I. J. Luxmoore; C. J. Elliott; N. Babazadeh; M.S. Skolnick; A.I. Tartakovskii; A. B. Krysa (2011). "Charge control in InP/(Ga,In)P single quantum dots embedded in Schottky diodes" (PDF). Phys. Rev. B. 84 (12): 7. Bibcode:2011PhRvB..84d5306P. doi:10.1103/PhysRevB.84.125301.
- This article incorporates public domain material from the General Services Administration document "Federal Standard 1037C".
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