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I know that, but I don't think every material has the interesting properties that Si does for image sensors, i.e. it needs to basically turn photons of the righ
by wlievens 12y ago
I know that, but I don't think every material has the interesting properties that Si does for image sensors, i.e. it needs to basically turn photons of the right wavelength range into electrons.
- gus_massa 12y agoSorry. I misread your comment. Other users have answered the question, but I'd like to add a little more information. http://en.wikipedia.org/wiki/LED_circuit#LED_as_light_sensor http://en.wikipedia.org/wiki/LED_circuit#LED_as_light_sensor > As a photodiode, an LED is sensitive to wavelengths equal to or shorter than the predominant wavelength it emits. For example, a green LED is sensitive to blue light and to some green light, but not to yellow or red light. If you want to measure the light of all visible wavelength, you must use a semiconductor with a low band gap, for example the named in the other comments: Germanium, Silicon or Gallium Arsenide It's interesting to read the table in http://en.wikipedia.org/wiki/List_of_semiconductor_materials#Table_of_semiconductor_materials http://en.wikipedia.org/wiki/List_of_semiconductor_materials... but it's important to sort it by band gap fist, o you an compare the applications of semiconductor with a similar band gap.
- jacquesm 12y agoYou could use Selenium as well.