Quantum efficiency
Quantum efficiency is a unitless value, that states the incident photon to converted electron (IPCE). This measurement is usually given in %. The human eye, when adopted to the dark has a quantum efficiency of around 1-4%.[1][2]
Various photocathodes have different quantum efficiencies, depending on the wavelength of the incoming light. S-1 photocathodes have a quantum efficiency of up to 1% in the UV range and up to 0.5% in the IR range.[3] S-20 photocathodes have a quantum efficiency of up to 24.5% in the UV spectrum and a quantum efficiency of up to 1.5% in the IR range. S25 photocathodes have a quantum efficiency of up to 16.5% in the UV spectrum and up to 12.5% in the IR range (that being said the S-25's response range ranges farther into the IR range than the S-20).[4][5]
- ↑ https://opg.optica.org/josa/abstract.cfm?URI=josa-64-12-1706
- ↑ https://books.google.at/books/about/Image_Tubes.html?id=3BtOAQAAIAAJ&redir_esc=y
- ↑ https://books.google.at/books/about/Image_Tubes.html?id=3BtOAQAAIAAJ&redir_esc=y
- ↑ https://lambertinstruments.com/photocathodes
- ↑ https://www.researchgate.net/figure/Quantum-efficiency-of-different-photocathode-materials-Data-were-obtained-from-detector_fig9_41436013
