Hi, 

I am working on fabrication of ZnO UV photodiodes. I wish to know the exact formula for the calculation of External Quantum Efficiency (EQE) of UV photodiodes. 

With Photoresponsivity (R), in some papers, it is mentioned as,

EQE = 1240 x (R/λ)

while in some papers, it is mentioned it as,

EQE = 1240 x (R/λ) x 100%. 

Where 'R' is Photoresponsivity and  λ in the wavelength of incident light)

Can you please clarify me which of the above-mentioned  formulae is correct?and whether we have to multiply the EQE value with 100%?

Kindly support with some literature for your answers

Thanks in advance. 

-Amir

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