Why a wide band gap semiconductor work As a photo electrochemical cell but not as photodetector ?

Poshan kumar reddy Kuppam @Poshan-Kumar-Reddy-Kuppam

10 August 2018 1 3K Report

I deposited amorphous F doped al203 on quartz and SI substrate and check the band gap is around 5.3eV .it is working very well for photoelectrochemical cell on SI substrate and it was failed on quartz substrate for photodetector .I used TI/Al as ohmic contact for photodetector .the thickness is above 250nm .I hope the photo current is not substrate in case of photo electrochemical cell .can you please suggest your view ? Why this happen ?

Mohammad Soroosh

for using a photodetector, the following inequality is necessary:

(1.24/light wavelength) > 5.2

Please check it.

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