GaNo Opto: GaN UV sensor with SMD2835 package (Part No. GS-AB-2835S)

      G Company, Korea: GaN UV sensor with SMD3528 package (Part No. GUVA-S12SD)

      1) The GS-AB-2835S UV sensor of GaNo Opto has higher responsivity in the wavelength region of UVA and UVB, and is more suitable for UV index measurement of sunshine;

      2) The UV/visible rejection ratio of GaNo’sUV sensor is one order of magnitude higher than that of the UV sensor produced by G Company, which indicates that GaNo’s UV sensor is less vulnerable to background visible light and could exhibit a higher SNR (signal to noise ratio).

      1) The UV sensor of GaNo Opto exhibits a very fast response speed, with its rise/fall time both in sub-microsecond level;

      2) The UV sensor of G Company exhibits a very slow response speed and extremely unstable photocurrent output, which is only suitable for very low-end applications.

4. Performance consistencyComparison result:

      1) Among ten sample devices each randomly selected, GaNo’s UV sensors exhibit highly consistent output photocurrent signal; while G Company's UV sensors exhibit very poor output consistency and thus require frequent calibration in practical applications.

      2) The photocurrent output of GaNo’s UV sensor only exhibits slight and consistent rise with increasing external bias; while G Company's UV sensor shows disordered variation as a function of external bias, thus is very hard to use in real applications.

Conclusion:

      With more advanced device manufacturing technologies, the GaN UV sensor produced by GaNo Opto is superior to the similar UV sensor produced by G Company of South Korea in terms of comprehensive performance and device consistency.