Amiruddin Rafiudeen

11 Questions 26 Answers 0 Followers

Questions related from Amiruddin Rafiudeen

Molybdenum disulphide (MoS2) is it an intrinsic p-type semiconducting layers?

Dear All, Molybdenum disulphide (MoS2) is it an intrinsic p-type semiconducting layers? Please support your answers with possible research papers?

22 January 2018 9,418 0 View

Reason for increase in optical transparency for ZnO and SnO?

Friends, I have a basic doubt. It is well known fact, when ZnO is doped with Al or Ga, the transparency in visible region increases. Similarly for the case of Indium doped Tin Oxide (ITO). 1)...

03 April 2017 9,182 11 View

Formula to calculate SNR ratio for UV photodiodes?

Dear Friends, Need your help to calculate SNR ratio for ZnO based UV photodiodes. As far as I collected the information, SNRdB = 20 log (Isignal/Inoise). In the above formula, I wish to know...

21 November 2016 3,562 3 View

Calculation of External Quantum Efficiency of Photodiodes?

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...

27 March 2016 8,051 6 View

Reason for decrease in band gap of ZnO nanowires ?

I am currently working in ZnO nanowires deposited over glass substrates. From Tauq's plot, I observed the value of band gap for : 1) Uniform ZnO thin films : 3.30 eV 2) Vertically aligned ZnO...

20 March 2016 4,577 13 View

Is it possible to identify the dopants related peaks in ZnO thin films using Raman spectroscopy?

Hi, I am working on ZnO based thin films using various dopants like Al, Ga, P, N etc.,Is there any possibility to identify peaks related to these doping elements (which is less than 1 at%) using...

13 March 2016 3,076 6 View

Can anyone help me with band gap of PEDOT:PSS?

I am working on PEDOT:PSS (Sigma aldrich, 1.3% dispersed) Friends I wish to clarify the following: 1) Whether the band gap of PEDOT:PSS is indirect band gap? Can it be used as absorber layer in...

05 January 2016 1,177 8 View

What is the best method to ETCH ZnO films from glass substrates?

I using Dip coating method to deposit ZnO films on glass substrate. The ZnO films will be deposited on both the side of the glass substrates. I would like to etch out one side of ZnO completely to...

14 December 2015 703 9 View

How do I calculate the external quantum efficiency of ZnO based UV photodiodes?

I am working on ZnO based p-i-n photodiodes. Responsivity is : 58.02 A/W at 3VWavelength detection : 365 nm How can I calculate External Quantum Efficiency (EQE),? Please reply. Support with...

12 August 2015 5,066 4 View

Can you help me to calculate the responsiveness of ZnO based Photodiodes?

During I-V measurement, under illumination of UV light (325 nm) upon p-n ZnO diodes, the value of current increases. Can anyone please help me how to calculate the responsivity of the fabricated...

06 June 2015 601 4 View

ZnO homojunction diode is showing turn-ON around 4V, current 80mA. But no emission, why?

I have fabricated ZnO based p-n homojunction diode with turn-ON around 4V current at 80mA. PL spectra shows strong emission in UV region (375 nm). But I am unable to view any UV/visible emission...

23 March 2015 1,866 7 View