Chetan Singh

16 Questions 14 Answers 0 Followers

Questions related from Chetan Singh

How epitaxial thin films are characterized by XRD and what is the role of phi and omega scan in it?

29 June 2022 4,572 0 View

What is the role of different layers in YBCO based high temperature superconducting tapes?

05 June 2022 5,815 2 View

What is the mechanism of phase transformation of methyl ammonium lead iodide crystal from tetragonal to cubic at 60C?

20 December 2018 2,866 0 View

Which defect like cation interstitial or oxygen vacancies affects electrical resistivity in ZnO thin films?

Defects such as cation interstitial and oxygen vacancies affects electrical resistivity in ZnO films so which one has more pronounced effect on electrical properties in ZnO.

03 June 2016 3,265 5 View

When one dope Al in ZnO what is the exact position of aluminium states in ZnO band gap?

What is the exact position of Al, when one dope Al in ZnO

05 April 2016 1,279 4 View

How does the generation of zinc interstitial enhance the electrical conductivity in ZnO films?

Zinc Interstitial forms a defect near conduction band of ZnO and generally oxygen vacancy forms a deep level defect. So its it possible that generation of Zinc interstitial enhances the...

16 October 2015 1,116 1 View

What is the effect of film thickness on electrical properties of al-doped ZnO films?

Generally increase of thickness leads to decrease of electrical resistivity but sometimes it starts to increase. What would be possible mechanism behind this?

16 June 2015 1,339 5 View

I want to determine chemical composition of al doped ZnO films deposited on glass substrates so which characterization technique will be suitable?

For determination of chemical composition of al doped zno films on glass substrate which characterization technique will be suitable.

30 March 2015 6,846 6 View

Is it possible that residual argon present in sputtering chamber etch the thin films at high temperature (350-400C)?

at high temperature (350-400C) is it possible residual argon can etch away the film in chamber

21 February 2015 162 4 View

What is the difference between Surface band gap and bulk band gap?

I want to correlate band gap values got from two technique 1) Tauc plot which will give overall band gap 2) Scanning tunneling spectra (STS) or Scanning tunneling microscopy

24 September 2014 7,730 3 View

Can we compare band gap obtained from optical spectra and scanning tunneling spectroscopy?

I want to compare band gap values obtained from tauc plot and scanning tunneling spectra.

12 September 2014 1,105 3 View

How do you calculate the surface potential values of thin films from SKPFM (Surface kelvin probe force microscope)?

I want to calculate surface potential of ZnO films grown on Glass substrate from SKPFM. I took a image in SKPFM mode with Pt-ir probe in AFM.

01 July 2014 9,310 2 View

Do you have any advice for preparation of Nano-dots by RF sputtering?

I am planning to synthesize Nano-dots by RF sputtering of zinc oxide on glass substrate.

12 June 2014 885 2 View

Why i am getting a continuous decreasing graph from lower wavelength (300nm) to higher wavelength (1000nm) in UV-VIS spectra?

I am getting continuous decreasing spectra in the UV Visible region.

09 April 2014 6,148 3 View

How do you distinguish between SnS, SnS2 ans Sn2S3 during formation of TIn Sulphide by chemical route?

Chemical bath deposition can form SnS, SnS2 ans Sn2S3 compounds.

29 January 2014 6,971 4 View

Ψ (amplitude ratio) and Δ (change in phase) data interpretation in ellipsometry?

I have Ψ (amplitude ratio) and Δ (change in phase) data as function of wavelength. I want to analyze optical properties of films.

10 January 2014 7,232 6 View