Abdul Ghafar Wattoo

7 Questions 38 Answers 0 Followers

Questions related from Abdul Ghafar Wattoo

Can you please suggest me any material (Alloy) having high reflection in UV-Vis-NIR regions?

Hello everyone,Can anyone please suggest me any ceramic material (Alloy) having high reflection in the UV-Vis-NIR regions? We want to deposit highly reflecting ceramic coatings by Magnetron...

03 March 2017 7,580 14 View

The Color of the coating is changed with the thickness. What is reason behind this?

I have deposited TiAlN coatings by magnetron sputtering of various thicknesses. The color of the coatings is changed with change in thickness, what is the reason, please?

04 April 2016 8,118 8 View

How to find the Band gap energy of an Oxide Semiconductor from Photoluminescence spectra?

1. Is it possible to find that whether the material is Direct or Indirect bandgap semiconductor from PL spectra? 2. What other information, we can get from PL spectra? THANKS

09 September 2015 1,702 9 View

How can I calculate Absorption coefficient from Reflectance data?

I have done UV-Vis experiment at Perkin-Elmer 950 UV-Vis spectrometer, and obtained reflectance data. Thickness of the powder sample (pellet) is more than 4 mm, can I assume T=0 and R+A=1 for...

05 May 2015 355 2 View

Hi, Can you please suggest me any anti-reflection coating material?

I am working on absorption films, how can I overcome reflection in Ti/SiO2 coating?

01 January 2015 5,464 24 View

How can I find the band gap energy in case of semiconducting thin films from reluctance or transmittance data?

I have data of reflecatnce and transmittance. Direct band gap energy can be calculated by plotting Photon energy (hv) versus square of absorption coefficient*photon energy and then drawing a...

01 January 2015 6,618 8 View

Which material has the maximum absorption in the UV and near IR region?

Which material has the maximum absorption in the UV and near IR region? Is there any material that has maximum absorbance from 200 to 600 nm?

11 November 2014 9,120 8 View