Is Tauc Algorithm still valid for the calculation of the gap for multilayers after transmission UV-Vis-NIR measurements?

I usually perform the calculations of gap for monolayers with the formula [(Alph HNu *) ^ 0.5 = f (HNu)] because the interference fringes have a comode behavior (transmission maxima gradually...

31 December 2014 6,122 6 View

Details on Tauc Lorentz Parameters in Spectroscopic ellipsometry Fitting?

Hi every body! To those who use the Software S.E.A.from the Sopra Firm , to perform fits of their experimental data collected from a spectroscopic ellipsometer. Can you help me about Tauc Lorentz...

11 December 2014 1,054 1 View

What precautions should be taken when calculating an optical gap via reflectance UV-Vis-NIR measurements ?

When I calculate the optical gap of my thin films deposited on Corning glass via transmittance UV-Vis-NIR measurements , I find a different value than that I calculated via reflectance UV-Vis-NIR...

11 December 2014 7,722 8 View

Do you work with an Angstro Sciences ONYX-3 Magnetron Sputtering Cathode?

Is there anyone who is working with ONYX-3 Magnetron Sputtering Cathode? i meet some problems with plasma generation: i measure a current without having a plasma even if i use the appropriate...

08 September 2014 8,539 11 View

Is there a way to avoid 520cm-1 (516cm-1) peak in raman spectra?

Hi there, I wonder if there is a way to avoid the peak of c-Si substrate at 516cm-1 and 520 cm-1 Raman characterization, when we study the layers of an alloy of silicon deposited on a substrate...

07 August 2014 2,566 6 View

SIMS characterization and Compactness of thin films?

Hi there! How to describe the compactness of the layers (SiClayers) via the SIMS profiles? Thank You!

07 August 2014 5,925 5 View

Why can't make aluminum nitride film successfully by use sputter?

We use reactive sputtering process to make aluminum nitride film, and want to make c-axis aluminum nitride film on a silicon substrate, but the crystal orientation cannot be seen with...

03 March 2021 7,975 3 View

What thickness need for ITO to use as conductive layer?

I want to do RF sputtering of ITO on glass substrate using magnetron sputtering. what thickness do i need to make it good conductive layer to use it for PSC. Moreover, whats about thickness of...

01 March 2021 395 3 View

1 nm thick MgO thin-film to be deposited on Si wafer using thermal evaporation. What will be the optimum deposition conditions?

Favourable conditions of base pressure, rate of deposition. Also, by which characterisation technique to be used to verify the thickness of the deposited film.

28 February 2021 3,640 3 View

How to Eliminate cosine error and abbe error in LASER measurement system(for example Rhenishaw XL80)?

I like to do project in laser measurement system. My objective is to eliminate or reduce the cosine error, abbe error in Laser measurement system. I have Rhenishaw XL80 system. Please tell the...

28 February 2021 4,890 3 View

How can we limit artifacts caused by rotation in fiber photometry?

We are trying to run fiber photometry experiments for long time scales, but we get these sinusoidal artifacts that come up. We think they may be caused by twisting of the fiber optic subject...

25 February 2021 568 1 View

How to measure angle between laser travel path and machine axis in Laser Measurement system?

25 February 2021 1,987 3 View

How to prepare a thin polymer film by post-polymerization/crosslinking?

24 February 2021 2,362 5 View

Is is possible to pole with corona poling pellets of the sample material instead of thin films?

As it is highly probable that pellets will have a higher degree of air gaps and voids than thin films, is it possible to pole the samples with corona poling nevertheless? Or is there the...

24 February 2021 1,349 1 View

How to troubleshoot Electrochromic Films and Electrochromic Devices?

I am trying to characterize an electrochromic system. The system uses ITO electrodes on glass, WO3 as the electrochromic film, and NiO as the ion storage layer. When I deposit NiO and WO3 and...

23 February 2021 9,592 2 View

Have anyone checked before Cyclic voltammograms of intial ITO substrate and E-teck?

As a beginner in electrochemistry, I tried to obtain cyclic voltamograms of commercial anatase powder deposited on an ITO substrate or on Eteck. After several attempts, I noticed that my cyclic...

23 February 2021 3,175 3 View