What is the basic theory behind Tauc's Law for optical band gap calculation?

More Bulkesh Siwach's questions See All

How do we increase the resolution of an image?

I have an image having DPI value 100 but the publisher want it to be of atleast of 300 dpi...so what will be the solutions..please answer as soon as possible. Thanks

07 August 2018 5,925 5 View

What is the significance of cyclic voltammetry (CV) measurements in the field of counter electrodes for DSSCs?

I have prepared three carbon based electrodes like graphene, MWCNTs, GRAPHENE OXIDE etc. and need to note CV of these. Please tell is this measurement is necessary for these counter electrodes...

10 November 2017 6,851 4 View

Is it suitable to use drop casting method for depositing films of counter electrodes of DSSCs?

I am to deposite films of MWCNTs and graphene for counter electrode for DSSC. Actually I need some research papers that can explain this technique in a detailed way....thanks in advanced.

09 October 2017 3,170 3 View

Can cyclic voltammerty is possible for powdered samples without coating films?

If yes, please suggest me the way..for doing this. If NO then why?

06 July 2017 1,594 2 View

What is the theory on which Tauc plot is based upon for band gap measurements?

Please attach me some papers regarding this..

01 February 2017 3,476 5 View

Can we find porosity values of thin film using ImageJ software?

How we can find porosity values of thin films using this software? please write the steps if someone have used it.

01 February 2017 7,963 5 View

Where does the HUMO and LUMO levels locate in Black Dye?

i want to know the exact energy level values..please attach some papers regarding use of black dye in DSSC.

01 February 2017 7,795 0 View

What are the absorbance regions of black dye as i have used it in DSSC? can i get some papers?

I have used N749 black dye as sensitizer in DSSC.

09 October 2016 5,414 2 View

What is the maximum reported efficiency of DSSC device with carbon materials as counter electrodes?

So As to compare platinum CE device with the carbon materials CE like carbon nanotubes, graphene etc.

06 July 2016 4,665 3 View

What about the stability of DSSC at high temperatures?

is commercialization of DSSC possible?

03 April 2016 1,357 8 View

1. If I can quantize the atom using this hyperbolic spiral and classical physics, could nature do the same?

If we map as a continuous motion an ionising electron (beginning its journey at n=1) in an H atom, a specific hyperbolic spiral appears (see animation). When we solve this spiral formula, we find...

07 August 2024 5,343 2 View

How are iso-frequency contours plotted?

Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...

07 August 2024 1,937 1 View

Absorption coefficient of methane?

Hello, Can anyone provide me with the absorption coefficient of methane gas at 7.7 um? Any reference?

06 August 2024 980 5 View

How can I add own Henry coefficients in Aspen Plus?

Hi, i would like to simulate an absorption process in Aspen Plus. I want to use the NRTL model und would like to add some individual Henry coefficients. Is that possible and how?

05 August 2024 2,333 2 View

Why might the impedance values for DI water and 0.1X PBS buffer solution exhibit a decreasing and increasing trend, respectively over time (HP 4194A)?

Hello everyone, I'm encountering an issue with my electrochemical impedance spectroscopy (EIS) measurements and would appreciate some insights. Experimental Setup: Electrodes: Gold interdigitated...

05 August 2024 3,783 2 View

Why is TLC not a form of partition chromatography?

Why is TLC not a form of partition chromatography and paper chromatography not a form of absorption chromatography?

03 August 2024 7,035 3 View

Mossbauer spectroscopy Co0.6Mn0.4Fe2O4 MNPs?

Following curve related to Co0.6Mn0.4Fe2O4 Magnetic nanoparticles with extra phase a-Fe2O3. I will appreciate to help me to interpretation this spectroscopy, especially the blue line.

31 July 2024 9,140 2 View

¿Are oxygen vacancies in semiconductors capable to change the band gap?

Dear all! Oxygen vacancies do raise negatively the Fermi level by increasing the negative charge in the semiconductor crystal structure. In the case of n-type semiconductors, I wonder if this...

30 July 2024 8,339 2 View

How to build my own lab made four point probe set up?

Hello, I'm trying to measure the conductivity of semiconductor films but since I don't have a commercial four point probe set up I would like to build one on my own in my lab. I have generators,...

30 July 2024 906 2 View

How to calculate conductivity using Electrochemical Impedance Spectroscopy's Nyquist plot?

Hello everyone, I am new to this characterization but watching videos on youtube I have already plotted a Nyquist plot (Z' and -Z'') and already fitted models on my material using Zsim. But now I...

29 July 2024 1,376 0 View