How to calculate the absorption coefficient of a semiconductor numerically?

If I know the band gap if a certain semiconductor, and I would like to calculate the value of the absorption coefficient numerically using the following equation: how to determine the values of...

01 February 2017 3,297 1 View

Can anyone suggest a solar cell Modeling software for beginners?

10 November 2016 2,278 43 View

What is the best method to fabricate Gold counter electrode for QDSSCs?

02 March 2016 2,724 2 View

How to prevent the re-stacking of Graphene Oxide after reduction?

02 March 2016 5,973 5 View

How to differentiate between allowed and forbidden transitions in direct band gap semiconductors?

01 February 2016 356 7 View

How to solve the counter electrode dissolving problem in quantum dot sensitized solar cell?

09 October 2015 3,717 3 View

How do I solve the problem of continuous corrosion of metal sulfides counter electrode in the presence of polysulfide electrolyte?

09 October 2015 340 3 View

Did any one know the full spectrum of Ultra-high-performance lamp?

04 May 2015 8,451 5 View

How to measure Solar cell J-V curve by Potentiostat?

I need to measure the J-V curve for solar cell using Princeton Versastat 4 potentiostat. How can I connect the terminals of the potentiostat?

03 April 2015 5,591 11 View

Why is in Raman is laser of wavelength 785 nm not compatible with graphene?

the most Raman spectrometers use LASER wavelengths of 533 and 633 during characterizing Graphene. When a LASER of wavelength 785 nm is used the D & G peaks in the spectrum are greatly shifted...

03 April 2015 2,470 9 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

What is the most Operating System (OS) which can be INSTALL on Tiny hard devices like Raspberry Pi (RPi) hardware ?

I'm targeting to deploy a mesh network and manually configure MANET routing protocols. I'm preparing scenarios, architectures, and hard devices needed to do that. Are there some step-by-step...

03 March 2021 1,931 5 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 3 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View