What is the significance of 'dark spectral response'?

Can anyone explain me the significance of ''dark spectral response'' or " Dark EQE" of solar cell and how it will help to improve the efficiency of solar cell?

03 April 2019 7,950 7 View

How can I create periodic texture on flexible substructures like polyimide (PI), PET?

I would like to create periodic texture structure on flexible substrates like Polyimide (PI), polyethylene terephthalate (PET) for multiple reflections of light. Can anyone suggest, how can I...

02 March 2015 6,933 6 View

In a-Si:H, are dandling bond defects present in thermal equilibrium conditions in the material identical to DB defects formed by optical degradation?

See above

07 August 2014 9,510 3 View

Can someone tell me how to etch polyimide substrate (Kapton) and will it dissolve in any solution?

I have this amorphous silicon, a-Si:H, film I want etch it from polyimide and I want to know how to approach it.

06 July 2014 3,791 7 View

What is the exact difference between photoelectric effect and photovoltaic effect?

In both cases electrons are ejected from the outer shell. Can anyone give me a clear explanation of the differences between the two?

03 April 2014 6,337 10 View

Why defect density of states have Gaussian distribution in a-Si:H?

In hydrogenated amorphous silicon why density of defect states following Gaussian distribution function and band tails are exponential distribution?

03 April 2014 9,869 5 View

How does silane flow rate depend on the thickness of the sample?

I have deposited a-Si:H films by PECVD, as increasing the silane flow rate (SFR) & process pressure(PP), the thickness of sample decreases upto certain SFR& PP, again thickness increased as...

02 March 2014 1,832 0 View

Why are band tails exponential nature in amorphous materials?

In crystalline materials the conduction band (C.B) and valence band (V.B) are parabolic nature and has a sharp mobility edges. In amorphous case the sharp edge disappears because of defects but it...

02 March 2014 5,549 7 View

How does current density vary with respect to i-layer thickness?

I have read one journal where it states that with the thickness of the i-layer (0.5, 0.8,1, 2, 2.5 microns), the current density initially increases up to 1 micron and gets saturated. What is the...

31 December 2013 3,429 4 View

Up to which temperature can we continue to anneal?

31 December 2013 3,715 6 View

Why does blocking with my immunogenic peptide cause nuclear fluorescence in ICC?

Hi all, I am validating a polyclonal antibody raised against human ANT4, through WB and ICC. In most of my controls, the antibody shows very little off-target binding, but when I pre-incubate the...

03 March 2021 5,999 3 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'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

Irradiation data for JAPAN?

Hi, Could you help me to get the latest (2019, 2020) solar resource data for a particular site in JAPAN? PV GIS and NSRDB data are not in reach to JAPAN, I'm looking for some other database for...

03 March 2021 961 3 View

I need to image mesoporous silica nanoparticles that are in ~100 nm size and do high resolution TEM to look at mesopores. what grids should I use?

Need to image mesoporous silica nanoparticles using the TEM. Also, need high resolution TEM images to see the mesoporous structure. Kindly suggest what kind of grids to use. Thanks, Shatadru

02 March 2021 1,787 2 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 3 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

Why Austenite grains in steel show much more twinning than ferrite grains?

It is oftentimes said to be a distinctive metallographic trait that differentiates a fully austenitic and a fully felly ferritic steel without etching that might distinguish between two. Why...

02 March 2021 728 2 View

Does Napabucasin soluble in dichloromethane and in ethanol?

I need to prepare a solution of Napabucasin (inhibitor of cancer cell stemness) in dichloromethane. The drug is expensive, so maybe somebody already tried to do it. If it is soluble, what is the...

02 March 2021 9,945 3 View