How to measure I/V on a polymer thin film solar cell?

I have prepared polymer solar cell on a ITO coated glass with the area of around 1 inch2. I am using four probe set up with sun simulator. The problem is when I am applying probes to the top...

10 November 2017 2,836 5 View

Is there any chemical etching agent which etch Silicon but do not react with Aluminum or ITO ?

I am working on Si thin film solar cells and to expose back electrode, I need to etch some Silicon out of it. Some silicon is also deposited on the sides of glass substrate which also needed to be...

10 November 2017 1,023 3 View

What could be the possible reasons responsible for poor fill factor in Si thin film solar cells?

I am working on Si thin film solar cells. I got voc of near 500 mV and Isc of about 25 mA/cm2 but with the fill factor of about 19 % only. Aluminum was base electrode and TCO was the front...

10 November 2017 1,253 13 View

If we have a p-i-n structured silicon solar cell with the thickness of about 40 micron, then can we call it thin film or bulk?

08 September 2017 5,410 8 View

Can anyone tell me how to analyze kikuchi lines obtained from TEM of thin film samples

I did TEM of thin film of Si on a glass substrate. The SAED pattern of the same has kikuchi lines. The study was done in simple diffraction mode without tilting sample. Please help me study...

07 August 2017 3,456 3 View

How to see dislocations in HRTEM image??

04 May 2017 186 5 View

Does any theory available to explain halting of grain growth in nanocrystalline thin film while sintering after a minimal growth?

03 April 2017 9,514 4 View

Can we calculate EQE/IQE theoretically from Jsc measured experimentally?

I have got Jsc of 11.6 uA/cm2 and wanted to determine Quantum Efficiency of the solar cell.

11 December 2016 9,370 3 View

Is annealing necessary in case of silicon thin film solar cells before I/V characteriation?

I have sprayed silicon solar cells (p-i-n) on a glass substrate. The sprayed films are not stable and can be removed easily by touching it. I think I need to go for annealing of the films but I...

04 May 2016 4,815 8 View

How do I calculate effect of instrumental, shape and strain effect on FWHM to calculate crystallite size?

11 December 2015 5,690 2 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 View

What techniques can I use to determine the miscibility of polymer blends?

The term miscibility refers to the single-phase state in thermodynamics. I do not mean the compatibility of different components. To determine the miscibility I know several techniques such as...

03 March 2021 4,107 4 View

Can polymer concentrations be calculated based on the number average molecular weight?

Hello, I spin-cast two different polymers onto wafers and measure their height as a function of initial concentration. For polymer A, I have the weight-average molecular weight (Mw) as well as...

28 February 2021 7,882 2 View

Distribution of particles in metal matrix?

How would define the "good" and "poor" distribution of particles within the matrix. Is there a quantitative solution to assess the distribution of the particles, which then having denotation of...

28 February 2021 7,397 8 View

What is the density for pva electrospining?

I'm Juan Carlos, a high school student who is working with electropinning, I made an electropinning machine with a 21g needle and a 30kv high voltage source and the distance between my needle is...

28 February 2021 298 3 View

What could be reason for getting such type of graph for complex impedance in case of polymer blend films?

Its effect appears in real part of ac conductivity also. Can anyone suggest any reason behind it?

26 February 2021 3,487 3 View

No title

I am trying to find how to know the density needed for a pva electrospinning in a 0.6mm neddle, the electrospinning will be from top to bottom and the problem I really have is the solution because...

25 February 2021 2,615 3 View

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

24 February 2021 2,362 5 View