Ankit Goyal

13 Questions 35 Answers 0 Followers

Questions related from Ankit Goyal

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...

11 November 2017 2,870 5 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...

11 November 2017 1,292 13 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...

11 November 2017 1,063 3 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?

The thickness of the intrinsic layer is about 25 micron. I would also want to know that how should I decide thickness and choice of electrode material for the aforesaid cell.

09 September 2017 5,442 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...

08 August 2017 3,498 3 View

How to see dislocations in HRTEM image??

Can we see different dislocations in a HRTEM image along with SAED patterns? How can we quantify dislocation density from TEM and XRD results? The approximate analysis will be good enough.

05 May 2017 232 5 View

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

A minimal grain growth was there in silicon thin film from 60 nm (initial) to 80 nm (in final) after sintering for 30 min. Sintering temperature was around 950 C. After this no grain growth was...

04 April 2017 9,550 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.

12 December 2016 9,404 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...

05 May 2016 4,853 8 View

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

I'm working on Si powders which is not in spherical shape.

12 December 2015 5,730 2 View

I noted reduction in grain size of Silicon thin film after sintering at 700 C compared to un-sintered Silicon powder. How is it possible? reference?

Grain size is calculated using deby-scherrer formula.

10 October 2015 1,796 6 View

Can anybody suggest a high negative refractive index material ?

Refractive index must be negative

06 June 2013 852 2 View

Can you please suggest some polymer which has high affinity to water ?

I am looking for a polymer which has excellent water absorbing phenomena and at the same time it must hate oil which means oil repellence.

05 May 2013 4,826 9 View