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Questions related from Shamjid Palappra
I would like to get some references to compare solar energy (photovoltaics) to other renewable energy resources.
05 May 2018 3,873 3 View
Need explanation regarding the basic formula and mathematical expression of EQE in term of short-circuit current (Jsc)
05 May 2018 8,042 6 View
In plasmonic solar cells, absorption enhancement is mainly related to its active layer thickness. A thin active layer with metal nanoparticles (NPs) provides an efficient absorption...
10 October 2017 7,936 3 View
Can anyone suggest some technique to find out FF enhancement of an organic solar cell embedded with metal nanoparticles compared to the solar cell without nanoparticles?
05 May 2016 3,716 3 View
I wrote a Matlab program to extract solar cell parameters (Rs, Rsh and n) from a single I-V curve using a simple diode model utilizing Lambert W equation [See the reference below]. I have found...
04 April 2016 3,600 10 View
For the fabrication of organic solar cell with Ag nanoparticles, how can I effectively spin coat Ag NPs on top of ITO substrate. I have synthesized Ag NP and washed and stored into ethanol.
03 March 2016 6,164 2 View
If we make thin films by spin coating method, even we kept same RPM and Time for rotation, the thickness of both will be different. Then how can we compare absorption enhancement the thin film...
02 February 2016 6,358 2 View
To produce efficient charge extraction in solar cell devices, the potential barrier at the active layer/electrode junction should be minimized by creating an ohmic contacts at the junction. This...
12 December 2015 1,338 4 View
In the case of silver nanocubes intense XRD peak is the (200). This intense peak is explained due to the presence of {100} facet. How these are...
10 October 2015 686 2 View
We take absorption spectra from a spectrophotometer. After normalize the data, can we call it normalized extinction (a.u)?
09 September 2015 8,715 1 View
What is the relation between absorbance and extinction coefficient?
09 September 2015 3,902 4 View
I am try to study Mie theory to understand optical behavior of metal nano particles (spherical). I have to develop a computer program based on Mie theory to theoretically understand optical...
08 August 2015 8,856 10 View
I'm expecting some good references to get the concept of reciprocal lattice. How is it useful in the studies of crystal.
03 March 2015 4,394 5 View
Plasmonics is the collective oscillations of electrons in the metal nanostructures. These collective oscillation produces a high intense oscillating electric field near the surface of metal...
03 March 2015 2,874 3 View
Actually I know this effect, but I dont know how to explain in proper way with basic physics. Another problem is how to compare this metal nanoparticle effect in bulk metal.
03 March 2015 6,107 3 View
The I-V characteristics of solar cell show a negative short circuit current. Is this negative value because of minority charge carriers or not. Is it possible to explain the working of solar cell...
09 September 2014 2,519 15 View
I would like to know why diffraction is limited by nano-world. I have read that plasmons can be used to overcome this diffraction limit in the nanometer world. I'm hoping some answers and some...
08 August 2014 3,348 5 View
Actually, I'm expecting answer to perform a computational program and its code related concept.
08 August 2014 6,188 4 View
I have read as surface roughness of PEDOT:PSS increases, solar cell efficiency will increase due to increase the rate of hole collection; how it is possible. In some journals it is explained with...
08 August 2014 6,401 1 View
I would like to know it is possible to find out thin film thickness from the reflectance pattern that have been taken from the UV-Vis spectrophotometer. I have read FFT numerical technique is...
08 August 2014 2,687 9 View
A material(A) that absorbs light at higher wavelength and other(B) absorbs at lower wavelength of light. Absorption peak of A is higher than that of B. Is it possible to compare both materials?
08 August 2014 3,883 6 View
I had treated ITO with oxygen plasma treatment, but even though PEDOT:PSS solution did not coat on the surface of ITO substrate.
07 July 2014 8,605 1 View
I am expecting answer more specifically about why nano-structure is required for organic solar cell
07 July 2014 8,229 5 View
In bilayer organic solar cell there has large contact between thin films of two organic material, then why the interface region is less than that of Bulk Heterojunction solar cell and other...
07 July 2014 7,801 11 View
I have downloaded the Lumerical software but I couldn't study it without any help. Could someone please help me in this context?
07 July 2014 6,111 10 View
I would like to get a chemical synthesis method of Copper NPs from copper chloride.
06 June 2014 3,782 2 View
I have understood, incident light waves generate a collective oscillations of free electrons in a metal nano-particles(NPs) that causes optical electromagnetic oscillation, which is called...
06 June 2014 3,767 5 View
I would like to get an answer in relation to exciton quenching in organic solar cells. The reference: http://pubs.rsc.org/en/Content/ArticleLanding/2011/JM/C1JM12820E#!divAbstract
06 June 2014 9,754 7 View
Without using a UV spectrum, is it possible to calculate the absorption wavelength of a nanoparticle if its diameter is known.
06 June 2014 2,391 6 View
I have to know the physics that related to the nano-structured organic solar cells, the fundamentals of this topic. If anyone experienced excellent e-book or paper related to this, nano-structured...
05 May 2014 3,313 3 View
I would like to understand the phenomena of plasmonic effect in terms of physics. Can anyone help me in this context?
05 May 2014 8,743 4 View
I have actually been looking for plasmonic effect in thin film solar cells, like Silver Nanoparticles for High-Performance Polymer Solar Cells.
05 May 2014 2,876 1 View
I would like to get the physical meaning of exciton quenching in solar cells.
05 May 2014 4,210 3 View
In organic solar cells, the excitons generation by the incident photon is dissociated at the donar-aceptor junction. So the dissociated electrons move to cathode (Al) and holes to anode (ITO)....
05 May 2014 3,951 7 View
LBG materials are usually used in organic solar cells as an active layer to absorb broad sun spectrum. Can anyone give its physics?
05 May 2014 1,135 2 View
I have searched so many books and websites to get the physics or concept related to excitons, but I failed to get the real concept about it rather I got some some definition like electron-hole...
05 May 2014 8,463 14 View
In organic solar cells, surface plasmons are used to improve light absorption without reducing the active layer thickness. But I didn't get the physics of plasmonic generation and how it enhances...
05 May 2014 5,978 17 View
How is exciton recombination possible in organic semiconductor?
05 May 2014 1,400 7 View
I have a 100 ohm resistor, which was connected to a I-V measurement unit. I then swept voltage from 0 -7 V, but the graph showed a current from 0-0.01 A corresponding to 0-1 V . Why it does not...
05 May 2014 4,414 7 View
To make patterns of ITO over glass plate I need to etch ITO in some portions. I have known the etching solution is aqua-regia and I have also performed the desired pattern by using this solution....
04 April 2014 1,538 2 View
I had used an AAO template for the formation of the organic-semiconductor nano-wires by filling the pores of AAO with the molten state semiconductor material. After the formation of...
03 March 2014 8,657 9 View
I have prepared nanowires of an organic semiconductor by using porous alumina as a template by melting the material at it's melting point. Nanowires were formed, however most of the wires were...
03 March 2014 8,302 0 View
I have read that the theory is mainly related to the surface energy and that as the temperature is increased, the surface energy decreases which results in a lot less nucleation sites and thus it...
03 March 2014 7,642 0 View
I need to know any theoretical model that is available for thin film deposition by thermal evaporation.
03 March 2014 8,239 4 View
I have prepared a sample with CuPc thin film and try to form its nanowires using AAO porous template by the template filling method under its melting point. So I need to wash now the AAO template,...
03 March 2014 3,731 1 View
Nano-wire or Nano-pillars synthesis using AAO (anode disk) template.
02 February 2014 2,579 7 View
I had tried to generate nano-pillars using AAO template, but I couldn't grow nano-pillars with perfect order. Rather, slanted nano-pillars were only formed. So please help me about the placement...
02 February 2014 8,375 7 View
The thermal evaporation technique is used for coating CuPc on a glass substrate or Au. We can grow nano-fibers on the substrate at higher temperature. What is the physics behind this self assembly...
02 February 2014 5,197 2 View
I need to etch CuPc thin film after forming the CuPc nano-fiber. Which one is the suitable reagent for that purpose.Can someone suggest some articles related to this topic?
02 February 2014 1,145 1 View
Actually with SEM image by contrast we can analyse which is out-of-plane nano-wire & which is in-plane nano-wire. Can we have any other techniques rather than image technique like SEM to conform it.
02 February 2014 7,874 10 View
I need to understand the concept of electrical bistability.
02 February 2014 7,135 6 View
There are so-many organic semiconductors, can we grow them as nano-fibers for Photovoltaics application; if yes, what are the methods?
02 February 2014 3,291 4 View
I need to get clear idea about data writing into (reading from) a digital memory. Actually I had tried to study organic memory devices, in order to understand that I want to get more clear idea...
02 February 2014 4,866 2 View
