Dear All, Can anyone please tell my the possible reasons for not getting diode characteristics of solar cell ?

My device structure is ITO/PEDOT:PSS/Active layer/Al. Here i am using p3ht-cnt composite as the active layer. During dark i-v measuring i am not getting the usual diode characteristics for the...

31 December 2015 6,477 6 View

How can I take the c-v characteristics of P3HT film deposited over glass substrate ?

I am interested for capacitance voltage measurement of p3ht film. I am depositing aluminium dots above the p3ht film. But when i am measuring the c-v characteristics, am not getting the data as...

04 May 2015 1,951 9 View

Which is the best solvent for dispersing RGO without functionalizing it?

There are lots of articles that describe the dispersion of RGO. But most of them are by covalent functionalization. Though it enhances dispersion but degrades the properties of the material. Hence...

06 July 2014 522 11 View

How can I coat a thin layer of PEDOT:PSS over SiO2 so that I can characterize its film thickness?

I have prepared a thin film of PEDOT:PSS over SiO2 substrate. I tried masking the substrate with teflon tape but the solution get stuck near the teflon tape and the thickness there is greater...

04 May 2014 7,826 5 View

I have prepared reduced graphene oxide using solution method. Can someone explain to me how to filter to get the required material?

Here I am using PTFE filter paper, but it is very much brittle. It can not be bent or folded. So it is being very difficult to filter. Please explain

03 April 2014 1,902 3 View

How can we measure the smoothness of thin film?

Sometimes relation between different layers (thin films) of device play an important role in device performance. So it needs to be optimized.

02 March 2014 351 7 View

Can someone please explain the meaning of 2.5 wt% dispersion in H2O?

I am interested in preparing a composite with PEDOT:PSS. But I don't understand how to maintain the ratio as I don't understand what 1.3 wt% dispersion in H2O means.

01 February 2014 2,543 3 View

How can we allign carbon nanotubes in a polymer matrix?

Polymers with CNT filler have proved themselves as important candidates in the category of polymer composites due to their good physical properties. Hence can we in some way align them in an easy...

01 February 2014 9,405 17 View

How can I prepare Graphene using the electrolysis method?

Graphene has been a material of interest since its discovery in 2004 on account of its excellent physical properties. Can someone please explain the synthesis of Graphene by electrolysis?

31 December 2013 3,828 3 View

How can we explain the zero bandgap semiconductor "graphene"?

As graphene is known to be a zero bandgap semiconductor, I understand its behaviour to be somewhat like metal as the band gap is zero and somewhat like semiconductor as the name signifies. Can...

11 December 2013 6,772 7 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 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

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

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

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'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