Why the active layer film becomes bad when I spin-coat a solution on it?

Dear colleague, I try to make opv device using PTB7:PC70BM active layer. The solvent/additive of this active solution are Chlorobenzene and DIO. When I try to spin-coat a phosphomolybdic acid...

02 March 2019 6,136 8 View

How to decrease Rs value of Dye-sensitized Solar Cell (DSSC) device?

I have prepared TiO2/MnO2 working electrode for DSSC device. The result shows poor performance (efficiency and FF). I think, the problem is Rs value unstable (too high). How to decrease Rs value...

03 April 2016 4,055 1 View

Which is the best equivalen circuit to determine Rct value of counter electrode in DSSC device?

I determined Rct value of DSSC from Nyquist plot using Echem Analyst (Gamry product). I used some models to determine Rct value, however the results show different values. Which is the best...

03 April 2016 9,719 3 View

How many characterization should I do to characterize counter electrode for DSSC application?

I am researching counter electrodes for DSSC application. How many characterization must I do? If I have characterized using EIS, must I characterize using cyclic voltametry?

11 December 2015 7,660 1 View

Which is the best carbon material for counter electrode in Dye Sensitized Solar Cell?

I have researched counter electrode for DSSC application for several months, which is the best carbon material for counter electrode in DSSC?

10 November 2015 1,847 5 View

How do I characterize materials using EIS Spectroscopy?

I'm researching carbon materials for counter electrodes application in DSSC . I read several articles related to my research topic. In the articles, authors said they used EIS spectroscopy for...

10 November 2015 4,046 4 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

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

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

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 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