Pranjala Tiwari

9 Questions 10 Answers 0 Followers

Questions related from Pranjala Tiwari

How does the work function of an electrode affects its operating voltage window?

I am designing an asymmetric supercap for which i have selected negative and positive electrodes having highest work function contrast. I have found several articles, stating the importance of...

06 March 2020 8,277 3 View

What is the effect of charge discharge current density on the coulombic efficiency of a electric double layer electrochemical capacitor??

The coulombic efficiency of my supercapacitor device is increasing with the increase in the applied current density of charging-dicharging. Can someone please enlighten me on this trend because...

07 January 2020 7,338 4 View

How does defects in MoS2 structure affects its Photoluminescence spectra (image attached) ?

I deposited MoS2 thin films, and found that the PL spectra was centered around 605 nm, which corresponds to bandgap of 2.049 (close to that of monolayer). However, the Raman spectra of films...

10 September 2019 5,372 2 View

Can we calculate the thickness of a thin film (1-10 nm) using XPS depth profile analysis?

I have performed XPS analysis of a multilayered thin film. However, the analysis gives a relation between the sputter time and intensity of various elements. Is there any relation or approximation...

04 April 2019 7,356 14 View

Can solid electrolyte interface (SEI) formation take place on the surface of supercapacitor electrode material in aqueous Na2SO4 electrolyte?

I performed three electrode test for MoS2 electrode using aqueous Na2SO4 electroyte in stable potential range. When i performed XPS of samples cycled for 100 and 500 cycles, i observed formation...

27 December 2018 8,892 2 View

Which current and voltage values are to be taken in account for calculating percentage of capacitive and diffusion current from CV data?

I did the CV analysis of my sample (CNT-MoS2 hybrid) at small scan rates (0.1-1 mV/sec). However, my results show no peaks even at the lowest scan rates, and in order to utilize the Dunn's...

24 December 2018 3,861 3 View

How can i increase adhesion of WS2 thin films deposited by DC magnetron sputtering?

I am depositing WS2 thin films using magnetron sputtering to be used as electrode material for supercapacitive application. I have tried various substrates( Stainless steel, ITO) but failed to...

20 November 2017 4,427 3 View

Where exactly does the photon absorption takes place (p-layer, n-layer or the junction) in a solar cell and why?

I have read alot of data however its still confusing for me.

30 March 2017 3,978 8 View

Which software can i use to make theoretical calculations regarding adsorption energy and surface chemistry of interacting molecules ?

I am studying about adsorption of gases on some specific compounds. I want to analyze the surface chemistry, change in gibbs free energy behind the experimental results. Can i do such...

25 October 2016 9,804 7 View