Khursheed Ahmad

14 Questions 19 Answers 0 Followers

Questions related from Khursheed Ahmad

Why XRD peak absent in MA3Sb2I9 prepared by two step method compare to the MA3Sb2I9 prepared by one step method?

Hello All Researchers, I have prepared MA3Sb2I9 perovskite film on FTO employing two different approach. The XRD was same except absence of one peak in the MA3Sb2I9 prepared by two step method....

01 January 2020 2,351 2 View

How to find out the leakage current density and trap state densities for perovskite solar cells?

Hi All, I have developed Pb free perovskite solar cells and the performance was checked by measuring J-V analysis under i sun conditions. I want to calculate the eakage current density and trap...

10 October 2018 405 0 View

Why peak current Vs square root of scan rate is not linear?

Dear Researchers/Scientists, I have recorded the CVs at different scan rate (100-1000 mV) and plotted the graphs for Peak current Vs square root of scan rate. I have found it non linear. Why it...

09 September 2018 9,681 5 View

How to confirm the formation of new perovskite?

Dear Researchers, I have prepared new lead free perovskite but thier crystal structure is not reported. I have tried but I did not get the crystal too. I have recorded the powder XRD. Please...

06 June 2018 232 3 View

How to calculate the Recombination resistance using Nyquist plot?

Hi Respected Scientist/Researchers, I have done the EIS analysis for the perovskite solar cell device having MA3Bi2I9 as light absorber. I need to calculate the recombination resistance and...

05 May 2018 9,602 1 View

Why the XRD patterns powder form and thin film of Organic-inorganic hybrid perovskites is different?

Hi All, I have prepared the CH3NH3PbI3 perovskite powder and CH3NH3PbI3 film. The powder and Thin films shows two different pattern which are consistent with reported literature. However, i need...

04 April 2018 4,068 7 View

How to calculate Adsorption capacity for dye removal?

I have recorded UV-vis spectra for dye adsorption using metal oxide. Dye concentration= 200mg/L Adsorbent= 25mg The absorption peak was observed at 3.3 (intensity;a.u.) and it was absorbed with...

04 April 2017 2,504 1 View

How to calculate electrochemical active surface area for glassy carbon electrode?

I have done cyclic voltammetry analysis for methanol oxidation using graphene/SrZrO3 composite and it shows excellent oxidation current as compared to the pristine graphene or srzro3. Now i need...

02 February 2017 7,468 6 View

How to measure charge discharge study in mehtrohm potentiostate using Nova software?

I have performed GCD for supercapacitor but not getting proper curve, something is wrong. I have attached the recorded file. Please help to what parameters I have to set and how to set.

01 January 2017 6,831 6 View

Can MnO2 be used as electron transport layer in perovskite solar cells?

Generally, TiO2 or ZnO etc. have been employed as efficient electron transport layer since they have band gap around 3.2eV. MnO2 have a band gap of 2.4eV, can it be used as mesoporous layer in...

08 August 2016 1,993 11 View

How to find out accuracy and precision for modified glassy carbon electrode using cyclic voltammetry?

I have recorded the cyclic voltammogramms for both modified and bare electrode. The study has been performed considering different parameters like effect of pH, concentration and scan rate. The...

06 June 2016 3,157 4 View

How to calculate HOMO and LUMO???

I have synthesized SrZrO3 oxide perovskite and the band gap was calculated 5.8eV. Please suggest me how to calculate HOMO and LUMO values???

04 April 2016 3,588 5 View

Can anybody suggest me free software for EIS fitting and link ?

I need to fit the EIS data, kindly suggest me a good software or the same.

03 March 2016 5,375 6 View

Organo metal halide perovskite are the best to date in photovoltaic devices, but why could oxide perovskites not in the same manner?e.g. CaTiO3?

solar cells

01 January 2015 3,036 1 View