Asmat Ullah

9 Questions 2 Answers 0 Followers

Questions related from Asmat Ullah

UPS analysis for Perovskite absorber layer?

I seek help for perovskite UPS analysis for the Valence band and work function calculation. The sample preparation and if there are any critical things? I have characterized my perovskite layer...

02 February 2022 4,906 3 View

Low Jsc and FF problem in inverted perovskite solar cell device?

My device architecture is (ITO/NiOx/CsFAMA/PCBM/Ag). I have attached the dark and under illumination JV curves. I have prepared the devices several times. the average Jsc

25 March 2020 871 6 View

Band alignment study for perovskite solar cell?

I am using PEDOT:PSS as Hole transport material in perovskite solar cell, is there any method (any easy software or some theoretical means) by which I can find the expected change in the band gap...

14 August 2019 2,405 3 View

About perovskite solar cells, which is more suitable architecture normal planer (NIP) or inverted (PIN)?

what is the motivation of inverted PIN structure over planner NIP structure in terms of efficiency, stability, low temperature and cost etc? Which is more suitable to make tandem with Silicon...

30 July 2019 1,271 3 View

What is the difference between d33 value measured by d33 meter and impedance analyzer?

can anyone please provide any reading material about the working principle of d33 meter and impedance analyzer? Thank You !

08 April 2018 8,356 0 View

Why does Mg doping concentration cause increase in XRD peak intensity of ferrites and chromites when compared with undoped sample?

intensities of peaks (111) (400) (422) (511) significantly increases with increasing the Mg doping concentration, why is so? any refrence to study please?

29 May 2015 7,758 4 View

How does AC conductivity of CeO2 nanostructures increase with increasing Mg doping concentration levels? Can anybody please answer with references?

We have undoped, 1,2 ,3,4 and 5% Mg doped Ceria nanostructures. in its dielectric results (using LCR meter), the AC conductivity is nearly constant at low frequencies and then increases above a...

01 January 1970 1,202 1 View

How does Reactive Oxygen Species (ROS) increases with increase in electrical conductivity?

we have prepared Mg doped ceria nanostructures, and characterized by LCR meter for electrical conductivity, at low frequencies the electric conductivity is almost same for all Mg dopant levels but...

01 January 1970 6,537 4 View

Why we want to study time-dependent ferroelectric transition?

Which material system has the possibility to have this phenomenon? (Do we have this phenomenon in BaTiO3?) What is the possible explanation?

01 January 1970 6,186 3 View