Goutam Kumar Gupta

10 Questions 8 Answers 0 Followers

Questions related from Goutam Kumar Gupta

Do we need to to UV ozone treatment to increase adhesion of perovskite on Si/SiO2 substrate after SAM APTES treatment?

I am depositing perovskite on Si/SiO2. APTES SAM (self-assembled monolayer) treatment is reported as beneficial for perovskite. Can we do UV ozone treatment after APTES deposition? Or UV treatment...

08 September 2021 8,900 2 View

How to prevent reaction of CuSCN (as hole transport layer) with silver top electrode in perovskite solar cell?

I am depositing CuSCN on top of perovskite (FAMAPbI2) as HTL and silver as the top electrode. a silver top electrode in all my sample with CuSCN as HTL turn black within few minutes also device...

26 June 2021 3,588 4 View

Why Perovskite turns white within 12 hr while kept for spiro-OMeTAD oxidation in desiccator in ambiant atmosphere?

I prepared perovskite (FAMAPbIBrCl) on top of a compact TiO2 layer and spin-coated spiro on top of it. I kept film samples in a desiccator for the oxidation of spiro. within 12hr samples turn...

12 June 2021 2,079 5 View

Can efficiency of solar cell decrease with increase in absorber layer thickness. If absorber is p type and has high donor type defect concentration?

If absorber layer material of solar cell has donor defect concentration comparable to the acceptor hole concentration, Then what will happen to the cell efficiency with increase in absorber layer...

07 November 2017 8,830 6 View

Is there any way to find conductivity or carrier concentration of a film deposited on conductive substrate?

I have deposited a thin film on conductive ITO substrate. Now i wish to find out the conductivity of deposited thin film such that conductivity of ITO does not affect the measurement...

20 June 2017 6,754 3 View

Why Mo thin film deposited on SLG substrate using sputtering etches out in DI water. How to get good adherence to the substrate?

I deposit Mo thin film of about 1 micron thick on SLG substrate using DC magnetron sputtering. whe i use it to clean in DI water or acetone or alcohol it etches out. What is the main reason behind...

06 October 2016 3,165 5 View

Why nickel is deposited before aluminum deposition in making contact on solar cell.What is the thickness ratio for nickel and Al for good contact?

why nickel is deposited before aluminum deposition in making contact on solar cell.What is the thickness ratio for nickel and aluminum for good contact?

29 March 2016 3,333 5 View

How can I protect of ITO layer conductivity from H2S environment?

When i anneal my CZTS thin film coated over ITO substrate in H2S environmentat 550 C, the ITO reacts and its conductivity is lost. HOw we can protect ITO conductivity.

26 December 2015 9,853 7 View

What are the possible reasons for getting band gap more than 2eV of CZTS thin film?

I am trying to make CZTS thin film however its bandgap is coming more than 2eV.What are the possible reasons for this?I had annealed the film at 350C. 1.What are the possible phases that cause...

14 November 2014 9,088 6 View

I want to model CZTS solar cell in silvaco atlas. However, the material is not available in the simulator. How can I create a new material file?

How can i create new material file in silvaco atlas. Help me regarding this and suggest any reference for this.

27 October 2014 2,939 2 View