Helen Par

5 Questions 4 Answers 0 Followers

Questions related from Helen Par

Why does improving interfacial recombination improves VOC in solar cells?

Many literature reports on the increase in VOC when interfacial recombination is being suppressed, with little change to JSC and FF. How can we explain this strong relation between VOC and...

28 April 2019 8,264 6 View

How can oxygen be incorporated into SnS using ALD?

I have successfully deposited SnS thin films using ALD by alternating doses of a tin (ii) metal precursor gas with hydrogen sulphide gas. For some oxygen to be incorporated into the SnS material,...

15 April 2018 5,758 5 View

Single/Double Exponential Decays in Time Resolved Photoluminescence

In the time-resolved photoluminesence measurements of semiconductor materials, what causes single exponential decays and what causes double exponential decays?

14 July 2017 5,650 4 View

Difference between PL Band Edge Emission and Emission due to Free Exciton

In a PL spectrum, is it possible to detect emissions due to inter-band recombination (conduction band to valence band direct transition) and at the same time also observe PL emissions due to free...

14 July 2017 5,435 2 View

Which PL Peak to use in Time-Resolved Photoluminescence?

I am investigating an active photovoltaic material using time resolved photoluminescence measurements to find out the carrier lifetime of the material, and hence the diffusion length. There are...

14 July 2017 9,633 5 View