Ali Bahrami

9 Questions 5 Answers 0 Followers

Questions related from Ali Bahrami

Constant generation rate assumption in organic solar cells

I have seen in some papers and theses (link 1 is an example) that a constant generation rate is assumed for solving drift-diffusion equations. My questions are, why this assumption is valid?Is...

08 August 2017 7,360 1 View

Are there any advantages to carrier lifetime measurement using reverse recovery method compared to OCVD method?

06 June 2017 9,502 1 View

Non ideal transient response in reverse recovery method

I have used reverse recovery method for measurement of carrier lifetime. I have used a simple setup consisting of a function generator, a resistance and DUT (design under test). In a conventional...

06 June 2017 4,638 2 View

Is there any relation between thicknesses of electron/hole transport layers and open circuit voltage in organic solar cells?

i have read this paper http://www.sciencedirect.com/science/article/pii/S1566119912000833 in the paper, increasing thickness of transport layer decreases Voc. What is the reason(s) and mechanizm...

01 January 2016 7,073 6 View

How can I extract maximum real index of refraction in Silvaco?

I have simulated real index of refraction as a function of energy for a waveguide. How can I obtain maximum real index of refraction using "extract" statement? I have examined some statements such...

12 December 2015 3,851 2 View

Why is the Jsc of tandem solar cells are typically lower than Jsc of the subcell that produces lower current?

I have read several papers about (organic) tandem solar cells, in some papers Jsc of tandem cell is almost equal to Jsc of the subcell that produces lower current and in some of papers Jsc of the...

10 October 2015 2,678 6 View

Why do inverted organic solar cells are more stable compared to normal OSCs?

I know that one reason is using high work function electrodes. Is there any other reason for better stability of inverted organic solar cells?

10 October 2015 4,336 1 View

What is the necessity of current matching between subcells in a tandem solar cell?

my first question is that what is the definition of current matching? does it mean matching between short circuit currents or currents at maximum power operation or there is another...

08 August 2015 5,444 8 View

Is it possible to set infinite surface recombination at contacts for a solar cell in Silvaco?

05 May 2015 7,313 2 View