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...

07 August 2017 7,300 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...

05 June 2017 4,543 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...

31 December 2015 7,002 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...

11 December 2015 3,787 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...

09 October 2015 2,602 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?

09 October 2015 4,278 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...

07 August 2015 5,374 8 View

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

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

04 May 2015 7,248 2 View

1 nm thick MgO thin-film to be deposited on Si wafer using thermal evaporation. What will be the optimum deposition conditions?

Favourable conditions of base pressure, rate of deposition. Also, by which characterisation technique to be used to verify the thickness of the deposited film.

28 February 2021 3,640 3 View

RIA. How to measure?

When you use RIA, with a control the unknown sample with antibodies, you bare in mind the binding sites of the antibodies. However you still need to measure labelled antigen (radioactive) and not...

28 February 2021 2,133 3 View

How to Eliminate cosine error and abbe error in LASER measurement system(for example Rhenishaw XL80)?

I like to do project in laser measurement system. My objective is to eliminate or reduce the cosine error, abbe error in Laser measurement system. I have Rhenishaw XL80 system. Please tell the...

28 February 2021 4,890 3 View

How to compare 2 samples recruited with different sampling methods?

If I want to compare characteristics of 2 groups of patients, one group is recruited from a random sample of the general public while another group is from a sample with a fixed gender (male to...

26 February 2021 3,526 3 View

Gas sensor response and recovery time independant of flow rate and chamber volume?

I am trying to obtain the response and recovery times for my gas sensor device. It appears the the response/recovery times are primarily dependant on the flow rate of the gas I inject into the...

26 February 2021 1,511 3 View

How to measure angle between laser travel path and machine axis in Laser Measurement system?

25 February 2021 1,987 3 View

Do you consider undergoing a structure literature review / Meta analysis and getting numerical findings sort of quantitative method?

I am looking for a classification of the research methods included in literature review papers or Meta analysis ones .

22 February 2021 1,131 4 View

Amorphous silica XRD peak at around 10 degree?

21 February 2021 3,417 5 View

Could the "incoming radiation (net radiation)" values be negative?

Could the "incoming solar radiation" values be negative? What is the difference between "global solar radiation" and "incoming solar radiation"? Which one might be measured negative values?

21 February 2021 7,726 9 View

Can I do two kinds of mixed method in explanatory research?

Dear distinguish professors and scholars, I have a research in measuring two kinds: think tank capacity and research impact on policy. Can I do two kinds of mixed methods in order to find, "Is...

20 February 2021 6,897 1 View