Why does zinc-phthalocyanine reduce Voc of the P3HT:PCBM solar cell when it is used between the PEDOT:PSS layer and the active layer?

Voc was reduced form 0.62 to 0.55. Is there any specific reason?

03 April 2015 8,735 1 View

Should I perform fluorescence measurements of organic materials rather in solution or as thin film?

In fact, I did it for both thin film and solution and I found different results with different excitation wavelength.

03 April 2014 8,547 3 View

Why do I get a drop in voltage when my current is good (and vice verse)?

This in the case of an organic solar cell and high open circuit voltage.

03 April 2014 3,656 6 View

I got 02 moderator values defining Johnson-Neyman significance regions. Is it an error?

Hi everyone, I am conducting research for my Master's thesis. I am using PROCESS by Johnson-Neyman to analyze my Moderator model. I test the relationship between Public Service Motivation and...

03 March 2021 2,350 2 View

What analysis to choose with a large neste dataset and clearly skewed or kurtotic distributions?

Hello! I have a dataset of n=3000 nested within 8 countries with approximately 200 or 400 responses in each country. I originally planned to perform multilevel modelling with 4 dependent variables...

02 March 2021 6,865 1 View

Is it necessary to report effect size (ES) in statistics of biomedical research given that we already report p values routinely?

Pls share your thoughts

01 March 2021 7,330 4 View

Can polymer concentrations be calculated based on the number average molecular weight?

Hello, I spin-cast two different polymers onto wafers and measure their height as a function of initial concentration. For polymer A, I have the weight-average molecular weight (Mw) as well as...

28 February 2021 7,882 2 View

What is the density for pva electrospining?

I'm Juan Carlos, a high school student who is working with electropinning, I made an electropinning machine with a 21g needle and a 30kv high voltage source and the distance between my needle is...

28 February 2021 298 3 View

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I am trying to find how to know the density needed for a pva electrospinning in a 0.6mm neddle, the electrospinning will be from top to bottom and the problem I really have is the solution because...

25 February 2021 2,615 3 View

How to handle studies which report perfect effect sizes in a meta-analysis using Pearson's r?

I'm in the process of updating a meta-analysis and in one of the new studies, effect sizes are reported as Tau-U. Two of the effect sizes are reported as Tau-U = 1.00. I am using Andy Field's...

24 February 2021 2,265 3 View

How to delaminate copper in water-based anodes?

Hello everyone, I'm looking for a way to delaminate copper current collector of water-based anodes in Li-ion batteries without damaging the graphite film. I tried different materials such as HNO3...

24 February 2021 3,785 3 View

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23 February 2021 4,014 3 View

How to deal with different types of logarithmic data for meta-analysis?

Hello dear researchers, 1.I want to know how can I compute pooled effect size when we have three types of logarithmic Mean&SD Type 1. Log (x) with base 10 Type 2. Ln (x) Type 3. Just...

18 February 2021 8,214 3 View