Christoph Wolf

8 Questions 10 Answers 0 Followers

Questions related from Christoph Wolf

Is there code available to solve a mixed ionic-electronic drift-diffusion system?

Dear all! I am currently looking for code (preferably Matlab) to solve the time-dependent drift-diffusion equations for a mixed ionic-electronic conductor with a single ionic and single electronic...

05 May 2016 7,692 2 View

Lead-halide perovskites: what is the perspective for industrialization of lead-containing products?

Dear Colleagues! This question might be a bit outside of the usual scientific questions here but I found it a rather interesting and often overlooked perspective on this "trend research" topic...

03 March 2016 5,102 1 View

What is the best instrumentation choice for measuring absorption of rough thin film samples?

Dear Colleagues! I am currently measuring the absorption of "absorbing thin films on non-absorbing substrate" type samples. The semiconductor material has a gap in the visible region and I am...

03 March 2016 7,207 6 View

Would someone be kind enough to show his or her magnetoabsorption setup?

Dear All! I recently came across the magneto-absorption technique for estimating of effective carrier mass in semiconductor materials (e.g. Hirashawa et al., Physica B 201 (1994) 427-430 [1]),...

01 January 2016 3,280 2 View

Why is the band gap calculated from Tauc plot different for UV-VIS and PDS measured absorption?

Dear Colleagues! I have a question concerning the band-gap calculated from absorption data by Tauc-plot. I obtain absorption data from photo-thermal deflection spectroscopy (PDS) and uv-visible...

10 October 2015 5,294 4 View

How do I treat the transition between excitonic absorption and the Urbach tail?

Dear colleagues! I am wondering if there is any method to properly treat the transition from absorption by gap states (Urbach tail) to excitonic or band-to-band. When modelling all contributions...

09 September 2015 8,584 1 View

How do I simulate Capacitance-Voltage (CV) characteristics of a Schottky contact using COMSOL?

Dear Colleagues, I am currently trying to validate some CV data. Therefore I would like to model the CV characteristics (capacitance at different bias levels) I am new to COMSOL but it is the only...

05 May 2015 7,975 3 View

How to easily separate Kapton from polymers?

I need to prepare a polymer-substrate for Kapton foil by spin-coating. After applying the Kapton I need to spin a layer of PMMA on the Kapton and subsequently release the Kapton from the polymer...

01 January 2014 1,330 3 View