Have thermal velocities electron and hole in semiconductors constant?

hi have thermal velocities electron and hole in semiconductors constant? What are they calculated? thanks

01 February 2019 3,177 3 View

What is the condition of plasma formation for titanium dioxide?

hi What is the pressure of plasma for the Titanium Dioxide layer under RF Sputtering?

31 December 2018 8,187 3 View

Do the following things change and how much?

hi, pleased guide me if i change thickness of different layer perovskite solar cells , or Physical conditions of making layers such as Change in pressure,Change in temperature sunstrate,...

10 November 2018 574 4 View

I made a thin layer of titanium dioxide in the lab. What methods can now be used?

Hi, I made a thin layer Tio2 in the lab. what methods can now be used to to determine lifetime of the carriers ( e and h ) , their mobility , and the concentration of the carriers ( NA , ND)? thanks

10 November 2018 1,223 4 View

What is stack of HAADF STEM cross section image?

what is stack of HAADF STEM cross section image?

10 November 2018 732 0 View

How should be simulated layers with comsol software?

Hi, I want to use comsol software to simulate provskite solar cells, I dont know what kind of information is needed to simulate different layers and finally extract the best power converting...

10 November 2018 3,587 1 View

Can anyone tell me how to clean ITO coated glass for sputtring magnetron deposition?

Dear colleague Can anyone tell me how to clean ITO coated glass for sputtring magnetron deposition?

09 October 2018 1,765 0 View

Does anyone have this book?

Dear partners Does anyone have this book? quantum theory of the optical and electronic properties of semiconductors 5th edition , hartmut huang and stephan w koch thanks

08 September 2018 9,546 0 View

What is the best conditions for the titanium dioxide present at the temperatures of the RF sputtering?

hi, Please advise. What is the best conditions for the titanium dioxide coating at what temperatures and under what physical conditions (pressure, ...) is the RF sputtering method? sincerely yours

07 August 2018 5,118 1 View

What is the use of Comsol software in Provskite Solar Cells?

Advise you. Has anyone simulated Provskite solar cell with Comsol software? What basic information is better to enter in this software? The thickness of the layer?, the temperature substrate?,...

06 July 2018 9,843 3 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

What are the application of Fixed points thoery in Chemistry.?

It is said that fixed point theory has lot of applications not in the field of mathematics only but also in various areas. So I am looking for applications in Chemistry only..

26 February 2021 3,533 1 View

Can I ask did any good platform or journals for learning the calcluation on the reference governors and command governor?

Recently I face some problems with the mathematical ( calculation) on the reference governor and command governor, so I need some help from you all to get which platform or journal can let me...

23 February 2021 7,746 2 View

Special issue on PLS-SEM in Mathematics. Are you interested?

21 February 2021 5,601 3 View

What is the better software for approximation of 3D surface with equations?

I have a massive of x, y, z coordinates of 2D surface in 3D space, which builded in Ansys HFSS or AutoCAD. How can I get the analitical aproximation of this surface by formulas?

21 February 2021 3,444 7 View

How can I obtain a sine function along a path with known equation?

I have a symmetric airfoil with known equation. Now a sine function passes along the airfoil equation like following figure. I want to find the sine function in (x,y) coordinate system.

17 February 2021 1,594 12 View

Does learning mathematics exclusively improve cognitive abilities?

Teaching Mathematics at school to all students is commonly justified by the opinion that it improves their problem-solving skills and "makes them smarter" (whichever measure is implied by this). I...

15 February 2021 7,391 7 View

Possible problem for showing 0.2 sun intensity instead of 1 sun intensity in AAA class Newport solar simulator?

We have a AAA class Newport solar simulator. We changed the Xenon Arc Lamp recently (XBO450W, Make:OSRAM) as the lifetime got over. However, the intensity is coming to be only 0.2 sun instead of 1...

14 February 2021 9,998 3 View

Can we help fellow mathematicians get free ?

https://terrytao.wordpress.com/2021/02/08/a-statement-from-mathematics-department-faculty-at-stanford-and-mit/ Terry Tao blogged about this unfortunate event. Kindly share among Mathematical...

08 February 2021 1,055 3 View

Theoretical computer virology ? is still alive ?

HI Everyone! I am asking to know by you, expert in cybersecurity and mathematics, if Computer virology (the one of Cohen and Andler) is still an active field of research. That research made in...

08 February 2021 7,613 6 View