What is the effect of impurities in the thin film?

More Fayroz A Sabah's questions See All

What is the difference between the charge transport in thin film and in nano-particles?

Dear colleagues I would like to ask about the charge transport between carriers in thin film and in nano-particles, what is the difference between them? Would you please provide me with the theory...

09 October 2017 7,428 4 View

Is Williamson-Hall method applied on powder only or can be applied on thin film also?

Williamson-Hall method

09 October 2016 1,777 35 View

What is the relation between crystalline size and the resistance during annealing thin film?

When annealing thin film at constant temperature for different times, the crystalline size (D) decreased and also the resistance (R) decreased. Both parameters lead to increase the sensitivity...

09 October 2016 2,282 14 View

What will happen when increase the concentration of S in the CuS thin film?

We have CuS thin film with (Cu:S) molar ratio (1:1), and we got nanoplates and very distinct and clear particles on the surface. But when increase S concentration (1:2) and (1:3) for (0.1 M, 0.2 M...

01 January 1970 9,130 15 View

Which is higher surface-to-volume ratio, nanoplates or nanorods?

Dear Researchers, Merry Christmas & Happy New Year I would like to ask about the surface-to-volume ratio of nanoplates and nanorods, which one is higher? Regards Fayroz A.Sabah

01 January 1970 9,373 2 View

Can CuS absorbs CO2 laser beam?

Dear colleagues Can CuS precursors (as a solution) absorbs CO2 laser beam? Best regards Fayroz

01 January 1970 6,589 3 View

Hydrophilic of thin film

01 January 1970 8,951 8 View

What is (x) in CuxS means?

Dear colleagues Greetings CuxS has at least five stable phases with (1

01 January 1970 2,666 4 View

What is the (d spacing), obtained from XRD measurement?

Dear Colleagues Good day I would like to ask about the parameter (dhkl spacing) that we obtained from the XRD data, is it the spacing between grains or particles or atoms? And are the particle and...

01 January 1970 4,531 9 View

What is the surface site density (Ns)?

Dear colleagues Sweet greetings In pH sensor application, the sensing characteristics depend basically on the surface site density (NS), I want to know what are these sites represent? Are they the...

01 January 1970 9,769 1 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

How to prepare a thin polymer film by post-polymerization/crosslinking?

24 February 2021 2,362 5 View

Is is possible to pole with corona poling pellets of the sample material instead of thin films?

As it is highly probable that pellets will have a higher degree of air gaps and voids than thin films, is it possible to pole the samples with corona poling nevertheless? Or is there the...

24 February 2021 1,349 1 View

How to troubleshoot Electrochromic Films and Electrochromic Devices?

I am trying to characterize an electrochromic system. The system uses ITO electrodes on glass, WO3 as the electrochromic film, and NiO as the ion storage layer. When I deposit NiO and WO3 and...

23 February 2021 9,592 2 View

How to improve the adhesion between germanium and silicon monoxide thin film layers using EBEAM evaporation?

I want to deposit multilayer coating of germanium and silicon monoxide on silicon wafer using ebeam evaporation?

21 February 2021 2,141 3 View

How can I measure the thickness of thin layers deposited on textured glass susbtrates?

I want to measure the thickness of aluminum oxide and titanium oxide layers deposited on textured glass substates. The layer thicknesses are typically below 100nm.

21 February 2021 5,465 4 View

How do I calculate absorption coefficient of my thin film if I dont know the thickness? Or how can I calculate the thickness of my sample?

I have done Uv-vis characterisation of my thin film and have received absorbance and transmittance data. Now I want to calculate the absorption coefficient but I dont know the thickness of my...

21 February 2021 7,148 8 View

How to construct different filler shape in MD simulations?

Is there any way to construct different initial filler shapes like triangle, square, rectangle, pillar, and tube in any simulation software.

20 February 2021 1,750 1 View

Can fractal dimension of thin film surfaces affects the electrons energy states?

As fractal dimension of a thin film surface implies the irregularity in the surface. Is it possible that the energy states of the electrons are also affected by the fractal dimension?

19 February 2021 5,509 3 View

What is the reason film thickness increased?

what is the reason film thickness increased when increased doping concentrations give some reasons The measured film thickness is 156, 282, 394, 548 and 681 nm for 0, 1.5, 2.5, 3.5, and 4.5 wt....

17 February 2021 8,987 5 View

Mohabattul Zaman Bukhari

Dear Dr Fayroz,

Good question... For your info, in electronics industry, we added impurity to improve or to enhance the performance of the chip/devices. In another word, the increase in impurity concentrate will helps to increase the conductivity of the testing chip/devices.. Impurities do have some benefit after-all. There is one paper that I would like to share on the thin-film research. Hope this info help you in your research/study.. All the best then...

Hassan Alshamsi

Impurities are dopants which change the chemical composition of host .A suitable impurities such as metals (Cu,Fe,Ag,Mn,Co)may be improve performances of n-type semiconductors due to decrease in band gap energy (Fermi level shifts inside conduction band )and electrons transition from valance band to conduction band it requires low energy, while some other impurities may be cause an increase in band gap energy

Fayroz A Sabah

Dear Dr. Mohabattul Zaman Bukhari

Thanks a lot for your response, actually that what happened with me. I found that the impurity in thin film improve the device much more than the pure thin film.

Many thanks, I really appreciate your interest.

Fayroz

Dear Dr. Hassan Alshamsi

Thanks a lot for information, I have a p-type material (CuS) and the XRD data gave me this material peaks (CuS)+ one of its elements only (S). This happened for the first time because I changed the deposition method. And this (S) element significantly improves the thin film.

Best regards

Mouad Ahmad Tarawneh

dear

hope these links will help you

http://www.sciencedirect.com/science/article/pii/S0927024804000868

http://pubs.acs.org/doi/abs/10.1021/jp711622z

https://arxiv.org/abs/0810.0428?frbrVersion=3

http://avs.scitation.org/doi/abs/10.1116/1.568964

http://link.springer.com/article/10.1007/s11837-005-0120-3

regards

Dear Mouad Ahmad Tarawneh

Many thanks for your interest and for the links.

If I get S in the XRD data for my thin film which is always give me just CuS (with its phases), can we consider S as an impurity or not?

Alexey A. Serdobintsev

Dear Fayroz

Sulfur can't be considered as impurity because its a component of base material CuS. If XRD gives single S peak it means that you have exessive sulfur in film. And there is so much exessive sulfur that it form separate phase included in CuS film.

Dear Alexey A. Serdobintsev

Thanks a lot for your explanation. So its normal for S to appear in my film, right? I got 3 peaks of S with higher intensity than that of CuS. But the film gave me very good result as a device. I think S here is so useful to improve my film.

If I increase the ratio of S, will CuS thin film convert from p-type to n-type? or there is no relation between the (Cu & S) atoms and the p or n-type material.