Mustafa Ünal

Mustafa Ünal
Middle East Technical University | METU · Department of Micro and Nanotechnology

PhD Candidate

About

20
Publications
9,382
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
29
Citations
Additional affiliations
April 2017 - present
Middle East Technical University
Position
  • Research Assistant
Description
  • Conducting research at Crystal Growth Laboratory on CdZnTe crystals. Also coordinatior of this laboratory.
May 2014 - March 2017
Middle East Technical University
Position
  • Researcher
Description
  • Conducted aluminum induced texturing studies on soda-lime glass substrates for thin film solar cell applications.
Education
September 2017 - December 2021
Middle East Technical University
Field of study
  • Micro and Nanotechnology

Publications

Publications (20)
Article
In this study, aluminum induced texturing (AIT) technique is used to increase light absorption in thin film by way of increasing the portion of the diffuse transmitted light (haze). For this purpose, various AIT process parameters such as starting aluminum thicknesses, annealing temperature and time, etching time, etchant's concentrations, and temp...
Article
CdZnTe crystals are the perfect candidate to be used in room temperature x-ray and gamma-ray detection systems. Production of detector-grade crystals, on the other hand, is challenging due to the unique properties of the CdZnTe. CdZnTe crystals are soft-brittle materials and have high ionicity of bonds that makes the growth process challenging. Amo...
Article
Growth of CdZnTe crystals by Travelling Heater Method (THM) is widely investigated by different groups. Interface shape and stability are critical parameters for the successful growth of high-quality CZT crystals. Even though interface stability could be achieved for a significant portion of the CZT ingot, the situation towards the end of the growt...
Article
Due to the requirement for superheating above the melting point in the homogenization process of CdZnTe material, complete seed melting remains as a significant problem for the seeded vertical gradient freeze (VGF) growth of CdZnTe. In addition, due to the typical low single crystal yields in VGF growth of CdZnTe, obtaining single crystal seed mate...
Article
We present a discrete implementation of generalized Harvey-Shack scalar scattering theory to calculate angular intensity distributions from height profiles of select randomly textured surfaces proposed for use in solar cells and covering a wide range of surface characteristics. We compare these calculations to high-resolution angular intensity dist...
Article
Aluminum induced texturing (AIT) is a promising surface conditioning method applied on glass substrates. In conventional AIT process, the reaction products (i.e., Al2O3 and Si) are stripped off the glass surface using an HF-based solution, rendering the process sensitive to etch duration. In this study, an alternative, HF-free chemistry is compared...
Conference Paper
Cadmium Zinc Telluride (Cd1−xZnxTe) has become a crucial material for X-ray and gamma ray detection due to its wide band-gap, high atomic number and high density, which offer high efficiency and sharp spectroscopic resolution at room temperature. In addition, due to being lattice matched, it can also be used as substrate for the epitaxial growth of...
Article
Aluminum induced texturing (AIT) is an effective method to enhance light trapping in thin film solar cells through texturing the surface of the glass substrate. The topography of the textured glass is closely related to the processes that occur at the Al/glass interface during thermal annealing, which is commonly carried out at temperatures above 5...
Article
The aluminum induced texturing method offers an effective light trapping scheme by random texture that is formed by U-shaped craters on the glass surface. The texture is mainly shaped by the reaction between Al and SiO2. However, the reaction mechanism is not totally understood. Besides, the influence of other components present in the glass such a...
Thesis
It is essential to employ an effective light trapping scheme to decrease the cost of produced solar electricity further in thin film solar cell technologies. There are several methods that can be used for light trapping and aluminum induced texturing (AIT) is one of them. The aim of this thesis study is to obtain highly effective light trapping int...
Article
Aluminum induced texturing (AIT) is one of the most promising texturing methods, which can be applied on glass substrates for solar cell applications. Combination of different dimensional structures exhibits the opportunity to achieve enhanced light trapping schemes. Here in this study, float glass and macro textured sandy and prism glasses went th...
Article
Full-text available
Light trapping is essential for thin film solar cells to decrease the solar electricity cost. Aluminum induced texturing (AIT) is an alternative and effective method for light trapping. Various parameters effects the final surface morphology in AIT. However, surface morphology obtained by AIT method on glass is mostly formed in annealing process wh...
Conference Paper
Texturing of glass substrate is an alternative novel method for light trapping, which to enhance the absorbed light by way of increasing the diffused transmittance (haze) so that the amount of absorbed light will be increased instead of texturing transparent conductive oxide (TCO). In this study, aluminum induced texturing (AIT) technique is used t...
Poster
Different glasses were used in this study. These glasses have different composition and they were compared according to their surface texture formed by aluminum induced texturing process

Questions

Questions (3)
Question
I am looking for a inventory management software. Unlike Quartz and others, I need the software to be capable of reading barcodes and QR codes and removing that item from the inventory or upgrade the status. I would like it to be operating on mobile OS while data can be accessed from Windows PC. In addition, it should be free.
Do you have any suggestion?
Question
According to Ellingham diagram, Ca is more oxidizable than Al but at 600 oC, can we make 3CaO + 2Al --> Al2O3 + 3Ca reaction happen?
Question
I have rough surfaces as seen in image. This image belongs to aluminum induced textured glass surface. I want to know how can I calculate average crater size in this image.

Network

Cited By

Projects

Projects (2)
Archived project
The goal of the project is that development of textured glasses by aluminum induced texturing (AIT) technique for solar cell applications.