Materials Science & Engineering

TOPIC: SURFACE ENGINEERING

Join us online via Zoom to participate in the discussion of some of today’s most thrilling materials science topics. Register here. 

Presented by:   
Prof. Dr. Ir. Gertjan Koster
Full Professor of Physics of Inorganic Nanomaterials, Faculty of Science and Technology, University of Twente

Speakers:
Dr. Jahnabi Basumatary
Materials specialist, ASML Eindhoven

Emile van Loon
Technology Transfer Engineer, Bodycote Hardingscentrum B.V.

Dr. Ir. Vishwas Gadgil
Technologist, Materials and Nanotechnology, VDL ETG T&D Hengelo BV
Fellow at the Faculty of Science & Technology, University of Twente

Abstract: 
Functionality of a material is its interaction with the environment and intended application. Mechanical properties are a function of the bulk of the material. In many cases the surface properties required are different from the required bulk properties. In such instances the surface has to be engineered to fulfill the required function.

This colloquium will address surface modification in general. Firstly, surface characterization techniques will be outlined. In addition, established surface treatment techniques will be explained and new developments will be presented.

ASML uses several specialized surface treatments in complex and demanding applications. Some of these are Nickel plating, Anodizing, Diamond line coatings, specialized coatings for optics, coatings for wafer tables, coatings for wafer clamps, inorganic black. Potential future requirements will be outlined. Problems yet to be solved will also be explained.

Bodycoat is an established heat treatment and surface treatment group. Surface hardening processes offered by Bodycoat with underlying metallurgical principals will be explained, as well as practical execution of the processes. Examples of practical applications will be presented and precautions to be taken for successful surface treatments will be explained.

TOPIC: HYBRID HALIDE PEROVSKITE SOLAR CELLS

Join us online via Zoom to participate in the discussion of some of today’s most thrilling materials science topics. Register here. 

Presented by:   
Dr. Monica Morales Masis
Associate Professor at the Inorganic Materials Science Group, Faculty of Science and Technology, University of Twente

Speakers:
Dr. Sjoerd Veenstra
Programme Manager Perovskite Solar Cells at TNO – partner in Solliance

Prof. Dr. Henk Bolink
Professor at the Inorganic Chemistry Department and group leader at the Institute of Molecular Science of the University of Valencia

Abstract: 

Perovskites are highly versatile crystal structures. Perovskite crystal structures can accommodate a variety of cations which allows tuning of the materials properties. Hybrid halide perovskites of the form APbX₃ (with A = an organic or inorganic cation and X = I, Br or Cl), have attracted tremendous attention in the photovoltaics field due to their excellent and tunable optoelectronic properties. Thin film solar cells using hybrid halide perovskite absorbers have reached efficiencies above 25% in less than 10 years of development, which is an unprecedented rise in efficiency when comparing to other technologies. However, their roll-out into industry and commercial application of thin film perovskite solar cells require improvements in material instability and the availability of up-scalable production methods.

This colloquium will address the progress and challenges regarding fabrication of these halide perovskite absorbers, solar cell fabrication and scalability prospects.

Solution-processed halide perovskites for solar cells: materials and scalability challenges by Dr. Sjoerd Veenstra
Solar cells are based on semi-conductors. In general, one can say, that with increasing the quality of the semiconductor, the performance of the solar cell increases. Perovskite solar cells are an exception to this guideline. Thin layers of solution processed perovskite reach very high performance. In the presentation, the methods and current status of solution process perovskite solar cells and small solar modules is discussed. 

 
Vapor-deposited halide perovskites for solar cells: materials and scalability challenges by Prof. Dr. Henk Bolink
Perovskite based solar cells, mostly employ solution processed perovskite layers. Our group has developed several perovskite based solar cells, using vacuum based perovskite preparation methods. The benefits and hurdles of this dry preparation process will be discussed with the focus on scalability and reproducibility of the preparation method.

TOPIC: Laser Processing

Join us online via Zoom (register here) or in person at Oosthorst building OH115*, to participate in the discussion of some of today’s most thrilling materials science topics. 

Speakers:   

Prof.dr.ir. Gert-willem Römer
Professor at the Chair of Laser Processing at the department of Mechanics of Solids, Surfaces & Systems (MS3) of the Faculty of Engineering technology

Dr. Matthias Feinaeugle
Assistant professor at the Chair of Laser Processing at the the department of Mechanics of Solids, Surfaces & Systems (MS3) of the Faculty of Engineering technology

Abstract: 

Prof.dr.ir. Gert-willem Römer
Due to its specific properties, the laser source has evolved into a device which is used for several applications, including material processing. High power LASERs can be used for processes like cutting, welding, surface treatments and micro- or nano-manufacturing. In comparison to conventional (thermal) processing, such as plasma cutting, and TIG or MIG welding, processing with laser sources is: fast, accurate, flexible in terms of the type of material to be processed and product geometry, and show a small heat-affected-zone, and is easy to automate. This is why the laser can (and does) not only replace conventional mechanical and thermal processing, but also opens possibilities for new processing methods. Depending on the pulse duration, laser wavelength and intensity the laser-material interaction is thermal (referred to as photo-thermal interaction) or non-thermal (referred to as photo-chemical interaction). Many laser processing applications are based on photo-thermal processing. As an example, laser-based Directed Energy Deposition (DED) using a 10kW laser source will be discussed,  as well as applications (in the field additive manufacturing of large scale (1 to 10 m) metallic products for the off-shore industry (e.g. ship propeller) and steel production industry) will be shown and discussed. Then applying laser pulses with durations in the range of femto- to picoseconds, the absorbed laser energy will not heat the material, but will directly break the chemical bonds in the material. Unlike thermal processing, where repeatability is hindered by the randomness of the melting process, this results in increased accuracy of the machining process down to the micro-meter and nano-meter scale. The latest fundamental aspects of the process, as well as applications (e.g. in the field of surface texturing will be presented and discussed.

Dr. Matthias Feinaeugle
Laser-induced Forward Transfer (LIFT) is an Additive Ma­nu­facturing tech­nique, which allows to transfer nearly any material on the micro-meter scale. It has the potential to print three-dimensional micro-structures. The donor material to be printed consists of a thin film, which is supported by a carrier substrate. The carrier substrate is transparent to the incident laser wavelength. When a pulsed laser beam is focused on the carrier–donor interface the absorbed laser energy ejects the donor material onto a receiving substrate. The latter is usually referred to as the receiver. Besides in liquid phase, the donor material can also be transferred in solid phase. This work presents methods, tools and results of LIFT-printing copper and gold 3D structures and their potential applications.

TOPIC: TBA

Join us online via Zoom to participate in the discussion of some of today’s most thrilling materials science topics. Register here. 

TOPIC: ADVANCED X-RAY TOOLS IN MATERIALS SCIENCE

Date: 13 January 2022 | Time: 15:45 – 17:30 hrs

Join us online via Zoom to participate in the discussion of some of today’s most thrilling materials science topics:
https://utwente-nl.zoom.us/j/85604139182

Presented by:   
Prof. Dr. Ir. Gertjan Koster
Full Professor of Physics of Inorganic Nanomaterials, Faculty of Science and Technology, University of Twente 

SPEAKERS & TITLES

Dr. Milen Gateshki (Malvern Panalytical, Almelo)
Overview of industrial X-ray metrology applications

Dr. Igor Makhotkin (XUV Optics, Univ. Twente)
In-lab hybrid X-ray metrology for thin films, multilayers and periodic 2D/3D structures

Prof. dr. Christian Schroer (DESY & Univ. Hamburg)
X-ray optics and microscopy at modern synchrotron radiation sources

ABOUT THE COLLOQUIUM SERIES:

The Materials Science & Engineering Colloquium Series provides a platform for all those who are interested in materials science, whether you are a student, researcher at MESA+, faculty member, or working in the industry. During each session, challenging topics will be presented by experts from academia and industry. All cases are based on a realistic problem where a solution was found by combining existing materials science knowledge and new insights through an experimental or materials system model approach.