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27 July 2021 | Story Leonie Bolleurs | Photo UFS Photo Archive
Prof Hendrik Swart played a key role in the Department of Physics acquiring the PHI Quantes XPS system, the first in Africa and one of only 20 in the world.

The state-of-the-art equipment in the Department of Physics at the University of the Free State (UFS) differentiates this department from its competitors. Availability of the equipment makes it possible for researchers as well as students to deliver work that receives national and international recognition. 

Recently, the department acquired a PHI Quantes XPS system, the first in Africa and one of only 20 in the world. 

Creating better phosphor 

“The Quantes XPS system uses X-rays to determine the chemical composition of molecules on the surface of a sample. The system is unique in the sense that it also has an extra X-ray source that can determine the chemical state below the surface, which was not possible in the past.  This will help us to dictate the position of defects in our phosphor materials that will consequently enable us to create better phosphor for solid state lighting as well as solar cell applications,” explains Prof Hendrik Swart, Senior Professor in the Department of Physics, who also holds the SARChI Chair in Solid State Luminescent and Advanced Materials.

After he had the opportunity to observe the system in the factory in Chigasaki, Kanagawa, Japan, where he attended a conference, Prof Swart was very impressed by its performance. He discussed it with Prof Koos Terblans, Head of the department, and other colleagues, and started making plans to buy the system. 

When the department first bought the X-ray photoelectron spectroscopy (XPS) system in 2007/2008, it became the national facility on XPS measurements. Not only is this an upgrade of the XPS system bought 14 years ago, but the new system will enable the department to do more measurements. “The number of samples that we have to handle has just become too much for one system. The new system’s increased capacity for making measurements addresses this challenge and it also gives UFS scientists and postgraduate students more time to spend on fundamental measurements to develop research of a higher level,” says Prof Swart.

(The Quantes XPS system. Photo:Supplied)

Explaining about the measurements, Prof Swart says: “This advanced X-ray photoelectron spectroscopy (XPS) instrument has the capability to analyse the very small area that the user is interested in and a large area of the uniform sample surface. The two different types of X-ray sources – the hard X-ray source and the more conventional soft X-ray source – can be switched automatically, allowing users to analyse the same area and/or points of a sample. The PHI Quantes XPS system ensures the availability of superior features such as automatic analysis, automatic sample transfer, turnkey charge neutralisation, and advanced data processing.”

“This XPS instrument is designed to pioneer new methods and applications transcending conventional ideas of what is possible.”

Optimising efficiency of materials

Prof Swart says the Department of Physics, especially the Research Chair in Advanced and Luminescent Materials, is developing new high-technology materials on a daily basis. “It is very important to know the chemical composition and defect distribution of the materials in order to add value to the fabrication of these materials,” he adds.

“The distribution of these defects is vital for the efficiency of the phosphor materials. If we know where these defects are located, we can determine the mechanisms of the light output coming from these phosphors,” describes Prof Swart.

Research conducted as part of the Research Chair in Solid State Luminescent and Advanced Materials will benefit significantly from this new system.

(Prof Koos Terblans, Head of the Department of Physics next to the Quantes XPS system. Photo:Supplied) 

“We are currently concentrating on phosphors as sensors (temperature), light-emitting diodes (LEDs), and solar cells, where we optimise the efficiency and durability of these materials. Any new knowledge, which I believe the PHI Quantes XPS system will provide us, will help us to reach our goal much quicker,” he says. 

Apart from the positive impact on research, the PHI Quantes XPS system will also be a benefit to society in the long term. Improved LEDs can be used to save electricity, and better solar cells can help to generate electricity, to mention but two examples. 

News Archive

UFS staff get salary adjustment of 13,35%
2008-11-13

 

At the signing of the salary agreement were, from the left: Prof. Johan Grobbelaar, Chairperson of UVPERSU, Prof. Teuns Verschoor, Acting Rector of the UFS, and Ms Senovia Welman, Chairperson of NEHAWU.
Photo: Anita Lombard

UFS staff get salary adjustment of 13,35%

The University of the Free State’s (UFS) management and trade unions have agreed on an improvement in the service benefits of staff of 16,55% for 2009. This includes a general salary adjustment of 13,35% (according to the estimated government subsidy that will be received in 2009).

“The negotiating parties agreed that adjustments could vary from a minimum of 13,00%, or more, depending on the government subsidy and the model forecasts. If the minimum of 13,00% is not affordable, the parties will re-negotiate,” said Prof. Teuns Verschoor, Acting Rector of the UFS.

“The negotiations were conducted in a positive spirit and the parties are in agreement that it is an exceptionally good adjustment – being higher than for example the increase in medical premiums,” said Prof. Verschoor.

The agreement was signed yesterday by representatives of the UFS management and the trade unions, UVPERSU and NEHAWU.

An additional once-off non-pensionable bonus of R3 390 will also be paid to staff later this year.

The bonus will be paid to all staff members who were in the employ of the UFS on UFS conditions of service on 10 November 2008 and who assumed duties before 1 October 2008. This includes all former Vista staff, regardless of whether they have already been aligned with UFS conditions of service.


The bonus is payable in recognition of the role played by staff during the year to promote the UFS as a university of excellence and as confirmation of the role and effectiveness of the remuneration model.

“It is important to note that this bonus can be paid due to the favourable financial outcome of 2008,” said Prof. Verschoor.

It is the intention to pass the maximum benefit possible on to staff without exceeding the limits of financial sustainability of the institution. For this reason, the negotiating parties reaffirmed their commitment to the Multiple-year Income-related Remuneration Improvement Model used as a framework for negotiations. The model and its applications are unique and has as a point of departure that the UFS must be and remain financially sustainable.

Additional funding (0,70%) was also negotiated. This will be allocated on 1 January 2009 to accelerate the phasing-in of medical benefits and, if possible, to finalise the phasing-in process. Agreement was reached that 2,50% will be allocated for growth in capacity building to ensure that provision is made for the growth of the UFS over the last few years, as well as the incorporation of Vista staff.

The agreement also applies to all staff members of the two above-mentioned campuses whose conditions of employment have already been aligned with those of the Main Campus.

The implementation date for the salary adjustment is 1 January 2009. The adjustment will be calculated on the total remuneration package.

In 2008, a total improvement of service benefits of 9,32% and a salary adjustment of 7,52% were paid to employees. Staff received a once-off non-pensionable bonus of R3 000 at the end of 2007.

Media Release
Issued by: Lacea Loader
Assistant Director: Media Liaison
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: loaderl.stg@ufs.ac.za  
12 November 2007
 

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