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05 June 2019 | Story Leonie Bolleurs | Photo Leonie Bolleurs
Lucas Erasmus and Prof Hendrik Swart
Lucas Erasmus and Prof Hendrik Swart (right) are working on a joint project with Ghent University to find an attractive solution to address the energy demands of buildings, electric motor vehicles, and mobile electronics.
With a constant increase in the price of electricity, any innovation to replace this necessity in our daily lives is welcome. 

The University of the Free State (UFS), whose vision is supported by an element of innovation, welcomes the recent agreement between its Department of Physics and Ghent University.

Attractive solution

Not only will this research – which aims to develop the materials necessary for transparent solar panels – enlarge the international research footprint of the UFS, but it is also an attractive solution to address the energy demands of buildings, electric motor vehicles, and mobile electronics without affecting their appearance.

According to Prof Hendrik Swart, from the UFS Department of Physics, the agreement between the two universities entails a joint doctoral degree in which both universities will supervise the project and the awarding of the doctorate. The student, Lucas Erasmus, will conduct research at both institutions.

Transparent solar panel

The idea with the research is to develop glass that is transparent to visible light, just like the glass you find in the windows of buildings, motor vehicles, and mobile electronic devices. However, by incorporating the right phosphor materials inside the glass, the light from the sun that is invisible to the human eye (ultraviolet and infrared light) can be collected, converted, and concentrated to the sides of the glass panel where solar panels can be mounted. This invisible light can then be used to generate electricity to power these buildings, vehicles, and electronic devices. The invention is therefore a type of transparent solar panel.

Implemented in cellphone screens

This technology can be implemented in the building environment to meet the energy demands of the people inside the buildings. 

The technology is also good news for the 4,7 billion cellphone users in the world, as it can be implemented in the screens of cellphones, where the sun or the ambient light of a room can be used to power the device without affecting its appearance. 

Another possible application is in electric cars, where the windows can be used to help power the vehicle.

Low-income housing

Erasmus added: “We are also looking at implementing this idea into hard, durable plastics that can act as a replacement for zinc roofs.” 

“This will allow visible light to enter housing, and the invisible light can then be used to generate electricity. The device also concentrates the light from a large area to the small area on the sides where the solar panels are placed; therefore, reducing the number of solar panels needed and, in return, reducing the cost.”

The technology will take about a decade to implement.

“This study is currently ongoing, and we are experimenting and testing different materials in order to optimise the device in the laboratory. After this, it needs to be upscaled in order to test it in the field. It is truly the technology of the future,” said Erasmus.

Video: Barend Nagel

News Archive

Innovation the focus of 28th Sophia Gray Memorial Lecture
2016-09-06

Description: Stratford furniture design Tags: Stratford furniture design

Stratford never lost his passion for designing
furniture. Pictured here is some of his furniture
exhibited at the Oliewenhuis Art Museum.
Photo: Francois van Vuuren: iFlair Photography

Al Stratford, designer, inventor and architect, presented the 28th Sophia Gray Memorial Lecture on 25 August at the Reservoir at the Oliewenhuis Art Museum in Bloemfontein. The event, hosted by the Department of Architecture at the University of the Free State, was also the opening of an exhibition of Stratford’s work.

In his career of 40 years, Stratford has patented many products and won several awards in industrial design and architecture. He is known in South Africa for his development of innovative building technology such as the Winblok Precast Concrete Window System. In 2009 and 2010, he also served as president of the South African Institute of Architects.

The title of his lecture was: Reductive Innovation in Architecture. Throughout his career, Stratford endeavoured – through his designs and inventions – to apply the principle of “reduction” to the building material he used and technology he examined.

Stratford designs and builds smart buildings
Stratford says a home is the paradigm of self-expression. His career as architect started with the building of five houses in Gonubie, near East London. Everything he knew about architecture at that stage, he had taught himself by reading on the subject at the local library. Later on, he achieved great heights in his career by designing and building, among others, the Stratford Guesthouse; the sustainable and resourcefully designed campus buildings for the University of Fort Hare (an institutional building not utilising any electrical air-conditioning); the Edenvale Baptist Church; and a community hall.

His technology is widely used in the building industry

“The arrogance in me gets humiliated when I
see what other people and God has done.”


His technical drawing skills, acquired at an early age during his training as motor mechanic, are still practised years later, particularly in his inventions. Stratford is the inventor of technology commonly used in the building industry today. Of these, the Winblok window system which he patented in 1981, is one of his best known patents. The use of these windows is characteristic of many of the buildings he designed and built. Other technology he invented and patented, includes the Winstep stairs, the Windeck flooring system, and the StratFlex furniture technology.

Furniture designs win him awards
He likes to quote architect Ludwig Mies van der Rohe: “A chair is a very difficult object. A skyscraper is easier.” Stratford started designing and manufacturing his own furniture and never lost this passion. In 2013, he won the Innovation Award at the Design Indaba for his “flat pack” furniture technology.

The humble Stratford – designer, inventor, industrialist, and architect – says he is simply playing around with God’s creation. “The arrogance in me gets humiliated when I see what other people and God has done.”

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