Blog Layout

Oxygen adds new element to solar conversion

Elizabeth Gracie
A team of researchers from the University of New South Wales (UNSW) and the University of Kentucky have created a technology that enables more energy to be captured from the sun to power solar cells more effectively. 

Originally published in Nature Photonics, the research is an exciting development in light conversion technologies and has ramifications for solar photovoltaics, biomedical imaging, drug delivery and photocatalysis. 

However, Professor Tim Schmidt from UNSW Science says that more work is needed before commercialisation to achieve higher efficiency in the technology. 

“The energy from the sun is not just visible light,” said Schmidt. 

“The spectrum is broad, including infrared light which gives us heat and ultraviolet which can burn our skin. Most solar cells, charge couple (CCD) cameras and photodiodes (a semiconductor that converts light into electrical current) are made from silicon, which cannot respond to light less energetic than the near-infrared.

“This means that some parts of the light spectrum are going unused by many of our current devices and technologies.”

To rectify this and extend the range of sensitivity in these devices, as well as the efficiency of solar cells the team were able to upconvert low-energy light into more energetic, visible light which can excite silicon. 

According to Professor Schmidt, this can be achieved by capturing smaller energy photons of light and glueing them together. 

“This can be done by interacting the excitons - bound states of electrons and electron holes that can transport energy without transporting net electric charge - in organic molecules,” said Schmidt. 

Research conducted by the ARC Centre of Excellence in Exciton Science also identified a way to resolve this challenge by using oxygen which is usually detrimental to molecular excitons. 

Contributing author Professor Jared Cole from RMIT University said that traditionally oxygen is the Achilles heel but could be used at a lower energy so it can mediate energy transfer, allowing the organic molecules to emit visible light, above the silicon gap. 

“What’s interesting is that often without oxygen, lots of things work well. As soon as you allow oxygen in, they stop working,” said Cole. 

“It was the Achilles heel that ruined all our plans but now, not only have we found a way around it, suddenly it helps us.”

Lead author of the study, Elham Gholizadeh from UNSW Science is optimistic about the benefits of the research to the real world after more tests are completed to improve the efficiency of the technology. 

“I’m very hopeful and think we can improve the efficiency quickly. I think it’s quite exciting for everyone. It’s a good method to use oxygen to transfer energy” said Gholizadeh. 

Whilst the efficiencies are still very low, scientists will continue to explore methods of using oxygen to transfer energy and power solar cells technology. 
By By Harley Paroulaksis, CEO Paspalis, CEO Darwin Innovation Hub 20 May, 2023
Getting asked what we look for in deals is one of the most common questions I get as an investment manager.
20 May, 2023
The Small Business Association of Australia is dedicated to supporting SMEs, acting as their voice to government and helping them connect, grow, and prosper well into the future.
By By Shiv Meka 20 May, 2023
Sensibles may sound like science fiction, but this revolutionary technology is making waves in aged-care facilities, and has the potential to transform health monitoring at scale.
28 Mar, 2023
Alice Springs and the deserts of Central Australia don’t sound like a food basket, but they are for businesswoman and bush foods innovator Rayleen Brown.
By Gillian Cumming 28 Mar, 2023
A new report aims to lay the foundations for a deeper and more meaningful and equitable relationship between Indigenous and non-Indigenous Australians in the mining transition sector.
By Dr Saraid Billiards - CEO of the Association of Australian Medical Research Institutes. 27 Mar, 2023
If the health and medical research sector in Australia is to move forward, it must address gender equity, diversity, and inclusion- which means making the sector a safe and inclusive workspace for all.
27 Jan, 2023
A ground-breaking sheep technology system is bettering the businesses and lives of Australian sheep breeders thanks to a revolutionary combination of software, hardware, and support never before combined into one cohesive unit.
27 Jan, 2023
ANCA took an early view to look beyond Australia’s shores whilst developing advanced manufacturing technologies now viewed as ‘business as usual’
By Andrew Downs 27 Jan, 2023
As Australia grapples with a critical skills shortage, many are now encouraging young people to embrace a career in the trades, where a wealth of opportunities awaits.
By By Ben Kehoe 27 Jan, 2023
In 2016 I published a blog article titled Moonshots for Australia: 7 For Now. It’s one of many I have posted on business and innovation in Australia. In that book, I highlighted a number of Industries of the Future among a number of proposed Moonshots. I self-published a book, Innovation in Australia – Creating prosperity for future generations, in 2019, with a follow-up COVID edition in 2020. There is no doubt COVID is causing massive disruption. Prior to COVID, there was little conversation about National Sovereignty or supply chains. Even now, these topics are fading, and we remain preoccupied with productivity and jobs! My motivation for this writing has been the absence of a coherent narrative for Australia’s business future. Over the past six years, little has changed. The Australian ‘psyche’ regarding our political and business systems is programmed to avoid taking a long-term perspective. The short-term nature of Government (3 to 4-year terms), the short-term horizon of the business system (driven by shareholder value), the media culture (infotainment and ‘gotcha’ games), the general Australian population’s cynical perspective and a preoccupation with a lifestyle all create a malaise of strategic thinking and conversation. Ultimately, it leads to a leadership vacuum at all levels. In recent years we have seen the leadership of some of our significant institutions failing to live up to the most basic standards, with Royal Commissions, Inquiries and investigations consuming excessive time and resources. · Catholic Church and other religious bodies · Trade Unions · Banks (and businesses generally, take casinos, for example) · the Australian Defence Force · the Australian cricket teams · our elected representatives and the staff of Parliament House As they say, “A fish rots from the head!” At best, the leadership behaviour in those institutions could be described as unethical and, at worst….just bankrupt! In the last decade, politicians have led us through a game of “leadership by musical chairs” – although, for now, it has stabilised. However, there is still an absence of a coherent narrative about business and wealth creation. It is a challenge. One attempt to provide such a narrative has been the Intergenerational Reports produced by our federal Government every few years since 2002. The shortcomings of the latest Intergenerational Report Each Intergenerational Report examines the long-term sustainability of current government policies and how demographic, technological, and other structural trends may affect the economy and the budget over the next 40 years. The fifth and most recent Intergenerational Report released in 2021 (preceded by Reports in 2002, 2007, 2010 and 2015) provides a narrative about Australia’s future – in essence, it is an extension of the status quo. The Report also highlights three key insights: 1. First, our population is growing slower and ageing faster than expected. 2. The Australian economy will continue to grow, but slower than previously thought. 3. While Australia’s debt is sustainable and low by international standards, the ageing of our population will pressure revenue and expenditure. However, its release came and went with a whimper. The recent Summit on (what was it, Jobs and Skills and productivity?) also seems to have made the difference of a ‘snowflake’ in hell in terms of identifying our long-term challenges and growth industries. Let’s look back to see how we got here and what we can learn. Australia over the last 40 years During Australia’s last period of significant economic reform (the late 1980s and early 1990s), there was a positive attempt at building an inclusive national narrative between Government and business. Multiple documents were published, including: · Australia Reconstructed (1987) – ACTU · Enterprise Bargaining a Better Way of Working (1989) – Business Council of Australia · Innovation in Australia (1991) – Boston Consulting Group · Australia 2010: Creating the Future Australia (1993) – Business Council of Australia · and others. There were workshops, consultations with industry leaders, and conferences across industries to pursue a national microeconomic reform agenda. Remember these concepts? · global competitiveness · benchmarking · best practice · award restructuring and enterprising bargaining · training, management education and multiskilling. This agenda was at the heart of the business conversation. During that time, the Government encouraged high levels of engagement with stakeholders. As a result, I worked with a small group of training professionals to contribute to the debate. Our contribution included events and publications over several years, including What Dawkins, Kelty and Howard All Agree On – Human Resources Strategies for Our Nation (published by the Australian Institute of Training and Development). Unfortunately, these long-term strategic discussions are nowhere near as prevalent among Government and industry today. The 1980s and 1990s were a time of radical change in Australia. It included: · floating the $A · deregulation · award restructuring · lowering/abolishing tariffs · Corporatisation and Commercialisation Ross Garnaut posits that the reforms enabled Australia to lead the developed world in productivity growth – given that it had spent most of the 20th century at the bottom of the developed country league table. However, in his work, The Great Reset, Garnaut says that over the next 20 years, our growth was attributable to the China mining boom, and from there, we settled into “The DOG days” – Australia moved to the back of a slow-moving pack! One unintended consequence of opening our economy to the world is the emasculation of the Australian manufacturing base. The manic pursuit of increased efficiency, lower costs, and shareholder value meant much of the labour-intensive work was outsourced. Manufacturing is now less than 6% of our GDP , less than half of what it was 30 years ago!
More Posts
Share by: