A perovskite solar module the size of an A4 sheet of paper, which is nearly six times bigger than 10×10 cm2 modules of that type reported before, has been developed by Swansea University researchers, by using simple and low-cost printing techniques.
The breakthrough shows that the technology works at a larger scale, not just in the lab, which is crucial for encouraging industry to take it up.
Each of the many individual cells forming the module is made of perovskite, a material of increasing interest to solar researchers as it can be made more easily and cheaply than silicon, the most commonly-used material for solar cells.
Perovskite solar cells have also proved to be highly efficient, with scores for power conversion efficiency (PCE) – the amount of light striking a cell that it converts into electricity – as high as 22% on small lab samples.
The team work for the SPECIFIC Innovation and Knowledge Centre led by Swansea University. They used an existing type of cell, a Carbon Perovskite Solar Cell (C-PSC), made of different layers – titania, zirconia and carbon on top – which are all printable.
Though their efficiency is lower than other perovskite cell types, C-PSCs do not degrade as quickly, having already proved over 1 year’s stable operation under illumination.
The Swansea team’s breakthrough comes from the optimisation of the printing process on glass substrates as large as an A4 sheet of paper. They ensured the patterned layers were perfectly aligned through a method called registration, well-known in the printing industry.
The entire fabrication process was carried out in air, at ambient conditions, without requiring the costly high-vacuum processes which are needed for silicon manufacture.
The Swansea team achieved good performance for their modules:
– up to 6.3% power conversion efficiency (PCE) when assessed against the “1 sun” standard, i.e. full simulated sunlight. This is world-leading for a C-PSC device of this size.
– 11% PCE at 200 lux, roughly equivalent to light levels in an average living room
– 18% PCE at 1000 lux, equating to light levels in an average supermarket.
The high efficiency ratings under indoor lighting conditions demonstrate that this technology has potential not only for energy generation outdoors but also for powering small electronic devices – such as smartphones and sensors – indoors.
Dr Francesca De Rossi, technology transfer fellow at Swansea University’s SPECIFIC Innovation and Knowledge Centre, said:
“Our work shows that perovskite solar cells can deliver good performance even when produced on a larger scale than reported so far within the scientific community. This is vital in making it economical and appealing for industry to manufacture them.
The key to our success was the screen printing process. We optimised this to avoid defects caused by printing such large areas. Accurate registration of layers and patterning the blocking layer helped improve connections between cells, boosting overall performance.
There is more work still to do, for example on increasing the active area – the percentage of the substrate surface that is actually used for producing power. We are already working on it.
But this is an important breakthrough by our team, which can help pave the way for the next generation of solar cells”
The Latest on: Perovskite solar cell
via Google News
The Latest on: Perovskite solar cell
- Scratching the Surface of Perovskites | IDTechEx Research Articleon November 30, 2019 at 12:36 am
Sandwiching perovskite materials between other functional layers forms perovskite solar cells. However, defects in the perovskite layer can disrupt charge transfer between the perovskite and adjacent ...
- Perovskite Solar Cells Can Capture More Electricity | IDTechEx Research Articleon November 27, 2019 at 12:22 am
In a paper published in Science Advances, physicists Professor Sum Tze Chien from NTU and Professor Maxim Pshenichnikov from UG used extremely fast lasers to observe how an energy barrier forms when ...
- Scratching the surface of perovskiteson November 25, 2019 at 10:39 am
The researchers' findings may inform future engineering approaches to optimize perovskite solar cells. Versatile compounds called perovskites are valued for their application in next generation solar ...
- Clear, conductive coating could protect advanced solar cells, touch screenson November 25, 2019 at 4:44 am
When incorporated into a type of high-efficiency solar cell, the material increased the cell’s efficiency and stability. The new findings are reported in the journal Science Advances ("Tuning, ...
- Perovskite Solar Cells Market 2019 Global Analysis, Opportunities and Forecast To 2022on November 22, 2019 at 5:55 am
In particular, perovskite solar cells represent an emerging category of thin film solar cells with very good prospects for becoming a replacement for not only other thin film solar technologies, but ...
- Most Read articles – Energy harvesting, Qualcomm 5G, Intel’s crownon November 22, 2019 at 4:24 am
See what your peers have been reading recently. What topics have caught the readers’ interest? There’s a Dutch energy harvesting company, improved efficiency of Perovskite solar cells, Qualcomm’s 5G ...
- Hot electrons give up the goodson November 21, 2019 at 2:55 am
The finding may help to increase the efficiency of perovskite solar panels. The performance of perovskite solar cells has improved spectacularly over the past decade. In 2009, an efficiency of 3.8 ...
- NTU and Dutch Scientists Develop Perovskite Solar Cells to Capture More Electricityon November 20, 2019 at 11:10 pm
This energy loss is why conventional solar cells have a theoretical limit of 33 per cent for power conversion efficiency. The best perovskite solar cells so far have exhibited 25 per cent ...
- Minimizing non-radiative recombination losses in perovskite solar cellson November 19, 2019 at 12:35 pm
Nevertheless, the best research-cell efficiencies are still below the theoretical limit defined by the Shockley–Queisser theory, owing to the presence of non-radiative recombination losses. In this ...
via Bing News