A new cooperation study between six universities, including three in Australia, has shown how Cesium bromide can considerably improve the efficiency of crystalline silicon solar cells.
An international research group has published breakthrough findings that demonstrate how the Ionian connection cesium bromide (CSBR) can considerably improve the efficiency of crystalline silicon (C-SI) solar cells.
Researchers from the University of Melbourne In Victoria, the University of New South Wales (UNSW) and the Australian National University (ANU) in the Australian Capital Territory (ACT), with scientists based in China, the Netherlands and Germany, it discovered that by using CSBR as an intermediate layer, more effective passivating contacts are created.
They showed that a variety of thin, ionic intermediate layers can create an OHM contact with low resistance in solar cells, whereby CSBR was executed exceptionally well, especially in combination with a passivating layer such as titanium oxide (TIX).
“After glowing at 250 ° C, the passion quality and work function of the device were further improved. This optimized structure was used to create a solar cell with an efficiency of more than 19% in his as a deposited state, which increased to an impressive 20.5% after glowing,” the researchers said.
The study suggests that future improvements can focus on improving passivation Quality of the layers And use more reflective materials such as silver (AG) to stimulate optical performance.
The discovery goes for the challenge in the design of conventional passivating contacts, such as Amorf silicon and polysilicon, while being effective in absorbing light, reduces efficiency. The new CSBR approach, on the other hand, makes greater light absorption possible, the researchers added.
The team, which includes Nanchang Hangong University researchers in China, Eindhoven University of Technology in the Netherlands, and Helmholtz-Zentrum Berlin in Germany, built a solar cell on laboratory scale that integrated the new CSBR layer and achieved record-breaking efficiency.
“We were able to demonstrate an efficiency of more than 20% on a solar cell on laboratory scale that the TIOX/CSBR/Al-Stapel implements as Full-area rear electron selective contact,” the scientists say.
The research results can be found in the paper ‘Electron contact intermediate layers for low temperature -processed crystalline silicon solar cells“Published in Progress in photovoltaic.
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