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Hong Kong University of Science and Technology Assistant Professor Yan He (centre) holds a handful of polymer solar cell papers that are cheaper to make, lighter, and more flexile than silicon, and less likely to rot. "Ming Pao"
Hong Kong’s “Ming Pao†reported on the 14th that all people have experienced phone calls. It is hoped that a “solar-transformed battery paper†will be posted on the phone in the future.
According to reports, the researchers succeeded in finding new material combinations for the conversion of solar energy materials into polymers, which cost 90% less than traditional silicon and buckling.
The research was co-authored by Dr. Yan He, Assistant Professor of Chemistry, Hong Kong University of Science and Technology, and Harald Ade and Dr. Ma Wei from North Carolina State University. The results were just published in the journal Nature Communications. The HKUST Technology Transfer Center is studying the commercialization of this technology.
The report said that currently, solar conversion materials are mainly silicon, and silicon production costs are high. A4 size costs range from 390 to 780 Hong Kong dollars, and they are heavy and fragile, and their installation is complicated, but the photoelectric conversion efficiency (the efficiency of converting light energy into electricity) ) is the highest in the current material, up to 20%.
Yan He explained that the polymer solar cell consists of a mixture of a polymer donor and a fullerene receptor. The production cost is lower than that of silicon, and it is also lighter and buckling, and it is less likely to rot.
Light-to-energy efficiency breakthrough 10%
Yan He pointed out that the photoelectric conversion efficiency of the polymer material combination has not been able to break through 10%, limiting the application, but the team discovered the characteristics of highly efficient conversion materials and successfully developed 3 new polymer materials and more than 10 fullerene in the past 1 year. In the blend film of ene acceptor, the conversion efficiency of the five material combinations was as high as 10.8%.
Cost reduction 90% life only 5 years
The process of making a polymer solar cell is similar to that of a printed newspaper. Yan He estimates that if it is mass-produced, the size of A4 needs to be less than HK$78 and the cost will be reduced by 90%.
He said that the low cost and high efficiency will facilitate wide application, such as small appliances such as electric remote controls, projector lights, etc., and sticking a polymer solar-converted battery paper in the fuselage will have enough power to operate without batteries. Reduce production and disposal of battery pollution.
However, because smartphones, tablet PCs and other electronic products use a large amount of electricity, at this stage, it is necessary to install photoelectric conversion battery paper on the surface of the handbag to provide enough power. Yanhe expects to increase the photoelectric conversion efficiency to 15% in 5 years. For products with larger power consumption, solar cells on the fuselage can also be operated with sufficient power.
However, he pointed out that the life span of polymer solar cells is 5 to 7 years, which is shorter than that of silicon solar cells for 20 years.
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