ETRI develops eco-friendly color thin-film solar cells
The eco-friendly color CIGS thin film solar cells developed by ETRI researchers. Credit: Electronics and Telecommunications Research Institute (ETRI)
CIGS thin-film solar cells are used to convert sunlight into electrical energy and are made by coating multiple thin films on a glass substrate.
They have a relatively higher absorption coefficient among non-silicon based cells, resulting in high conversion efficiency and long stability. Also, they require less raw materials compared to silicon-based cells; hence less process and material costs.
One downside has been the difficulty in commercialization as they use the buffer layer which contains toxic heavy metal, cadmium. Thus, the ETRI team replaced the cadmium sulfide (CdS) buffer layer with zinc (Zn) based materials– which is not harmful — and managed to achieve approximately 18% conversion efficiency; thus eliminating the obstacle to commercialization.
Likewise, the availability of more than 7 colors including purple, green, and blue — without the need for additional process or cost — means one step closer to full-on commercialization.
Moreover, the researchers succeeded in identifying a new analysis method using photo-pumping terahertz spectroscopy and a mechanism for improving the conversion efficiency of solar cells with Zn-based buffer layers.
The solar cells are only 3? thick and can be coated on a flexible substrate as well as a glass substrate. This means that they could be bent or folded, expanding applications as a next-generation eco-friendly energy source.
“This technology will contribute to the solar power system development through the production of high value-added color photovoltaic modules,” said Yong-Duck Chung, the ETRI principal researcher.
The excellence of the research was proven by its publication in 'Nano Energy' and 'Progress in Photovoltaics: Research and Applications' as the cover article, globally esteemed international journals in the energy sector.
###
About Electronics and Telecommunications Research Institute (ETRI) (https:/
ETRI is a non-profit government-funded research institute. Since its foundation in 1976, ETRI, a global ICT research institute, has been making its immense effort to provide Korea a remarkable growth in the field of ICT industry. ETRI delivers Korea as one of the top ICT nations in the World, by unceasingly developing world's first and best technologies.
Media Contact
More Information:
http://dx.doi.org/10.1016/j.nanoen.2020.104855All latest news from the category: Power and Electrical Engineering
This topic covers issues related to energy generation, conversion, transportation and consumption and how the industry is addressing the challenge of energy efficiency in general.
innovations-report provides in-depth and informative reports and articles on subjects ranging from wind energy, fuel cell technology, solar energy, geothermal energy, petroleum, gas, nuclear engineering, alternative energy and energy efficiency to fusion, hydrogen and superconductor technologies.
Newest articles
Soil ecosystem more resilient when land managed sustainably
Compared to intensive land use, sustainable land use allows better control of underground herbivores and soil microbes. As a result, the soil ecosystem is more resilient and better protected from…
Drug resistant fungi spreading: Focus on Candida parapsilosis
The yeast Candida parapsilosis is emerging as a growing threat for hospitalized patients in a new study. A team led by Dr Amelia Barber from the Cluster of Excellence “Balance…
New Insights into the Evolution of Neurons in Vertebrate Brains
Assumptions that may seem self-evident are not always accurate when it comes to the evolution of vertebrate brains. Researchers at the University of Bayreuth have now demonstrated this by examining…