Other members
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Prof. Dr. Hab. DANG Mau Chien
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Eng. BUI Thanh Tung (PhD. Stud.)
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MSc. PHAN Thanh Nhat Khoa
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Eng. HOANG Ngoc Vu (PhD. Stud.)
Introduction
Vietnam territory lies in most sunny ribbon of the northern sphere (lower than 30° of latitude). This geographical position is a big favorable potential to develop the solar energy industry in general and solar electricity in particular. Apart from this natural climate condition, Vietnam also pays attentions to follow the tendency of the development of renewable energy. These reasons combined with the research strategy of Vietnam National University, Ho Chi Minh City, of creation of strong and good research groups, LNT has established its research group focusing on the domain of solar cell.
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Group Activity
The research activity of our group contain two main branches of technology for solar cell fabrication (i) based on diffusion of P on a p-type silicon wafer and (ii) based on thin film P.I.N. structure. The advantages of diffusion technology is high efficiency (more than 15%), and allow us to better understand the formation of junction p-n. The diffusion technology is widely used in photovoltaic industry because of its simplicity in batch process and the development of silicon wafer fabrication. The fact of mastering this technology will establish the strong bases for further research activities on solar cell.
The silicon thin film technology has an advantage of reducing the price of solar cell/solar panel with a cost of smaller energy conversion efficiency. It allows us to fabricate solar cell on larger surfaces, and not only on cheap glass materials but also on metals and on flexible polymer substrates. We start from plasma PECVD properties studies in order to understand precisely which plasma, corresponded to which experimental conditions, gives the best solar cell performance. Our research is focused on plasma under conditions that can lead to the deposition of nano-structured thin silicon films. These latter has some quantum confinement effects providing an advantage when being used in the intrinsic layer of the P.I.N. structure. The main scope of this research activity is the ability to produce thin film silicon solar cell with about 9% of efficiency, with home-made well-controlled plasma fabrication process.
The first granted fund of our group is an aide of Ho Chi Minh City community. Under this grant, we will perform research on diffusion technology that has to lead us to the demonstration of 1m2 of mono-crystal silicon solar cell. We are working hard in order to get more research fund from other organizations for reaching the state-of-the-art silicon based solar cells/panels, which is best suited for Vietnamese market demands with specific local conditions.
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