| Photovoltaic (PV) electricity generation hasn’t been applied in large-scale because the cost is much higher than that of the conventional power generation such as hydroelectric and thermal power generation. In order to reduce the cost of PV electricity generation, people have proposed many solutions. Luminescent solar concentrators (LSCs) are considered as an important way to decrease the cost of PV electricity generation, since the usage of expensive PV cells can be reduced significantly. Although a substantial progress in the LSC research has been made over the past decades, the road to LSCs commercialization is still deeply hindered by many practical problems. This dissertation did a series of fabrication of large-scale LSC and characterization of the fluorescence stability, power conversion efficiency (PCE), waveguide loss and discussion on building-integrated photovoltaic (BIPV) application of LSC. The dissertation is consisted of the following four chapters.The first chapter is the literature review of the background and the latest research progresses of related works. Firstly, the overall situation and the importance of photovoltaic technology is described, including the developing history and working principle of the solar cells as well as the present situation of solar photovoltaic system. Then, the development and the latest research progresses of concentrating photovoltaic are introduced. Finally, the developing history and present study of LSC are reviewed. According to the above work, we illustrate the research contents and the scientific problems that we will deal with.The second chapter is the fabrication of glass laminated luminescent solar concentrators (GL-LSCs). The test shows that the mixed fluorescent dyes Red305and Yellow083exhibit wide absorption spectrum. The fluorescent film was sandwiched between two pieces of glasses to isolate the film from air and water vapor, which effectively improve the stability of the fluorescent materials. The7.8x7.8cm2,15.6×15.6cm2GL-LSC were fabricated, and the PCE was measured under the standard conditions to be about3.0%and2.3%, respectively. The accelerated aging test also shows that GL-LSC has better stability than conventional LSC.The third chapter is the fabrication of large-size LSCs. The large-size GL-LSCs of31.2x31.2cm2and61×122cm2were fabricated. With the size increase, the output power of the GL-LSCs increases, but the PCE decreases rapidly due to the transport losses and re-absorption of luminescent materials. To increase the PCE, four bottom-mounted PV cells luminescent solar concentrators (BMP-LSCs) of61x122cm2were fabricated. A masking experiment shown that the gain increases with the luminescent waveguide area, but the increasing speed decreases rapidly. By comparing the performance of the four BMP-LSCs with15.6x2.0cm2,15.6×1.0cm2,12.5r2.0cm2and12.5×1.0cm2silicon solar cells, it is found that pursuing high gain or high PCE does not result in an overall cost effectiveness. Among the four devices, the BMP-LSC with12.5r2.0cm2bottom-mounted PV cells yields the highest performance price ratio of$1.25/Wp with PV cell coverage of9.07%. In order to facilitate outdoor application, the fabricated BMP-LSCs were placed on a homemade stainless steel bracket which can adjust the tilt angles to optimize the output power. The outdoor performance of BMP-LSC stand-alone PV system was evaluated under the clear sky conditions.The fourth chapter is the summary and prospect. |
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