| Summary: | 碩士 === 國立清華大學 === 工業工程與工程管理學系碩士在職專班 === 106 === Recently, the issue of global warming has been constantly discussed in summits of major industrial countries and in countries with strong economy, where one of the important policy directions is to use alternative energy sources, especially the solar energy. The sunshine is the most convenient and cleanest energy source. Therefore, countries such as the United States / Europe (Led by Germany) / Japan that achieved early development of solar energy technology have long listed solar energy as one of the basic energy sources. China and Taiwan, the two largest manufacturing sites of solar cells and modules in the world, delivered the largest shipments, accounting for approximately 60% and 30%, respectively, of global shipments of solar cells and modules.
In recent 2-3 years, industries and research units have found that the most significant factor affecting a solar power system is the Potential Induced Degradation (PID), especially for silicon polycrystalline solar cells. For the worst case, the PID problem could reduce power generation by over 50% or even cause the entire power station to be scrapped. Therefore, all parties have conducted an investigation on this issue to find the solution.
In this study, an ozone oxide layer was deposited in a polycrystalline solar cell structure, where a layer of oxide film was placed between the electrode emitter and a SiN-based anti-reflection layer, and double layer anti-reflection coatings were used, with each coating having different refractive indices. The experimental data were analyzed with the assistance of the Neural network and Genetic algorithm which suggested that an appropriate ozone concentration in the process and a higher refractive index of an anti-reflection coating were likely to stabilize the degradation, which further enhanced the quality and the anti-PID capability of the silicon poly-crystalline solar cells and modules.
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