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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/16100
標題: | 矽晶圓太陽能電池最佳化及銅銦鎵硒薄膜均勻度分析 Wafer-based Solar Cell Optimization and Study on CIGS Film Inhomogeneity |
作者: | Seow-Wei Tan 陳曉微 |
指導教授: | 劉致為 |
關鍵字: | 矽,銅銦鎵硒,太陽能電池,最佳化,不均勻度, Silicon,CIGS,solar cell,optimization,non uniformity, |
出版年 : | 2012 |
學位: | 碩士 |
摘要: | Harnessing clean energy is no doubt an important evolution to rely less on gas, coal and petroleum energy. In this thesis, the focus on solar energy, particularly in the Silicon based crystalline solar cell and CIGS solar cell.
A silicon wafer solar cell is optimized with reference to a high efficiency cell. Using the same implant and annealing condition, the doping profile of both front and rear surface field is match against their respective SIMS profiles. From there, the I-V curve, EQE and reflectance curves of both measured and simulation results are compared and the unknown parameters are optimized. The resistance of a solar cell’s metal contact is critical to reduce output voltage loss. Therefore, the minimum thickness of metal required to minimize loss is calculated. This value varies for different material with different resistivity. Using the optimized parameters, the solar cell is then further improved in terms of light trapping mechanism, wafer thickness optimization, and adding selective front emitter. All these methods will give rise in terms of its short circuit current density, open circuit voltage, fill factor and/or efficiency. The non uniformity of a Silicon based solar cell is also investigated to further understand how non uniformity degrades a solar cell’s performance. Lastly, film inhomogeneity of CIGS solar cell is given an in-depth study. The non uniformity issues within a cell and also between cells are looked into. Besides lifetime and doping uniformity issues, CIGS has also another critical parameter which is the [Ga]/[In+Ga] mole fraction. Also, we realize the non uniformity within and between cells have different degradation pattern due to their equivalent circuit. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/16100 |
全文授權: | 未授權 |
顯示於系所單位: | 電子工程學研究所 |
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