溫度、濕熱及電極密度對聚光型太陽電池轉換效率影響之研究

洪慧芬

doi:10.6843/NTHU.2014.00105

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溫度、濕熱及電極密度對聚光型太陽電池轉換效率影響之研究

Influence of Temperature, Damp Heat and Metal Grid Density on Energy Conversion Efficiency of Concentration Solar Cells

洪慧芬 , Ph.D　　Advisor：黃倉秀　　

繁體中文 DOI： 10.6843/NTHU.2014.00105

步階式應力加速老化試驗；溫度應力；濕熱應力；聚光型太陽電池；金屬電極；戶外測試； step stress accelerated degradation test ； temperature stress ； damp heat ； concentration solar cells ； metal grid ； outdoor test

Abstract │ Reference (46) │ Times Cited (11) │ Altmetrics

Abstract 〈TOP〉

Parallel Abstract 〈TOP〉

The object of this dissertation is to study the influences of temperature stress, damp heat stress and metal grid density on the energy conversion efficiency of InGaP/InGaAs/Ge multi-junction concentration solar cells. In the reliability studies, step stress accelerated degradation tests were employed to investigate the degradation of cell. In order to accelerate the observation of degradation, solar cell were not encapsulated with protective silicone layer. In the temperature stress studies, the dark and light current-voltage measurements indicated that recombination current increased, open circuit voltage decreased and energy conversion efficiency decreased. These results were caused by defects generated in the peripheral region of solar cells. In the damp heat stress studies, experimental results indicated that cracks generated at Ge substrate in the edge region of solar cell, which induced leakage path and failure of solar cell.
Under light concentration condition of solar cell, more metallic electrodes can rapidly collect current and thus generate more current; however more denser electrode will also decrease the light collection area of cell. This dissertation employs a theoretical model to analyze the influence of the grid density of linear metallic grid on the electro-optical characteristics of concentration solar cells. These results were compared with outdoor experimentally measured data in order to provide the basic references for optimal designation of cell. It is found that the total power loss was dominated by grid shadowing effect at lower concentration levels, while there existed an optimal condition for compromise between grid shadowing effect and resistance of metal lines at higher concentration levels.

Reference ( 46 ) 〈TOP〉

[3] N. V. Yastrebova, “High-efficiency multi-junction solar cells: Current status and future potential”, Centre for Research in Photonics, University of Ottawa, 2007.
連結：
[6] C. M. Fetzer, X. Q. Liu, J. Chang, W. Hong, A. Palmer, D. Bhusari, B. Jun, M. Lau, H. Lee, J. Cryst. Growth 352 (2011) 181-185.
連結：
[9] G. S. Kinsey, P. Pien, P. Hebert, R. A. Sherif, Solar Energy Mater. Solar Cells 93 (2009) 950-951.
連結：
[12] D. Macdonald, A. Cuevas, F. Ferrazza, Solid-State Electronics 43 (1999) 575-581.
連結：
[13] I. Rey-Stolle, C. Algora, 17th European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC), 2001, 2223-2226.
連結：

Times Cited (11) 〈TOP〉

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