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首页> 外文期刊>International Journal of Photoenergy >Enhanced Efficiencies for High-Concentration, Multijunction PV Systems by Optimizing Grid Spacing under Nonuniform Illumination
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Enhanced Efficiencies for High-Concentration, Multijunction PV Systems by Optimizing Grid Spacing under Nonuniform Illumination

机译：通过优化非均匀照明下的网格间距，提高高浓度，多结光伏系统的效率

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摘要

The design of a triple junction solar cell's front contact grid can significantly affect cell conversion efficiency under high concentration. We consider one aspect of grid design, choosing a linear grid within a distributed resistance cell model to optimize finger spacings at concentrations between 500 and 2500 suns under uniform and nonuniform illumination. Optimization for maximum efficiency under Gaussian irradiance profiles is done by SPICE analysis. Relative to the optimized uniform illumination designs, we find enhancements of 0.5% to 2% in absolute efficiencies for uniform spacing. Efficiency enhancement with nonuniform spacing under nonuniform illumination is also evaluated. Our model suggests that, at lower concentrations (<1000 suns), the penalty for using uniformly spaced fingers instead of nonuniformly spaced fingers is <0.1%. However, at a concentration of 2500 suns the penalty increases to 0.3%. Thus, relative to a uniform irradiance optimization, an absolute efficiency increase of 2.3% can be attained for an optimized nonuniform spacing given the Gaussian irradiance profile under consideration.
机译：三结太阳能电池的前接触栅的设计会在高浓度下显着影响电池转换效率。我们考虑网格设计的一个方面，在分布式电阻单元模型中选择线性网格，以在均匀和不均匀光照下优化500和2500个太阳之间的浓度下的手指间距。通过SPICE分析完成了高斯辐照度曲线下最大效率的优化。相对于优化的均匀照明设计，我们发现均匀间距的绝对效率提高了0.5％至2％。还评估了在不均匀照明下具有不均匀间距的效率增强。我们的模型表明，在较低的浓度下（<1000个太阳），使用均匀间隔的手指而不是不均匀间隔的手指的惩罚为<0.1％。但是，在2500太阳的浓度下，惩罚增加到0.3％。因此，相对于均匀的辐照度优化，考虑到高斯辐照度分布，对于优化的非均匀间距，可以实现2.3％的绝对效率提高。

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