...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Physics >Light trapping efficiency of periodic and quasiperiodic back-reflectors for thin film solar cells: A comparative study
【24h】

Light trapping efficiency of periodic and quasiperiodic back-reflectors for thin film solar cells: A comparative study

机译：薄膜太阳能电池的周期性和准周期性背反射器的光捕获效率：比较研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Recently, great efforts have been carried out to design optimized metallic nano-grating back-reflectors to improve the light absorption in thin film solar cells. In this work, we compare the performances of deterministic aperiodic backreflectors in the form of 1-D nanogratings based on the generalized Fibonacci deterministic aperiodic sequence with a standard periodic one. The case of study here analyzed relies on a realistic solar cell model, where light absorption is evaluated only in the intrinsic region of an amorphous silicon P-I-N junction. We found that the results of comparison are strongly influenced by the amorphous silicon extinction coefficient within the near-infrared wavelength range, where most photonic-plasmonic modes (responsible for the light absorption enhancement typically observed when structured metal nanogratings are employed) are excited. In particular, with device-grade hydrogenated amorphous silicon, we demonstrate that Fibonacci-like backreflectors are able to provide an absorption enhancement of about 4% and 20% with respect to periodic and flat metallic backreflectors, respectively. We also found that aperiodic gratings guarantee better results in terms of robustness to the incident angle of the incoming radiation. Overall, our results confirm that aperiodic geometries are effectively able to offer some intriguing perspectives to enhance light trapping capability in thin film solar cells especially thanks to the large set of patterns employable to enable a proper design of resonant modes number and their spectral locations.
机译：近来，已经进行了巨大的努力来设计优化的金属纳米光栅背反射器，以改善薄膜太阳能电池中的光吸收。在这项工作中，我们比较了基于广义Fibonacci确定性非周期序列与标准周期性周期的一维纳米光栅形式的确定性非周期后向反射器的性能。这里分析的研究案例依赖于实际的太阳能电池模型，其中仅在非晶硅P-I-N结的本征区域中评估光吸收。我们发现，比较结果受到近红外波长范围内非晶硅消光系数的强烈影响，在该波长范围内，大多数光子-等离子体模式（负责使用结构化金属纳米光栅时通常观察到的光吸收增强）被激发。尤其是，对于器件级氢化非晶硅，我们证明了像斐波那契那样的后向反射镜能够分别提供相对于周期性和平坦的金属后向反射镜约4％和20％的吸收增强。我们还发现，非周期性光栅在对入射辐射的入射角的鲁棒性方面保证了更好的结果。总体而言，我们的结果证实，非周期性几何形状能够有效地提供一些令人感兴趣的观点，以增强薄膜太阳能电池的光捕获能力，尤其是由于采用了可用于正确设计谐振模数及其光谱位置的大量图案。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号