Optimization of a-SiGe:H Alloy Composition for Stable Solar Cells
Optimization of a-SiGe:H Alloy Composition for Stable Solar Cells
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用于稳定太阳能电池的 a-SiGe:H 合金成分优化
DOI：
10.1143/jjap.34.1741
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发表时间：
1995
影响因子：
1.5
通讯作者：
Shinya Tsuda Shinya Tsuda
中科院分区：
文献类型：
--
作者：
A. Terakawa;M. Shima;K. Sayama;H. Tarui;H. Nishiwaki;Shinya Tsuda Shinya Tsuda
本文系统地研究了非晶SiGe：H（a-SiGe：H）样品的薄膜特性和太阳能电池性能。结果发现，氢含量和成键构型在决定初始性质和稳定性方面起着重要作用。最佳组合物被澄清为最小的Urbach尾特征能量和缺陷密度的沉积膜中，并为太阳能电池的最大转换效率。随着光伏层中氢含量的降低，a-SiGe单层和a-Si/a-SiGe叠层太阳电池的稳定性提高。结果，光均热后的最佳成分向较低氢含量的区域移动。将上述发现应用于器件设计，在红光（λ>650 nm）下，a-SiGe单结太阳能电池的最高稳定转换效率为3.3%（初始为3.7%），a-Si/a-SiGe叠层太阳能电池的最高稳定转换效率为10.6%（初始为11.6%）（面积：1 cm 2）。
The film properties and solar cell performance of amorphous SiGe:H (a-SiGe:H) samples have been systematically investigated, using constant optical gap and various compositions of hydrogen and germanium. It was found that the hydrogen content and bonding configurations play important roles in determining both the initial properties and stability. The optimum compositions were clarified for the minimum Urbach tail characteristic energy and defect density in the as-deposited film, and for the maximum conversion efficiency of the solar cells. The stability of a-SiGe single and a-Si/a-SiGe tandem solar cells becomes higher as the hydrogen content of the photovoltaic layer becomes lower. As a result, the optimum composition after light soaking shifts to the region of lower hydrogen content. Applying the above findings to the design of devices, the highest stabilized conversion efficiencies of 3.3% (initial 3.7%) under red light (λ>650 nm) for an a-SiGe single-junction solar cell and 10.6% (initial 11.6%) for an a-Si/a-SiGe tandem solar cell have been achieved (area: 1 cm2).