论文标题
分级带式薄膜藻类太阳能电池的光电优化
Optoelectronic optimization of graded-bandgap thin-film AlGaAs solar cells
论文作者
论文摘要
对含有（i）具有分级带隙的N-AlgaAs吸收层的藻类太阳能电池进行了光电优化，（ii）（ii）定期波纹的Ag反射器与局部的ohmic PD-GE-GE-AU背心相结合。吸收层的带隙会通过正弦或线性变化。 2000 nm厚的N-AlgaAs吸收层的效率为33.1％，与层次的带隙以及银反向反射器和局部欧姆反向接触预测，相比之下，均质的效率为27.4％，均具有均匀的效率，并且具有均匀的带隙和连续的颜料背性。带隙的正弦分级{预计将提高}最大效率为34.5％。因此，对吸收层的带隙以及定期波纹的AG反射器和局部化的欧姆PD-GE-AU反向接触进行分级，可以帮助实现用于陆生应用的超薄和高效藻类太阳能电池。
An optoelectronic optimization was carried out for an AlGaAs solar cell containing (i) an n-AlGaAs absorber layer with a graded bandgap and (ii) a periodically corrugated Ag backreflector combined with localized ohmic Pd-Ge-Au backcontacts. The bandgap of the absorber layer was varied either sinusoidally or linearly. An efficiency of 33.1% with the 2000-nm-thick n-AlGaAs absorber layer is predicted with linearly graded bandgap along with silver backreflector and localized ohmic backcontacts, in comparison to 27.4% efficiency obtained with homogeneous bandgap and a continuous ohmic backcontact. Sinusoidal grading of the bandgap {is predicted to enhance} the maximum efficiency to 34.5%. Thus, grading the bandgap of the absorber layer, along with a periodically corrugated Ag backreflector and localized ohmic Pd-Ge-Au backcontacts can help realize ultrathin and high-efficient AlGaAs solar cells for terrestrial applications.
