کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5428527 | 1508682 | 2014 | 10 صفحه PDF | دانلود رایگان |
- The absorption enhancement of four nanostructure arrays is investigated by RCWA.
- An identical optimal lattice constant is found for different nanostructures.
- Square nanowire arrays are first studied for their potentials in photovoltaic applications.
- It has been found that the efficiency increases when the incident angle is very small.
The optical absorption of four square arrays of crystalline silicon nanostructures, i.e., circular nanowire array, circular nanohole arrays, square nanowire arrays, and square nanohole arrays, are numerically investigated. The method of rigorous coupled-wave analysis (RCWA) is employed to calculate the absorptivity for the arrays with lattice constant from 100Â nm to 1500Â nm. The results indicated that the lattice constant is the foremost structural parameter to determine the ultimate efficiency, and the peaks of ultimate efficiencies for the four different nanostructures always appear around the lattice constant of 600Â nm. It demonstrates that square nanowire arrays and circular nanohole arrays have great potentials for photovoltaic applications with high ultimate efficiencies and low filling ratios. Moreover, high ultimate efficiencies of all structures can be maintained over a large range of incident angles.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 133, January 2014, Pages 579-588