Dewan Rahul, Marinkovic Marko, Noriega Rodrigo, Phadke Sujay, Salleo Alberto, Knipp Dietmar
School of Engineering and Science, Electronic Devices and Nanophotonics Laboratory, Jacobs University Bremen, 28759 Bremen, Germany.
Opt Express. 2009 Dec 7;17(25):23058-65. doi: 10.1364/OE.17.023058.
The influence of nano textured front contacts on the optical wave propagation within microcrystalline thin-film silicon solar cell was investigated. Periodic triangular gratings were integrated in solar cells and the influence of the profile dimensions on the quantum efficiency and the short circuit current was studied. A Finite Difference Time Domain approach was used to rigorously solve the Maxwell's equations in two dimensions. By studying the influence of the period and height of the triangular profile, the design of the structures were optimized to achieve higher short circuit currents and quantum efficiencies. Enhancement of the short circuit current in the blue part of the spectrum is achieved for small triangular periods (P<200 nm), whereas the short circuit current in the red and infrared part of the spectrum is increased for triangular periods (P = 900nm) comparable to the optical wavelength. The influence of the surface texture on the solar cell performance will be discussed.
研究了纳米纹理化前接触对微晶硅薄膜太阳能电池内光波传播的影响。在太阳能电池中集成了周期性三角形光栅，并研究了轮廓尺寸对量子效率和短路电流的影响。采用时域有限差分法在二维空间中严格求解麦克斯韦方程组。通过研究三角形轮廓的周期和高度的影响，对结构进行了优化设计，以实现更高的短路电流和量子效率。对于小三角形周期（P<200 nm），光谱蓝色部分的短路电流得到增强，而对于与光波长相当的三角形周期（P = 900nm），光谱红色和红外部分的短路电流增加。将讨论表面纹理对太阳能电池性能的影响。
