Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Microengineering (IMT), Neuchâtel, Switzerland.
Nano Lett. 2011 Feb 9;11(2):661-5. doi: 10.1021/nl1037787. Epub 2010 Dec 28.
We demonstrate high-efficiency thin-film silicon solar cells with transparent nanotextured front electrodes fabricated via ultraviolet nanoimprint lithography on glass substrates. By replicating the morphology of state-of-the-art nanotextured zinc oxide front electrodes known for their exceptional light trapping properties, conversion efficiencies of up to 12.0% are achieved for micromorph tandem junction cells. Excellent light incoupling results in a remarkable summed short-circuit current density of 25.9 mA/cm(2) for amorphous top cell and microcrystalline bottom cell thicknesses of only 250 and 1100 nm, respectively. As efforts to maximize light harvesting continue, our study validates nanoimprinting as a versatile tool to investigate nanophotonic effects of a large variety of nanostructures directly on device performance.
我们通过在玻璃衬底上进行紫外纳米压印光刻，展示了高效的薄膜硅太阳能电池，其具有透明的纳米结构化前电极。通过复制具有卓越光捕获性能的最先进纳米结构化氧化锌前电极的形态，微结构串联结电池的转换效率达到了 12.0%。优异的光耦合导致非晶硅顶电池和微晶硅底电池的总短路电流密度分别达到了 25.9 mA/cm²，厚度仅为 250nm 和 1100nm。随着对最大限度地提高光捕获效率的研究的继续，我们的研究验证了纳米压印作为一种通用工具，可以直接在器件性能上研究各种纳米结构的纳米光子学效应。
