Bauch Martin, Dimopoulos Theodoros, Trassl Stephan
Photovoltaic Systems, AIT-Austrian Institute of Technology, Giefinggasse 4, A-1210 Vienna, Austria.
Nanotechnology. 2019 Jun 28;30(26):265201. doi: 10.1088/1361-6528/ab0d39. Epub 2019 Mar 6.
A nanostructured transparent electrode with high average visible transmittance of 76%, low sheet resistance of 7.0 Ω/sq and steep transmittance drop in the near-infrared (NIR) range is investigated by simulations and experiments. The electrode is composed of a nanostructured substrate, on which a trilayer, consisting of an ultrathin 14 nm thick silver film embedded between thin films of TiO and Al-doped ZnO, is deposited. Directional silver deposition results in the formation of a disk-hole array without additional lift-off or etching steps. While the trilayer approach enables increased visible transmittance, the transmittance in the NIR regime is decreased by a broadband plasmonic dipole excitation in the disk-hole array. Moreover, a rich mode spectrum of weaker multipole surface plasmon excitations is observed in the nanodisk- and nanohole array. The presented electrode holds great potential for applications in optoelectronic devices, solar control coatings and solar cells.
通过模拟和实验研究了一种纳米结构透明电极，其具有76%的高平均可见光透射率、7.0Ω/sq的低方块电阻以及在近红外（NIR）范围内陡峭的透射率下降。该电极由纳米结构衬底组成，在其上沉积了一个三层结构，该三层结构由嵌入TiO薄膜和掺铝ZnO薄膜之间的14nm厚超薄银膜组成。定向银沉积导致形成盘孔阵列，无需额外的剥离或蚀刻步骤。虽然三层结构方法能够提高可见光透射率，但盘孔阵列中的宽带等离子体偶极激发会降低近红外区域的透射率。此外，在纳米盘和纳米孔阵列中观察到了较弱的多极表面等离子体激发的丰富模式光谱。所提出的电极在光电器件、太阳能控制涂层和太阳能电池应用中具有巨大潜力。
