光学学报, 2015, 35 (10): 1016001, 网络出版: 2015-10-08  

优化分析宽带透射的铜网孔阵列透明电极

Optimizations and Analysis of Broadband Transmission Through Copper Mesh Arrays for Transparent Electrodes
作者单位
1 巢湖学院机械与电子工程学院, 安徽 合肥 238000
2 兰州理工大学理学院, 甘肃 兰州 730050
3 四川大学物理科学与技术学院, 四川 成都 610064
摘要
基于有限时域差分(FDTD)算法优化一类宽带光学透射的金属网格透明电极。设计的Ag、Au 和Cu 网格阵列在可见光(Vis)波段的透射率约70%,近红外(NIR)波段的透射率约90%。为提高透明电极的效费比和工艺兼容性,选择Cu作为电极材料,并分析封装材料、Cu纳米带表面粗糙度和工艺误差对透射率的影响。结果表明采用高折射率封装材料和增加Cu纳米带的表面粗糙度可以分别增加NIR 和Vis波段的透射率,减小NIR 波段频带宽度;增加铜纳米带的误差宽度会降低Vis-NIR 波段透射特性和减小NIR 波段的频带宽度。在封装材料折射率不高于1.5,铜纳米带的表面均方根粗糙度不超过8 nm 和误差宽度不超过20 nm 时,优化的Cu网格阵列在Vis-NIR 波段有较好的透射特性,可作为透明电极应用到光电器件。
Abstract
A kind of transparent electrodes with broadband transmission are optimized using the finte different time domain (FDTD) algorithm.The transmissions of the designed Ag, Au and Cu mesh arrays are all about 70% in visible (Vis) band and 90% in near-infrared (NIR) band. In order to improve effectiveness-cost and technology compatibility of transparent electrodes, Cu is a suitable candidate. The effects of packaging materials, roughnesses and error widths of Cu nanostripes are analyzed.The results show that with the increasing refraction indices of packaging materials and roughnesses of Cu nanostripes, the transmissions increase in NIR band and Vis band, respectively, and the NIR bandwidths decrease. As the error widths of Cu nanostripes increase, the transmission properties in Vis-NIR band reduce and NIR bandwidths decrease. The transmissions are high in Vis and NIR bands as the refraction index of packaging material, room mean square of roughness and error width of Cu nanostripes are lower than 1.5, 8 and 20 nm, respectively. The conclusions are helpful for developing transparent electrode of photoelectric devices with broadband transmission.

叶松, 余建立, 王向贤, 张志友, 杜惊雷. 优化分析宽带透射的铜网孔阵列透明电极[J]. 光学学报, 2015, 35(10): 1016001. Ye Song, Yu Jianli, Wang Xiangxian, Zhang Zhiyou, Du Jinglei. Optimizations and Analysis of Broadband Transmission Through Copper Mesh Arrays for Transparent Electrodes[J]. Acta Optica Sinica, 2015, 35(10): 1016001.

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