Micropatterned Arrays of ZnSe Nanospheres as Antireflection Coatings

作     者：Florence, S. Sasi Sachan, Priyanka Gupta, Raju Kumar John, Rita Mahalingam, Umadevi 

作者机构：Mother Teresa Womens Univ Dept Phys Kodaikanal 624101 Tamil Nadu India Indian Inst Technol Dept Chem Engn Kanpur 208016 Uttar Pradesh India Indian Inst Technol DST Unit Nanosci Kanpur 208016 Uttar Pradesh India Univ Madras Dept Theoret Phys Madras 600005 Tamil Nadu India 

出 版 物：《AUSTRALIAN JOURNAL OF CHEMISTRY》 (澳大利亚化学杂志)

年 卷 期：2014年第67卷第10期

页      面：1427-1433页

核心收录：

学科分类：07[理学] 0703[理学-化学] 

基　　金：DST government of India 

主　　题：ZINC selenide ANTIREFLECTIVE coatings MICROARRAY technology POLYSTYRENE GOLD catalysts PHOTOLUMINESCENCE X-ray diffraction 

摘      要：In this work, we demonstrate deposition of micro-arrays of ZnSe nanospheres on Si (100) substrate using simple thermal evaporation on a self-assembled sacrificial polystyrene (PS) mask. The results have been compared with the deposition on unpatterned gold catalyst- and SU-8 (negative photoresist)-coated Si substrates. The deposited ZnSe nanospheres properties were characterised by X-ray diffraction, atomic force microscopy (AFM), scanning electron microscopy (SEM), Raman, photoluminescence, and UV-vis spectroscopies. The X-ray diffraction patterns of the films exhibited reflection corresponding to the cubic (111) phase and showed polycrystallinity with a cubic (zinc blende) structure. The SEM and AFM images indicated that the particles were well dispersed and spherical in shape. The micro-arrays of ZnSe nanospheres on a self-assembled sacrificial PS mask showed excellent structural, morphological, and optical properties and demonstrated its usage in photovoltaic devices as an improved superior antireflective coating. The reflectance of the micro-arrays of ZnSe nanospheres on a self-assembled sacrificial PS mask decreased to nearly half of that of the ZnSe nanospheres fabricated on Au- and SU-8-coated Si substrates in the range of 300-800nm. Due to the well aligned and patterned surfaces, these noble textured ZnSe nanospheres may be suitable for low cost, large area photovoltaic devices and other antireflection applications.