标题: 运用奈米粒子及奈米球微影技术提升矽晶太阳能电池光补获的特性
Applying Nanoparticles and Nanosphere-Lithography to Enhance Light Harvesting of Silicon Solar Cell
作者: 黄昭凯
Huang, Chao-Kai
孙建文
Sun, Kien-Wen
应用化学系硕博士班
关键字: 太阳能电池;奈米粒子;蜂巢式结构;光转移;光散射;Solar Cell;Nanoparticles;Honeycomb Structures;Luminescent Down-Shifting;Light Scattering
公开日期: 2011
摘要: 本论文为研究矽晶太阳能电池的抗反射结构及光转移的机制。论文内容可分成三部份:(1)奈米粒子_Silica(2)奈米蜂巢式结构(3)奈米萤光粉YVO4:Bi3+:Eu3+。
(1)奈米粒子_Silica:将奈米粒子利用旋转涂布法,均匀沉积于多晶矽电池表面,并透过奈米粒子的光散射特性,进一步改量原有电池的抗反射率。经由奈米粒子的散射机制,可得到良好UV跟NIR波段的抗反射效果。当奈米粒子浓度及旋涂参数最佳化时,则电池试片可由原本的11%,增加至12.3%。
(2)奈米蜂巢式结构:利用奈米球微影技术制造氧化锌蜂巢式结构,并将此结构作落在单晶矽电池的粗糙化结构表面。发现此结构从UV到NIR皆具有良好抗反射效果。当氧化锌浓度及蜂巢式结构尺寸最佳化时,可将原有电池试片效率由15.6%增至16.6%。
(3)奈米萤光粉YVO4:Bi3+:Eu3+:将无机奈米萤光粉旋涂于单晶矽电池表面,利用其光转移机制及粒子散射特性,可成功将原有试片的短路电流密度提升4%,并将整体电池效率提高了0.7%。证实透过发光材料的光转移机制,可提升电池试片于UV波段的量子效率。
This thesis is focus on the anti-reflection and luminescent down-shifting property of silicon solar cell. The content is divided into three parts:(1) Nanoparticles_Silica (2) Nano-Honeycomb Structure Layer (3) Nano-Phosphors_YVO4:Bi3+:Eu3+.
Part one: In this study, silica nanospheres dispersed in a surfactant solution were spin-coated on commercially available silicon solar cells to form colloidal crystals on the surface. This self-assembled nanoparticle layer served as an anti-reflection (AR) layer for solar cell devices. The self-assembled layer exhibits excellent anti-reflection properties in the UV and NIR wavelength regions. We also showed that the overall conversion efficiency of polycrystalline Si solar cells coated with the silica nanospheres was increased from 11% to 12.3% when using optimized spin-coating parameters and nanoparticle concentrations.
Part two: This experiment demonstrates the process for manufacturing a ZnO honeycomb sub-wavelength structure using nanosphere lithography technology exhibiting excellent anti-reflection properties from the UV to NIR wavelength regions. This honeycomb nanostructure, combined with commercially available crystalline Si solar cells, show substantially improved conversion efficiency from 15.6% to 16.6% using optimized honeycomb sizes and precursor concentrations of ZnO. The present work develops an unsophisticated and economical technique suitable for industrial applications in producing a uniform and low-reflective texture.
Part three: The colloids of YVO4 nanoparticles on micro-textured Si surface are demonstrated to have promising potential for efficient solar spectrum utilization in crystalline Si solar cells. The solar cells showed an enhancement of 4% in short-circuit current density and approximately 0.7% in power conversion efficiency when coated with YVO4 nanoparticles. The properties of cells integrated with YVO4 nanoparticles were characterized to identify the role of YVO4 in improved light harvesting. The current experiments conclude that the colloids of YVO4 nanoparticles not only act as luminescent down-shifting centers in the ultraviolet region but also serve as an anti-reflection coating for enhancing the light absorption in the measured spectral regime.
URI: http://140.113.39.130/cdrfb3/record/nctu/#GT079625803
http://hdl.handle.net/11536/42653
显示于类别:Thesis


文件中的档案:

  1. 580301.pdf

If it is a zip file, please download the file and unzip it, then open index.html in a browser to view the full text content.