Preparation and Characterization of Micron Scale Molybdenum Metal Mesh Electrodes

• Main Author: Niklas Boenninghoff
• Other Authors: Jinn P. Chu
• Format: Others
• Language: en_US
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/46847251867632900461

碩士 === 國立臺灣科技大學 === 材料科學與工程系 === 105 === Transparent conductive oxide (TCO) electrodes find application in a wide variety of devices, like light-emitting diodes, displays and solar cells. TCOs however are not suitable for high temperature manufacturing processes like CIGS (Copper Indium Gallium Diselenide) thin film processing, which takes place at 500°C to 600°C and suffer from a number of different drawbacks. The electrode on which CIGS is deposited must be stable at these temperatures. To realize a tandem cell, both, front and back contact of a cell must be transparent. In this work a molybdenum metal mesh electrode with four pattern derivatives is presented, which are designed towards this implementation in a tandem cell setup. The electrode consists of 2 micron wide fingers arranged in an industry typical H-grid pattern and in a hexagonal shaped pattern, with each of these patterns being comprised of a derivative with and without tapered busbars. The electrode’s micro structure, crystal orientation, surface roughness, electrical properties and optical properties are investigated. The manufacturing process as well as a comparison of this works electrodes with various competing electrode types is also presented. All electrode derivatives show excellent transmittance of up to 97% within and beyond the visible spectrum while retaining acceptable sheet resistances of about 30 Ω/□.