Session Index

Thin functional coatings are the key to new and superior products in nearly all industrial branches. The most flexible and widely used technology for the deposition of thin films are plasma processes. These technologies are the first choice for an enormous bandwidth of materials and functions to be realized. The talk will give an overview of functional coatings with recent applications and will focus on the available process technologies for thin film deposition ranging from well established PVD processes like DC magnetron sputtering and PACVD to new and specialized technologies like atmospheric pressure plasma processes or gas flow sputtering and hot topic technologies of highly ionised pulse plasma processes (HIPIMS). -Transparent conductive oxides TCOs are of major importance in photovoltaics or displays and can be deposited by reactive magnetron sputtering. Photo induced Hydrophilicity and photocatalytic decomposition of organic material can be achieved by coatings with crystalline TiO2. Design and manufacturing of complex optical filters will be demonstrated using a new Optics Coating Plant technology as well as investigating antireflective coatings and materials. Targeted surface functionalization or coating can be achieved by means of atmospheric pressure plasma processes.

 

A 3D simulation is performed for the interdigitated back contact silicon heterojunction (IBC-SHJ) solar cells to optimize the geometry and the front surface field (FSF) doping concentration. After optimized, the IBC-SHJ solar cell has 24% conversion efficiency.

 

This study demonstrates performance-enhancements of silicon solar cells using an up-conversion (UC) layer comprising YF3:Yb3+,Er3+ phosphors and silver (Ag) reflector on back-side of silicon solar cells. The efficiency-enhancements of 13.26% and 14.34% were obtained for the cells with a UC-layer and with UC+Ag layers, respectively, compared to the reference cell.

 

Our previous method for texturing diamond wire sawn multicrystalline silicon wafers is modified here. In this new method, the chemical for the first step treatment is replaced by an isotopic etching solution of HF/HNO3 mixture to process the wafers, and proves to be indispensable.

 

In this work, we demonstrate the unique engineering plastic substrates with high-resolution, micrometer-scaled silver meshes can achieve superior optical transmittance and low sheet resistance. By comparing various process conditions, we achieve a power conversion efficiency of 9.5% on 2x2 cm2 hybrid organic - silicon solar cell mini-modules.