A5048743642- Silicon and Solar Cell Technologies
- Thin-Film Transistor Technologies
- Semiconductor materials and interfaces
- Advanced Surface Polishing Techniques
- solar cell performance optimization
- Photovoltaic Systems and Sustainability
- Handwritten Text Recognition Techniques
- Extraction and Separation Processes
- Advancements in Semiconductor Devices and Circuit Design
- Human Motion and Animation
- Metallurgical Processes and Thermodynamics
- Integrated Circuits and Semiconductor Failure Analysis
- Silicon Nanostructures and Photoluminescence
- Environmental Impact and Sustainability
- Electron and X-Ray Spectroscopy Techniques
- Image Processing and 3D Reconstruction
- Advanced MEMS and NEMS Technologies
- Photovoltaic System Optimization Techniques
- Molten salt chemistry and electrochemical processes
- Advancements in Photolithography Techniques
- Microfluidic and Capillary Electrophoresis Applications
RENA Technologies (Germany)
2022-2024
Fraunhofer Institute for Solar Energy Systems
2015-2020
Fraunhofer Society
2010-2012
This work gives an overview on different technological solutions for polysilicon removal in industrial tunnel oxide passivated contact (i-TOPCon) n -type silicon solar cell fabrication. The of parasitically deposited poly-Si layers the front and edges is a mandatory requirement low reverse bias junction leakage current ( I rev ). A study wafer level shows (i) that efficient surface layer before etching crucial to achieve short times (ii) additive KOH solution enhances selectivity between...
The performance of PERC solar cells benefits from a smooth rear surface due to reduced recombination and increased light trapping. State the art roughness is defined solely by polishing silicon removal. However initial texture height can vary, therefore there no universal definition roughness. In this work parameters an earlier study will be used determine mono-crystalline industrial p-type [1]. effects side on passivation quality thus minority carrier lifetime discussed. Additionally...
This work highlights present research and mass production results of wet‐chemical solutions for industrial edge isolation silicon solar cells, aiming a reduction nitric acid consumption costs as well simultaneous increase in efficiency. All processes are applied to either industrially passivated emitter rear contact (PERC) or tunnel oxide‐passivated (TOPCon) cells. Herein, review different techniques the history cell processing is presented. Subsequently, novel approaches focused on, namely...
Realizing narrow contact fingers with low lateral resistance is a major goal for the front-side metallization of silicon solar cells. The formation screen- or stencil-printed governed by variety influencing factors. One these factors surface roughness textured wafer. However, only few investigations have been carried out to investigate this impact in detail. In study, influence arithmetical mean R <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...
A specific material flow model and a TCO for PERC (Passivated Emitter Rear Cell) solar cell factory with production capacity of 5 GWp/a was set up. The first step to collect validate data the factory. In second analysis all processes involving water treatment wastewater streams applied. With these two potential circular strategies, (i) reuse low contaminated (LCR) (ii) Minimal Liquid Discharge (MLD) approach are proposed. economic environmental performance both strategies assessed by...
Silicon Heterojunction (SHJ) solar cells represent a key technology to approach very high conversion efficiencies close the theoretical limit of silicon cells. The main advantages SHJ are lean production chain with low temperature processes and passivating hetero-structure contact which simultaneously fulfils passivation contacting role. For an improved smooth low-defect concentration surface is required. This paper focuses on new simple, cost effective production-feasible ozone-based...
Silicon Heterojunction (SHJ) solar cells represent a key technology to approach very high conversion efficiencies close the theoretical limit of silicon cells. The main advantages SHJ are lean production chain with low temperature processes and carrier selective hetero-structure for excellent passivation. This paper focuses on implementation partially new, alternative, cost effective production-feasible process steps as ozone-based cleaning, inline PECVD screen printing in enabling up 22.7%.
In microelectromechanical system manufacturing and especially in the photovoltaic industry, wet-chemical baths are used for surface structuring, conditioning, cleaning. Ozone-based cleaning processes show, addition to of silicon wafers, ancillary effect intended material etch back. Previous studies observed inhomogeneities over wafer occurring during ozone-based wet chemical process. Since a detailed observation process basin is not possible, simulations carried out understand what causes...
The measurement of bulk lifetime values as-cut wafers is a problematic issue. In this work, MDPLinescan tool was directly integrated in the last stage an inline wet chemistry tool. It shown that running through bath 5% HF solution with transportation speed 1m/min without rinsing will increase effective value from 2µs to more than 100µs. Consequently, it possible forecast at later stages leading approach for early quality control. Multicrystalline revealed best correlation average prediction...
To enable a concentration control in the acidic texturing process we have closed feedback loop from analytical data to dosing mechanism of used tool. In order analyze bath near-infrared spectroscopy an online setup as well ion chromatography inline method second approach. Using developed algorithm allows optimization HF and HNO3 dependence Si concentrations. This further leads more homogeneous results.