High-Efficiency Multi-Crystalline Silicon Solar Cells Using Screen-Printed Electrode and Wet Etching Textured Surface

2006 ◽  
Author(s):  
Satoshi Okamoto ◽  
Rui Mikami ◽  
Ryo Ozaki ◽  
Yoshiroh Takaba ◽  
Hiroshi Taniguchi ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Crystalline Silicon ◽  
Wet Etching ◽  
Silicon Solar Cells ◽  
Textured Surface ◽  
Screen Printed Electrode ◽  
Crystalline Silicon Solar Cells ◽  
Screen Printed

scholarly journals Simulation-based roadmap for the integration of poly-silicon on oxide contacts into screen-printed crystalline silicon solar cells

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Christian N. Kruse ◽  
Sören Schäfer ◽  
Felix Haase ◽  
Verena Mertens ◽  
Henning Schulte-Huxel ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Crystalline Silicon ◽  
Silicon Solar Cells ◽  
Efficiency Gain ◽  
Reference Case ◽  
Crystalline Silicon Solar Cells ◽  
Simulation Based ◽  
P Type ◽  
Screen Printed

AbstractWe present a simulation-based study for identifying promising cell structures, which integrate poly-Si on oxide junctions into industrial crystalline silicon solar cells. The simulations use best-case measured input parameters to determine efficiency potentials. We also discuss the main challenges of industrially processing these structures. We find that structures based on p-type wafers in which the phosphorus diffusion is replaced by an n-type poly-Si on oxide junction (POLO) in combination with the conventional screen-printed and fired Al contacts show a high efficiency potential. The efficiency gains in comparsion to the 23.7% efficiency simulated for the PERC reference case are 1.0% for the POLO BJ (back junction) structure and 1.8% for the POLO IBC (interdigitated back contact) structure. The POLO BJ and the POLO IBC cells can be processed with lean process flows, which are built on major steps of the PERC process such as the screen-printed Al contacts and the $$\text{Al}_\text{2 }\text{O}_\text{3 }/\text{SiN }$$ Al 2 O 3 / SiN passivation. Cell concepts with contacts using poly-Si for both polarities ($$\text{POLO}^2$$ POLO 2 -concepts) show an even higher efficiency gain potential of 1.3% for a $$\text{POLO}^2$$ POLO 2 BJ cell and 2.2% for a $$\text{POLO}^2$$ POLO 2 IBC cell in comparison to PERC. For these structures further research on poly-Si structuring and screen-printing on p-type poly-Si is necessary.

scholarly journals Lithium Fluoride Based Electron Contacts for High Efficiency n-Type Crystalline Silicon Solar Cells

2016 ◽  
Vol 6 (14) ◽  
pp. 1600241 ◽  
Author(s):  
James Bullock ◽  
Peiting Zheng ◽  
Quentin Jeangros ◽  
Mahmut Tosun ◽  
Mark Hettick ◽  
...  
Keyword(s):  
Solar Cells ◽  
Lithium Fluoride ◽  
High Efficiency ◽  
Crystalline Silicon ◽  
Silicon Solar Cells ◽  
Crystalline Silicon Solar Cells

scholarly journals A Low Resistance Calcium/Reduced Titania Passivated Contact for High Efficiency Crystalline Silicon Solar Cells

2017 ◽  
Vol 7 (12) ◽  
pp. 1602606 ◽  
Author(s):  
Thomas G. Allen ◽  
James Bullock ◽  
Quentin Jeangros ◽  
Christian Samundsett ◽  
Yimao Wan ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Crystalline Silicon ◽  
Silicon Solar Cells ◽  
Crystalline Silicon Solar Cells ◽  
Low Resistance

‘Just-Clean-Enough’: Optimization of Wet Chemical Cleaning Processes for Crystalline Silicon Solar Cells

2016 ◽  
Vol 255 ◽  
pp. 344-347 ◽  
Author(s):  
Michael Haslinger ◽  
M. Soha ◽  
S. Robert ◽  
M. Claes ◽  
Paul W. Mertens ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Crystalline Silicon ◽  
Silicon Solar Cells ◽  
Semiconductor Surface ◽  
Cleaning Process ◽  
Chemical Cleaning ◽  
Crystalline Silicon Solar Cells ◽  
Metal Impurities ◽  
Wet Chemical

Advanced concepts for photovoltaic silicon solar cells, especially high-efficiency n-type solar cells, requires appropriate wet cleaning treatment in order to remove metallic contamination prior to high temperature processes like diffusion and passivation [1]. The cost of the cleaning process should be as low as possible that requires an optimized usage of the chemicals by increasing process tank lifetimes and developing dedicated feed and bleed recipes. The just clean enough concept has been developed to fulfil the needs of PV industry to minimize the consumption of chemicals. When the dominant contamination metal is identified in quality and quantity, a dedicated wet chemical cleaning process can be applied to remove the metal concentration from the semiconductor surface under a specified limit with the minimum volume on cleaning solution. The paper describes how to optimize a dedicated wet cleaning process for prominent metal impurities like Fe, Cu, Cr, Ti, Co and Zn. For each metal an exchange volume is determined to develop a feed and bleed recipe. The accumulation of the metal impurities in the process tank is calculated and process tank lifetimes are predicted.

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