Eve Krassowski, S. Großer, M. Turek, A. Henning, Hongming Zhao
{"title":"Investigation of monocrystalline p-type PERC cells featuring the laser enhanced contact optimization process and new LECO paste","authors":"Eve Krassowski, S. Großer, M. Turek, A. Henning, Hongming Zhao","doi":"10.1063/5.0056380","DOIUrl":"https://doi.org/10.1063/5.0056380","url":null,"abstract":"Screen-printed metal-semiconductor contacts as the mainstream-metallization of industrially produced silicon solar cells are currently a major topic in research, as they still show high potential for cell efficiency improvement. The Laser Enhanced Contact Optimization (LECO) process developed by the CE Cell Engineering GmbH enables the generation of a new contact structure that is capable of generating low ohmic metal-semiconductor contacts while preserving the contact passivation. In this study, we investigate the impact of the LECO process on monocrystalline p-type PERC solar cells that feature a front side metallization paste that was especially developed for the LECO process. As highlight from this investigation, a gain in short circuit current can be reported, additionally to a previously reported gain in open circuit voltage enabled by LECO.","PeriodicalId":348410,"journal":{"name":"PROCEEDINGS OF THE 9TH WORKSHOP ON METALLIZATION AND INTERCONNECTION FOR CRYSTALLINE SILICON SOLAR CELLS","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123527013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Emanuel, D. Ourinson, G. Dammass, H. Müller, C. Sternkiker, F. Ogiewa, K. Rahmanpour, T. Javaid, A. Csordás, S. Nold, S. Glunz, F. Clement
{"title":"Project “FEUERDRACHE”: Process development and control of contact firing processes for high-efficiency silicon solar cells","authors":"G. Emanuel, D. Ourinson, G. Dammass, H. Müller, C. Sternkiker, F. Ogiewa, K. Rahmanpour, T. Javaid, A. Csordás, S. Nold, S. Glunz, F. Clement","doi":"10.1063/5.0056036","DOIUrl":"https://doi.org/10.1063/5.0056036","url":null,"abstract":"Being a key technology in silicon solar cell production, the firing process conducted in infrared (IR) lamp powered conveyor belt furnaces is well established in the market. The purpose of the project FEUERDRACHE is to advance the classic firing process by raising throughput, energy efficiency and process control via increasing the process variability. To achieve the latter, an industry-oriented furnace is expanded by innovative features, which are thoroughly investigated: 1) faster belt velocity; 2) novel IR lamps; 3) thermography as an inline-capable alternative to thermocouple measurements 4) high-power laser as an alternative to a heated chamber.","PeriodicalId":348410,"journal":{"name":"PROCEEDINGS OF THE 9TH WORKSHOP ON METALLIZATION AND INTERCONNECTION FOR CRYSTALLINE SILICON SOLAR CELLS","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125348437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Erath, S. Pingel, Retno Khotimah, A. Rose, D. Eberlein, Tim Wenzel, S. Roder, A. Lorenz, F. Clement
{"title":"Fast screen printing and curing process for silicon heterojunction solar cells","authors":"D. Erath, S. Pingel, Retno Khotimah, A. Rose, D. Eberlein, Tim Wenzel, S. Roder, A. Lorenz, F. Clement","doi":"10.1063/5.0056429","DOIUrl":"https://doi.org/10.1063/5.0056429","url":null,"abstract":"Within this work, we present industrially feasible and well-applicable methods to effectively lower the costs of silicon heterojunction (SHJ) solar cell processing by reducing cycle time of the screen printing and the subsequent thermal curing step using industrial process equipment. For six out of nine tested low-temperature silver pastes, process velocity in screen printing could be doubled compared to typical printing velocity, equaling a reduction of cycle time in this process step by 1 sec. Using a convection curing process supported by infrared radiation (IR) and an adapted process temperature, curing dwell time of SHJ solar cells can be substantially reduced from 10 min to 0.5 min, allowing for higher throughput and/or smaller machine dimensioning (footprint). Furthermore, an improved solar cell conversion efficiency by up to +0.1 %abs is demonstrated which is likely to be caused by the so-called light soaking effect. When applying an additional process step with IR at high illumination density, a further increase of cell efficiency by up to +0.3 %abs can be achieved. With regard to the soldered interconnection, the combination of a short and hot curing process and their diametrical effects on adhesion properties resulted in similar peel force values as for the reference process. Also, treatment of the SHJ solar cells with a laser-based IR light soaking process does not exhibit a significant effect on peel forces. In summary, our work shows that process times of the metallization for SHJ solar cells can be strongly reduced while maintaining cell performance and applicability for soldered interconnection.","PeriodicalId":348410,"journal":{"name":"PROCEEDINGS OF THE 9TH WORKSHOP ON METALLIZATION AND INTERCONNECTION FOR CRYSTALLINE SILICON SOLAR CELLS","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131323914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Preface: 9th Workshop on Metallization and Interconnection for Crystalline Silicon Solar Cells","authors":"","doi":"10.1063/12.0005025","DOIUrl":"https://doi.org/10.1063/12.0005025","url":null,"abstract":"","PeriodicalId":348410,"journal":{"name":"PROCEEDINGS OF THE 9TH WORKSHOP ON METALLIZATION AND INTERCONNECTION FOR CRYSTALLINE SILICON SOLAR CELLS","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128368390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}