{"id":10083,"date":"2018-09-26T16:00:00","date_gmt":"2018-09-26T16:00:00","guid":{"rendered":"https:\/\/v4.pv-tech.org\/technical-papers\/towards-the-next-generation-of-highefficiency-cuingase2-thinfilm-solar-cells-sharc25\/"},"modified":"2023-07-28T16:42:00","modified_gmt":"2023-07-28T16:42:00","slug":"towards-the-next-generation-of-highefficiency-cuingase2-thinfilm-solar-cells-sharc25","status":"publish","type":"technical-papers","link":"https:\/\/www.pv-tech.org\/technical-papers\/towards-the-next-generation-of-highefficiency-cuingase2-thinfilm-solar-cells-sharc25\/","title":{"rendered":"Towards the next generation of highefficiency Cu(In,Ga)Se2 thin&#45;film solar cells \u2013 Sharc25"},"content":{"rendered":"<p>By Wolfram Witte; Philip Jackson; Stephan Buecheler; Romain Carron; Susanne Siebentritt; Florian Werner; S\u00e9bastien Duguay; Arantxa Vilalta&#45;Clemente; Roberto Menozzi; Giovanna Sozzi; Emilie Bourgeois; Giedrius Degutis; Marcus B\u00e4r; Thomas Kunze; Sascha Sadewasser; Nicoleta Nicoara; Martti J. Puska; Maria Malitckaya; Ayodhya Nath Tiwari<\/p>\n<p>The EU Horizon Sharc25 project has provided deep insights into highly efficient Cu(In,Ga)Se2 (CIGSe) thin&#45;film solar cells fabricated by lowand high&#45;temperature co&#45;evaporation using advanced characterization methods, analytical tools, device simulation, and density functional theory modelling. This complementary approach led to a continuous knowledgedriven development and improvement of the CIGSe absorber. Based on optimized chemical composition, profiles, and alkali metal post&#45;deposition treatments (PDT) using KF, RbF, and CsF, the CIGSe cell efficiency could be substantially increased to a record value of 22.6%. Due to additional modifications at the absorber\/emitter (replacement of standard buffer system by a combination of thin CdS and TiO2) and back contact\/ absorber (introduction of Al back reflector in combination with InZnO diffusion barrier) interfaces, in particular the short&#45;circuit current could be increased. Furthermore, passivation layers in combination with point contact schemes at the CIGSe front and back side were developed and are still under investigation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The EU Horizon Sharc25 project has provided deep insights into highly efficient Cu(In,Ga)Se2 (CIGSe) thin&#45;film solar cells fabricated by lowand high&#45;temperature co&#45;evaporation using advanced characterization methods, analytical tools, device simulation, and density functional theory modelling. This complementary approach led to a continuous knowledgedriven development and improvement of the CIGSe absorber. Based on optimized chemical composition, profiles, and alkali metal post&#45;deposition treatments (PDT) using KF, RbF, and CsF, the CIGSe cell efficiency could be substantially increased to a record value of 22.6%. Due to additional modifications at the absorber\/emitter (replacement of standard buffer system by a combination of thin CdS and TiO2) and back contact\/ absorber (introduction of Al back reflector in combination with InZnO diffusion barrier) interfaces, in particular the short&#45;circuit current could be increased. Furthermore, passivation layers in combination with point contact schemes at the CIGSe front and back side were developed and are still under investigation.<\/p>\n","protected":false},"author":1,"featured_media":28043,"template":"","paywall-tags":[8671],"technical-papers-categories":[2921,2930],"class_list":["post-10083","technical-papers","type-technical-papers","status-publish","has-post-thumbnail","hentry","paywall-tags-premium","technical-papers-categories-photovoltaics-international-papers","technical-papers-categories-thin-film"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.5 (Yoast SEO v25.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Towards the next generation of highefficiency Cu(In,Ga)Se2 thin&#045;film solar cells \u2013 Sharc25 - PV Tech<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.pv-tech.org\/technical-papers\/towards-the-next-generation-of-highefficiency-cuingase2-thinfilm-solar-cells-sharc25\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Towards the next generation of highefficiency Cu(In,Ga)Se2 thin&#045;film solar cells \u2013 Sharc25\" \/>\n<meta property=\"og:description\" content=\"The EU Horizon Sharc25 project has provided deep insights into highly efficient Cu(In,Ga)Se2 (CIGSe) thin&#045;film solar cells fabricated by lowand high&#045;temperature co&#045;evaporation using advanced characterization methods, analytical tools, device simulation, and density functional theory modelling. This complementary approach led to a continuous knowledgedriven development and improvement of the CIGSe absorber. Based on optimized chemical composition, profiles, and alkali metal post&#045;deposition treatments (PDT) using KF, RbF, and CsF, the CIGSe cell efficiency could be substantially increased to a record value of 22.6%. Due to additional modifications at the absorber\/emitter (replacement of standard buffer system by a combination of thin CdS and TiO2) and back contact\/ absorber (introduction of Al back reflector in combination with InZnO diffusion barrier) interfaces, in particular the short&#045;circuit current could be increased. 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