Efficient and long-term stable organic vacuum deposited tandem solar cells

Conference item

We report on the latest progress in the field of organic p-i-n tandem solar cells. The external quantum efficiencies of a tandem solar cell with two complementary absorbing bulk heterojunctions with an efficiency of 6.07% (certified by Fraunhofer ISE) with an active area of about 2cm² is analyzed. These solar cells are extremely stable: a reduction of only 3% of its initial power conversion efficiency was measured when stored at 85°C for 5000 hours. The solar cell does not show any reduction in efficiency when stored under continuous illumination of a tungsten lamp corresponding to 1.5 suns for 5000 hours. Furthermore, we present the latest results on optimized tandem solar cells showing a power conversion efficiency of 7.66 % (certified by Fraunhofer ISE, active area of 1.1cm²). © 2010 SPIE.

Authors: Uhrich, C; Schwartz, G; Maennig, B; Gnehr, WM; Sonntag, S

• Publication status: Published
• Peer review status: Reviewed (other)
• Publisher: Society of Photo-Optical Instrumentation Engineers
• Host title: Proceedings of SPIE - The International Society for Optical Engineering
• Volume: 7722
• Publication date: 2010-01-01
• DOI: 10.1117/12.855088
• ISSN: 0277-786X
• ISBN: 9780819481955
• Language: English
• Keywords: organic tandem solar cell; lifetime; power conversion efficiency; vacuum deposition