TY - JOUR T1 - High boiling point solvent-based dye solar cells pass a harsh thermal ageing test JF - Solar Energy Materials and Solar Cells Y1 - 2016 A1 - Stergiopoulos, T. A1 - A. G. Kontos A1 - Jiang, N. A1 - Milliken, D. A1 - Desilvestro, H. A1 - V. Likodimos A1 - P. Falaras AB - Dye solar cells (DSCs) have emerged as one of the most efficient third-generation photovoltaic (PV) technologies, whose commercialization is mainly hampered by the lack of sufficient long-term stability compared to conventional PV devices. In this work, it is demonstrated that solvent based DSCs using tetraglyme as a non-nitrile, high boiling point, organic solvent for the iodide/triiodide redox shuttle, can pass a harsh accelerated thermal ageing test of 3000 h light soaking followed by additional 2000 h thermal ageing at 85 °C. Electrochemical and spectroscopic analysis on thermal degradation effects revealed that a conduction band edge shift towards more negative potentials for tetraglyme-DSCs underlies the enhanced photopotential of aged cells, compensating for the thermally induced photocurrent reduction due to slight triiodide loss. The tetraglyme-based solar cells (in contrast to cells based on methoxypropionitrile-MPN) showed exceptional stability, compatible with the established IEC61646 protocol for thin film PVs, keeping ca. 90% of their initial performance under 1 sun illumination. Quite notably, the cells even increased their initial efficiency by 4% when illuminated under 0.1 sun. This is the first time in literature that such a stability record is accomplished for solvent based DSCs utilizing commercially available and cost-effective materials. © 2015 Elsevier B.V. All rights reserved. VL - 144 UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-84944257174&doi=10.1016%2fj.solmat.2015.09.052&partnerID=40&md5=0df8c762bbefa59c3f817ecb3529ca9f N1 - cited By 9 ER -