Supramolecular Hemicage Cobalt Mediators for Dye-Sensitized Solar Cells.

ABSTRACT: A new class of dye-sensitized solar cells (DSSCs) using the hemicage cobalt-based mediator [Co(ttb)]^2+/3+ with the highly preorganized hexadentate ligand 5,5'',5''''-((2,4,6-triethyl benzene-1,3,5-triyl)tris(ethane-2,1-diyl))tri-2,2'-bipyridine (ttb) has been fully investigated. The performances of DSSCs sensitized with organic D-π-A dyes utilizing either [Co(ttb)]^2+/3+ or the conventional [Co(bpy)₃ ]^2+/3+ (bpy=2,2'-bipyridine) redox mediator are comparable under 1000 W m^-2 AM 1.5 G illumination. However, the hemicage complexes exhibit exceptional stability under thermal and light stress. In particular, a 120-hour continuous light illumination stability test for DSSCs using [Co(ttb)]^2+/3+ resulted in a 10 % increase in the p

SUBMITTER: Freitag M 

PROVIDER: S-EPMC5305181 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature