Mai, Chi-LunMoehl, ThomasHsieh, Chi-HungDecoppet, Jean-DavidZakeeruddin, Shaik M.Graetzel, MichaelYeh, Chen-Yu2015-09-282015-09-282015-09-28201510.1021/acsami.5b03783https://infoscience.epfl.ch/handle/20.500.14299/118931WOS:000358395200053Three novel efficient donor-acceptor porphyrins, MH1-MH3, with a pyridine-type acceptor and anchoring group were synthesized and their optical, electrochemical, and photovoltaic properties investigated. Replacing the commonly used 4-carboxyphenyl anchoring group with 2-carboxypyridine, 2-pyridone, and pyridine did not significantly change the absorption and electrochemical properties of the porphyrin dyes. These new porphyrin dyes MH show power conversion efficiencies of 8.3%, 8.5%, and 8.2%, which are comparable to that of the benchmark YD2-o-C8 (eta = 8.25%) under similar conditions. It was demonstrated that 2-carboxypyridine is an efficient and stable anchoring group as MH1 and showed better cell performance and long-term stability than YD2-o-C8 under light soaking conditions.porphyrin2-carboxypyridine2-pyridonepyridinedye-sensitized solar celltext::journal::journal article::research article