Dye-sensitized solar cells with 13% efficiency achieved through the molecular engineering of porphyrin sensitizers

Simon Mathew, Aswani Yella, Peng Gao, Robin Humphry-Baker, Basile F E Curchod, Negar Ashari-Astani, Ivano Tavernelli, Ursula Rothlisberger, Md Khaja Nazeeruddin, Michael Grätzel

Research output: Contribution to journalArticle (Academic Journal)peer-review

3262 Citations (Scopus)

Abstract

Dye-sensitized solar cells have gained widespread attention in recent years because of their low production costs, ease of fabrication and tunable optical properties, such as colour and transparency. Here, we report a molecularly engineered porphyrin dye, coded SM315, which features the prototypical structure of a donor-π-bridge-acceptor and both maximizes electrolyte compatibility and improves light-harvesting properties. Linear-response, time-dependent density functional theory was used to investigate the perturbations in the electronic structure that lead to improved light harvesting. Using SM315 with the cobalt(II/III) redox shuttle resulted in dye-sensitized solar cells that exhibit a high open-circuit voltage VOC of 0.91 V, short-circuit current density JSC of 18.1 mA cm-2, fill factor of 0.78 and a power conversion efficiency of 13%.

Original languageEnglish
Pages (from-to)242-247
Number of pages6
JournalNature Chemistry
Volume6
Issue number3
DOIs
Publication statusPublished - Mar 2014

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