Structure of Diethyl-Phosphonic Acid Anchoring Group Affects the Charge-Separated State on an Iridium(III) Complex Functionalized NiO Surface

Wahyuono RA, Amthor S, Müller C, Rau S, Dietzek B (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Chemphotochem Wiley

Book Volume: 4

Pages Range: 618-629

Journal Issue: 8

DOI: 10.1002/cptc.202000038

Abstract

Cyclometalated Iridium(III) complexes, i. e. [Ir(C N)2(dppz)][PF6], bearing either two or four -CH2PO(OH)2 anchoring groups (IrP2dppz or IrP4dppz) are explored as photosensitizers for p-type dye sensitized solar cell (DSSC). The synthetic route is described and the iridium(III) complexes are characterized with respect to their electrochemical and photophysical properties. The modified anchoring ligand geometry exploited in this work not only alters the electronic nature of the complex (that is by destabilizing the LUMO energetically) but more importantly improves the grafting ability of the complex towards the NiO surface. The photoinduced long-lived charge separated state (CSS) at the NiO|IrPxdppz interface is of a different nature comparing the two complexes. For IrP2dppz and IrP4dppz the electron density of the CSS dominantly resides on the dppz and the C N ligand, respectively. The stability of the CSS can be correlated to the solar cell performance in NiO-based p-DSSCs, which yield conversion efficiencies which are among the highest in the class of iridium(III) complexes developed for p-DSSCs.

Authors with CRIS profile

Carolin Müller

Involved external institutions

Friedrich-Schiller-Universität Jena DE Germany (DE) Leibniz-Institut für Photonische Technologien e.V. DE Germany (DE) Universität Ulm DE Germany (DE)

How to cite

APA:

Wahyuono, R.A., Amthor, S., Müller, C., Rau, S., & Dietzek, B. (2020). Structure of Diethyl-Phosphonic Acid Anchoring Group Affects the Charge-Separated State on an Iridium(III) Complex Functionalized NiO Surface. Chemphotochem, 4(8), 618-629. https://doi.org/10.1002/cptc.202000038

MLA:

Wahyuono, Ruri Agung, et al. "Structure of Diethyl-Phosphonic Acid Anchoring Group Affects the Charge-Separated State on an Iridium(III) Complex Functionalized NiO Surface." Chemphotochem 4.8 (2020): 618-629.

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