Linker Length-Dependent Electron-Injection Dynamics of Trimesitylporphyrins on SnO2 Films

Lee, Shin Hee; Regan, Kevin P.; Hedström, Svante; Matula, Adam J.; Chaudhuri, Subhajyoti; Crabtree, Robert H.; Batista, Victor S.; Schmuttenmaer, Charles A.; Brudvig, Gary W.

doi:10.1021/acs.jpcc.7b07855

Linker Length-Dependent Electron-Injection Dynamics of Trimesitylporphyrins on SnO₂ Films

Journal Article · Thu Sep 21 00:00:00 EDT 2017 · Journal of Physical Chemistry. C

DOI:https://doi.org/10.1021/acs.jpcc.7b07855· OSTI ID:1483383

Lee, Shin Hee ^[1]; ^[1]; ^[2]; Matula, Adam J. ^[1]; Chaudhuri, Subhajyoti ^[1]; ^[1]; ^[1]; ^[1]; ^[1]

Yale Univ., New Haven, CT (United States). Dept. of Chemistry, and Yale Energy Sciences Inst.
Yale Univ., New Haven, CT (United States). Dept. of Chemistry, and Yale Energy Sciences Inst.; Stockholm Univ. (Sweden). Dept. of Physics

Electron-injection dynamics of dye-sensitized photoelectrochemical cells depend on the length of the linker connecting the molecular photosensitizer to the metal oxide electron acceptor. However, systematic studies of the effect of chromophore–oxide distance are scarce. In this work, we present the synthesis, characterization, spectroscopy, and computational modeling of electron-injection dynamics from free-base trimesitylporphyrins with varying linker lengths into tin(IV) oxide (SnO₂). In each system, the porphyrin core and metal oxide film remain the same while only the linker binding the porphyrin to the carboxylate anchor group is varied. A length range spanning 8.5–17.2 Å is studied by employing phenylene, biphenylene, terphenylene, and benzanilide groups as the linker. We find a clear correlation between linker length and injection rates, providing insights that will be exploited in the optimization of dye-sensitized photoelectrochemical cells.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: FG02-07ER15909

OSTI ID:: 1483383

Journal Information:: Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 41 Vol. 121; ISSN 1932-7447

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
density functional theory
electron injection
terahertz spectroscopy
trimesitylporphyrins