Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 115, Issue 5, Pages 2592-2599Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp110482v
Keywords
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Funding
- National Science Foundation [CHE 0730053, CHE 0934450]
- Robert A. Welch Foundation [H-F-0037, F-0021, F-1018]
- China Scholarship Council
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [0934450, 741973] Funding Source: National Science Foundation
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A picoliter solution dispenser was used to fabricate photosensitizer arrays on mesoporous TiO2 electrodes. The scanning electrochemical microscopy (SECM) technique, modified by replacing the usual ultramicroelectrode (UME) with an optical fiber and using the photooxidation of iodide in acetonitrile in a photoelectrochemical (PEC) cell, was shown to be useful for the initial screening of potential PEC photosensitizers. This SECM technique allows for the rapid identification of new dyes and also can be used to investigate the synergetic effect of multiple dyes for application in dye-sensitized solar cells (DSSCs). This technique was specifically demonstrated via the synthesis and analysis of a new, bis-bithiophene functionalized porphyrin derivative, wherein the modified SECM technique was used to carry out an initial test of its PEG efficiency relative to other dyes. The PEC properties of bulk films based on this new porphyrin derivative were then investigated and the results shown to be in good agreement with those obtained using the SECM method.
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