Quinoxaline-Based Dual Donor, Dual Acceptor Organic Dyes for Dye-Sensitized Solar Cells

Autor: Hammad Cheema, Louis E. McNamara, Jared H. Delcamp, Adithya Peddapuram, Yanbing Zhang, Nathan I. Hammer
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Materials science
dye energetics
010402 general chemistry
Photochemistry
01 natural sciences
7. Clean energy
lcsh:Technology
Fluorescence spectroscopy
lcsh:Chemistry
Electron transfer
chemistry.chemical_compound
Quinoxaline
chromophore
General Materials Science
dye-sensitized solar cells
Instrumentation
lcsh:QH301-705.5
organic dyes
density functional theory
Fluid Flow and Transfer Processes
010405 organic chemistry
lcsh:T
Process Chemistry and Technology
General Engineering
molecular engineering
Chromophore
fluorescence spectroscopy
Acceptor
lcsh:QC1-999
0104 chemical sciences
3. Good health
Computer Science Applications
Dye-sensitized solar cell
photovoltaics
chemistry
lcsh:Biology (General)
lcsh:QD1-999
lcsh:TA1-2040
Density functional theory
Cyclic voltammetry
lcsh:Engineering (General). Civil engineering (General)
lcsh:Physics
Zdroj: Applied Sciences
Volume 8
Issue 9
Applied Sciences, Vol 8, Iss 9, p 1421 (2018)
ISSN: 2076-3417
DOI: 10.3390/app8091421
Popis: A novel metal-free quinoxaline-based molecular framework with a dual donor and dual acceptor (DD-&pi
AA) motif has been introduced. Four sensitizers (AP6, AP8, AP9, and AP12) have been synthesized and fully characterized via UV&ndash
Vis absorption, cyclic voltammetry, density functional theory (DFT) calculations, time-correlated single photon counting (TCSPC), and in dye-sensitized solar cell (DSC) devices. Structural modifications to both the donor and acceptor/anchor regions were evaluated via structure&ndash
property relationships without altering the quinoxaline &pi
bridge. Through careful dye design, a broadly absorbing near-infrared (NIR) sensitizer extending electricity production to 800 nm is realized in DSC devices. Ground- and excited-state oxidation potentials were measured to show energetically favorable charge transfer events. Importantly, the dye structure was found to have a strong influence on dye energetics in different environments with structural elements allowing for either similar or dramatically different solution versus film measurements. The DSC device electrolyte was also found to have a significant influence on dye energetics as well. Electron transfer events were probed for each dye with DSC device measurements and with TCSPC studies. The results are correlated to the dye structures.
Databáze: OpenAIRE
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