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Molecular Level Factors Affecting the Efficiency of Organic Chromophores for p-Type Dye Sensitized Solar Cells
- Source :
- Energies, Vol 9, Iss 1, p 33 (2016), Energies; Volume 9; Issue 1; Pages: 33
- Publication Year :
- 2016
- Publisher :
- MDPI AG, 2016.
-
Abstract
- A series of mono- and di-branched donor-π-acceptor charge-separated dyes incorporating triphenylamine as a donor and either Dalton’s or benzothiadiazole group as strong acceptors was synthesized and its fundamental properties relevant to the sensitization of nanocrystalline NiO investigated. The dyes exhibited an intense visible absorption band with a strong charge transfer character favorable to NiO sensitization, shifting the electron density from the donor to the acceptor branches. Nevertheless, the computed exciton binding energy is circa twice that of a common literature standard (P1), suggesting a more difficult charge separation. When tested in p-type dye-sensitized solar cells the dyes successfully sensitized NiO electrodes, with photocurrent densities about half than that of the reference compound. Being recombination kinetics comparable, the larger photocurrent generated by P1 agrees with the superior charge separation capability originating by its smaller exciton binding energy.
- Subjects :
- Control and Optimization
Dye
Kinetics
Energy Engineering and Power Technology
02 engineering and technology
010402 general chemistry
Photochemistry
Triphenylamine
01 natural sciences
dyes
lcsh:Technology
NO
Donor-acceptor
chemistry.chemical_compound
Electrical and Electronic Engineering
heteroaromatic
visible absorption
dipolar
donor–acceptor
triphenylamine
branched
Suzuki coupling
DFT-TDDFT
Engineering (miscellaneous)
Photocurrent
donor-acceptor
Renewable Energy, Sustainability and the Environment
lcsh:T
Non-blocking I/O
Computer Science (all)
Chromophore
021001 nanoscience & nanotechnology
Acceptor
0104 chemical sciences
Dye-sensitized solar cell
chemistry
Absorption band
0210 nano-technology
Energy (miscellaneous)
Subjects
Details
- Language :
- English
- ISSN :
- 19961073
- Volume :
- 9
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Energies
- Accession number :
- edsair.doi.dedup.....2ba02c9d542d37d8fc478aeb2ead38be