Sökning: onr:"swepub:oai:DiVA.org:uu-360490" >
Copper Complexes wi...
Copper Complexes with Tetradentate Ligands for Enhanced Charge Transport in Dye-Sensitized Solar Cells
-
- Michaels, Hannes (författare)
- Uppsala universitet,Fysikalisk kemi
-
- Benesperi, Iacopo (författare)
- Uppsala universitet,Fysikalisk kemi
-
- Edvinsson, Tomas, 1970- (författare)
- Uppsala universitet,Fasta tillståndets fysik
-
visa fler...
-
- Munoz-Garcia, Ana Belen (författare)
- Univ Naples Federico II, Dept Phys Ettore Pancini, I-80126 Naples, Italy
-
- Pavone, Michele (författare)
- Univ Naples Federico II, Dept Chem Sci, I-80126 Naples, Italy
-
- Boschloo, Gerrit (författare)
- Uppsala universitet,Fysikalisk kemi,Uppsala Univ, Dept Chem, Angstrom Lab, POB 523, SE-75120 Uppsala, Sweden
-
- Freitag, Marina (författare)
- Uppsala universitet,Fysikalisk kemi
-
visa färre...
-
(creator_code:org_t)
- 2018-05-21
- 2018
- Engelska.
-
Ingår i: Inorganics. - : MDPI AG. - 2304-6740. ; 6:2
- Relaterad länk:
-
https://doi.org/10.3...
-
visa fler...
-
https://uu.diva-port... (primary) (Raw object)
-
https://www.mdpi.com...
-
https://urn.kb.se/re...
-
https://doi.org/10.3...
-
visa färre...
Abstract
Ämnesord
Stäng
- In dye-sensitized solar cells (DSCs), the redox mediator is responsible for the regeneration of the oxidized dye and for the hole transport towards the cathode. Here, we introduce new copper complexes with tetradentate 6,6-bis(4-(S)-isopropyl-2-oxazolinyl)-2,2-bipyridine ligands, Cu(oxabpy), as redox mediators. Copper coordination complexes with a square-planar geometry show low reorganization energies and thus introduce smaller losses in photovoltage. Slow recombination kinetics of excited electrons between the TiO2 and Cu-II(oxabpy) species lead to an exceptionally long electron lifetime, a high Fermi level in the TiO2, and a high photovoltage of 920 mV with photocurrents of 10 mA.cm(-2) and 6.2% power conversion efficiency. Meanwhile, a large driving force remains for the dye regeneration of the Y123 dye with high efficiencies. The square-planar Cu(oxabpy) complexes yield viscous gel-like solutions. The unique charge transport characteristics are attributed to a superposition of diffusion and electronic conduction. An enhancement in charge transport performance of 70% despite the higher viscosity is observed upon comparison of Cu(oxabpy) to the previously reported Cu(tmby)(2) redox electrolyte.
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Nyckelord
- dye-sensitized solar cell
- solar cell
- copper complex
- redox mediator
- electrolyte
- tetradentate
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas