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Molecular engineering of D-A-pi-A sensitizers for highly efficient solid-state dye-sensitized solar cells
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi. KTH, Skolan för kemivetenskap (CHE), Centra, Molekylär elektronik, CMD.
KTH, Skolan för kemivetenskap (CHE), Kemi, Tillämpad fysikalisk kemi.ORCID-id: 0000-0001-5069-3245
Vise andre og tillknytning
2017 (engelsk)Inngår i: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 5, nr 7, s. 3157-3166Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Two newquinoxaline-based D-A-pi-A organic sensitizers AQ309 and AQ310 have been designed and synthesized employing 3,4-ethylenedioxythiophene (EDOT) and cyclopentadithiophene (CPDT) as plinker units, respectively. The new AQ309 and AQ310 dyes have been applied in all-solid-state dye-sensitized solar cells (ssDSSCs). An impressive record photoelectric conversion efficiency (PCE) of 8.0% for AQ310-based ssDSSCs using Spiro-OMeTAD as the hole transport material (HTM) was obtained under standard AM 1.5 (100 mW cm (2)) solar intensity. This clearly outperforms the PCE of the state-of-theart organic D-pi-A dye LEG4-based devices showing a PCE of 7.3% under the same conditions. Moreover, an excellent high PCE of 8.6% was also recorded for AQ310-based devices under 50% solar intensity. Meanwhile, the AQ310-based ssDSSCs showed a much longer electron lifetime according to the transient photovoltage decay measurement, demonstrating lower charge recombination losses in the devices. Photo-induced absorption spectroscopy (PIA) indicated that AQ310 could be more efficiently regenerated by Spiro-OMeTAD. These results show that molecular engineering is a promising strategy to develop D-A-pi-A organic sensitizers for highly efficient ssDSSCs.

sted, utgiver, år, opplag, sider
RSC Publishing, 2017. Vol. 5, nr 7, s. 3157-3166
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Identifikatorer
URN: urn:nbn:se:kth:diva-204124DOI: 10.1039/c6ta10673kISI: 000395077600010Scopus ID: 2-s2.0-85013119863OAI: oai:DiVA.org:kth-204124DiVA, id: diva2:1085181
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QC 20170328

Tilgjengelig fra: 2017-03-28 Laget: 2017-03-28 Sist oppdatert: 2017-05-19bibliografisk kontrollert

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