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dc.creatorCvetanovic-Zobenica, Katarina
dc.creatorLačnjevac, Uroš
dc.creatorEtinski, Mihajlo
dc.creatorVasiljević-Radović, Dana
dc.creatorStanisavljev, Dragomir
dc.date.accessioned2022-04-05T15:22:17Z
dc.date.available2022-04-05T15:22:17Z
dc.date.issued2019
dc.identifier.issn1474-905X
dc.identifier.urihttp://rimsi.imsi.bg.ac.rs/handle/123456789/1256
dc.description.abstractRising demands for renewable energy sources have led to the development of dye sensitized solar cells. It is a challenge to find a good and low cost sensitizer, which has a low environmental impact. In this work, we conducted spectroscopic and electrochemical experiments, as well as quantum-chemical calculations of the natural pigment hypericin, in order to provide insight into its sensitizing efficiency. To this end, three identical cells were made and characterized. Although this pigment exhibited good adsorption onto a semiconductor surface, a high molar absorption coefficient (43700 L mol(-1) cm(-1)) and favorable alignment of energy levels and provided a long lifetime of electrons (17.8 ms) in the TiO2 photoanode, it was found that the efficiency of hypericin-sensitized solar cells was very low, only 0.0245%. We suggest that this inefficiency originated from a low injection of electrons into the conduction band of TiO2. This conclusion is supported by the density functional theory calculations which revealed a low electron density in the anchoring groups of electronically excited hypericin. The results of this work could be valuable not only in the photovoltaic aspect, but also for application of hypericin in medicine in photodynamic therapy.en
dc.publisherRoyal Soc Chemistry, Cambridge
dc.relationinfo:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/32008/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172015/RS//
dc.rightsrestrictedAccess
dc.sourcePhotochemical & Photobiological Sciences
dc.subjectdye sensitized solar cell
dc.subjectelectrochemical impedance spectroscopy
dc.subjectDFT calculation
dc.subjectphotovoltaic
dc.subjectnatural pigment
dc.titleInfluence of the electron donor properties of hypericin on its sensitizing ability in DSSCsen
dc.typearticle
dc.rights.licenseARR
dc.citation.epage2030
dc.citation.issue8
dc.citation.other18(8): 2023-2030
dc.citation.rankM22
dc.citation.spage2023
dc.citation.volume18
dc.identifier.doi10.1039/c9pp00188c
dc.identifier.pmid31290525
dc.identifier.scopus2-s2.0-85070437985
dc.identifier.wos000482331500013
dc.type.versionpublishedVersion


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Приказ основних података о документу