Influence of the electron donor properties of hypericin on its sensitizing ability in DSSCs
Само за регистроване кориснике
2019
Аутори
Cvetanovic-Zobenica, Katarina
Lačnjevac, Uroš

Etinski, Mihajlo

Vasiljević-Radović, Dana

Stanisavljev, Dragomir

Чланак у часопису (Објављена верзија)

Метаподаци
Приказ свих података о документуАпстракт
Rising 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.
Кључне речи:
dye sensitized solar cell / electrochemical impedance spectroscopy / DFT calculation / photovoltaic / natural pigmentИзвор:
Photochemical & Photobiological Sciences, 2019, 18, 8, 2023-2030Издавач:
- Royal Soc Chemistry, Cambridge
Финансирање / пројекти:
- Микро, нано-системи и сензори за примену у електропривреди, процесној индустрији и заштити животне средине (RS-32008)
- Динамика нелинеарних физичкохемијских и биохемијских система са моделирањем и предвиђањем њихових понашања под неравнотежним условима (RS-172015)
DOI: 10.1039/c9pp00188c
ISSN: 1474-905X
PubMed: 31290525
WoS: 000482331500013
Scopus: 2-s2.0-85070437985
Институција/група
Institut za multidisciplinarna istraživanjaTY - JOUR AU - Cvetanovic-Zobenica, Katarina AU - Lačnjevac, Uroš AU - Etinski, Mihajlo AU - Vasiljević-Radović, Dana AU - Stanisavljev, Dragomir PY - 2019 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/1256 AB - Rising 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. PB - Royal Soc Chemistry, Cambridge T2 - Photochemical & Photobiological Sciences T1 - Influence of the electron donor properties of hypericin on its sensitizing ability in DSSCs EP - 2030 IS - 8 SP - 2023 VL - 18 DO - 10.1039/c9pp00188c ER -
@article{ author = "Cvetanovic-Zobenica, Katarina and Lačnjevac, Uroš and Etinski, Mihajlo and Vasiljević-Radović, Dana and Stanisavljev, Dragomir", year = "2019", abstract = "Rising 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.", publisher = "Royal Soc Chemistry, Cambridge", journal = "Photochemical & Photobiological Sciences", title = "Influence of the electron donor properties of hypericin on its sensitizing ability in DSSCs", pages = "2030-2023", number = "8", volume = "18", doi = "10.1039/c9pp00188c" }
Cvetanovic-Zobenica, K., Lačnjevac, U., Etinski, M., Vasiljević-Radović, D.,& Stanisavljev, D.. (2019). Influence of the electron donor properties of hypericin on its sensitizing ability in DSSCs. in Photochemical & Photobiological Sciences Royal Soc Chemistry, Cambridge., 18(8), 2023-2030. https://doi.org/10.1039/c9pp00188c
Cvetanovic-Zobenica K, Lačnjevac U, Etinski M, Vasiljević-Radović D, Stanisavljev D. Influence of the electron donor properties of hypericin on its sensitizing ability in DSSCs. in Photochemical & Photobiological Sciences. 2019;18(8):2023-2030. doi:10.1039/c9pp00188c .
Cvetanovic-Zobenica, Katarina, Lačnjevac, Uroš, Etinski, Mihajlo, Vasiljević-Radović, Dana, Stanisavljev, Dragomir, "Influence of the electron donor properties of hypericin on its sensitizing ability in DSSCs" in Photochemical & Photobiological Sciences, 18, no. 8 (2019):2023-2030, https://doi.org/10.1039/c9pp00188c . .