Influence of the electron donor properties of hypericin on its sensitizing ability in DSSCs
Само за регистроване кориснике
2019
Аутори
Cvetanović Zobenica, KatarinaLačnjevac, 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 (43 700 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:
hypericin / dye sensitized solar cells / TiO2Извор:
Photochemical & Photobiological Sciences, 2019, 18, 8, 2023-2030Издавач:
- Royal Society of Chemistry
Финансирање / пројекти:
- Микро, нано-системи и сензори за примену у електропривреди, процесној индустрији и заштити животне средине (RS-MESTD-Technological Development (TD or TR)-32008)
- Динамика нелинеарних физичкохемијских и биохемијских система са моделирањем и предвиђањем њихових понашања под неравнотежним условима (RS-MESTD-Basic Research (BR or ON)-172015)
DOI: 10.1039/c9pp00118b
ISSN: 1474-905X; 1474-9092
PubMed: 31290525
WoS: 000482331500013
Scopus: 2-s2.0-85070537135
Институција/група
IHTMTY - JOUR AU - Cvetanović Zobenica, Katarina AU - Lačnjevac, Uroš AU - Etinski, Mihajlo AU - Vasiljević-Radović, Dana AU - Stanisavljev, Dragomir PY - 2019 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/3213 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 (43 700 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 Society of Chemistry T2 - Photochemical & Photobiological Sciences T1 - Influence of the electron donor properties of hypericin on its sensitizing ability in DSSCs VL - 18 IS - 8 SP - 2023 EP - 2030 DO - 10.1039/c9pp00118b ER -
@article{ author = "Cvetanović 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 (43 700 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 Society of Chemistry", journal = "Photochemical & Photobiological Sciences", title = "Influence of the electron donor properties of hypericin on its sensitizing ability in DSSCs", volume = "18", number = "8", pages = "2023-2030", doi = "10.1039/c9pp00118b" }
Cvetanović 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 Society of Chemistry., 18(8), 2023-2030. https://doi.org/10.1039/c9pp00118b
Cvetanović 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/c9pp00118b .
Cvetanović 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/c9pp00118b . .