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Article

Structure and Photoelectrical Properties of Natural Photoactive Dyes for Solar Cells

by 1, 2, 3,4, 3,* and 2,*
1
Department of Applied Physics, Xi’an University of Technology, Xi’an 710054, China
2
College of Science, Northeast Forestry University, Harbin 150040, China
3
Department of Physics, Jiamusi University, Jiamusi 154001, China
4
Life Science College, Jiamusi University, Jiamusi 154007, China
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2018, 8(9), 1697; https://doi.org/10.3390/app8091697
Received: 29 July 2018 / Revised: 10 September 2018 / Accepted: 13 September 2018 / Published: 19 September 2018
A series of natural photoactive dyes, named as D1–D6 were successfully extracted from six kinds of plant leaves for solar cells. The photoelectrical properties of dyes were measured via UV-Vis absorption spectra, cyclic voltammetry as well as photovoltaic measurement. To theoretically reveal the experimental phenomena, the chlorophyll was selected as the reference dye, where the ground and excited state properties of chlorophyll were calculated via density functional theory (DFT) and time-dependent density functional theory (TD-DFT). The experimental results show that the absorption peaks of those dyes are mainly distributed in the visible light regions of 400–420 nm and 650–700 nm, which are consistent with the absorption spectrum of chlorophyll. The photoelectrical conversion efficiencies of the solar cells sensitized by the six kinds of natural dyes are in the order of D1 > D4 > D2 > D5 > D6 > D3. The dye D1 performance exhibits the highest photoelectrical conversion efficiency of 1.08% among the investigated six natural dyes, with an open circuit voltage of 0.58 V, a short-circuit current density of 2.64 mA cm−2 and a fill factor of 0.70. View Full-Text
Keywords: natural photo-active dyes; UV-Vis absorption spectra; density functional theory (DFT); Dye-sensitized solar cells (DSSCs) natural photo-active dyes; UV-Vis absorption spectra; density functional theory (DFT); Dye-sensitized solar cells (DSSCs)
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MDPI and ACS Style

Liu, Q.; Gao, N.; Liu, D.; Liu, J.; Li, Y. Structure and Photoelectrical Properties of Natural Photoactive Dyes for Solar Cells. Appl. Sci. 2018, 8, 1697. https://doi.org/10.3390/app8091697

AMA Style

Liu Q, Gao N, Liu D, Liu J, Li Y. Structure and Photoelectrical Properties of Natural Photoactive Dyes for Solar Cells. Applied Sciences. 2018; 8(9):1697. https://doi.org/10.3390/app8091697

Chicago/Turabian Style

Liu, Qian, Nan Gao, Dejiang Liu, Jinglin Liu, and Yuanzuo Li. 2018. "Structure and Photoelectrical Properties of Natural Photoactive Dyes for Solar Cells" Applied Sciences 8, no. 9: 1697. https://doi.org/10.3390/app8091697

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