Novel improvements in the sensitizers of dye-sensitized solar cells for enhancement in efficiency-a review

Chawla, Priyanka; Tripathi, Mridula

doi:10.1002/er.3366

Cited by 27 publications

(29 citation statements)

References 93 publications

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“…On the other hand, organic dyes yield relatively high efficiency while their long‐term stability issues and complex synthesis procedures remain serious unsolved problems . Natural dyes which are extracted easily and in an eco‐friendly way from fruits, flowers, leaves, and plant roots offer promising alternatives to ruthenium complexes and organic dyes as sensitizers in DSSCs . They can be simply obtained from a variety of plants without requiring any complex synthetic routes, and they can be considered as a sustainable source for DSSCs.…”

Section: Introductionmentioning

confidence: 99%

St. Lucie cherry, yellow jasmine, and madder berries as novel natural sensitizers for dye‐sensitized solar cells

et al. 2019

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Summary Natural dyes extracted from fruits, vegetables, flowers, and leaves are considered as promising alternative sensitizers to replace synthetic dyes for dye‐sensitized solar cells (DSSCs). Generally, solar activity of natural dyes stem from anthocyanin pigment. Carbonyl, carboxyl, and hydroxyl groups present in the anthocyanin molecule improve the adsorption ability of dye on TiO2 and therefore facilitate charge transfer. Here, for the first time, novel natural dyes extracted from St. Lucie cherry, yellow jasmine, and madder berries are reported to act as sensitizer in DSSCs. These novel natural dye extracts are prepared by dissolving related fruits in ethanol. The ingredient of the dyes is identified by FT‐IR spectroscopy. Accordingly, FT‐IR spectrum reveals that novel natural dye extracts exhibit all the characteristic peaks of anthocyanin pigment. Specifically, St. Lucie cherry consists of more distinct carbonyl group than other sources. Also, photoanodes composed of three TiO2 layers are prepared by using a spin‐coating method. Then, they are immersed into natural dyes and analyzed by conducting UV‐Vis spectroscopy. Compared with bare TiO2, natural dye–loaded photoanodes demonstrate far higher absorption ability in the visible region. After fabrication of devices with different novel natural dye sensitizers, current‐voltage characteristics and electrochemical impedance spectroscopy measurements are performed. The best power conversion efficiency (PCE) of 0.19% is obtained by sensitization of St. Lucie cherry with an open‐circuit voltage (Voc) of 0.56 V, short‐circuit current density (Jsc) of 181 μA cm−2, and fill factor (FF) of 0.55. Furthermore, St. Lucie cherry–sensitized devices show the lowest charge transfer and highest recombination resistances. This result can be attributed to the obvious carbonyl group exhibited by St. Lucie cherry.

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Section: Introductionmentioning

confidence: 99%

St. Lucie cherry, yellow jasmine, and madder berries as novel natural sensitizers for dye‐sensitized solar cells

et al. 2019

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“…1). All of these molecules are dyes absorbing in the visible range, and all of them are used in photovoltaic applications [13–21]. They are also intensively studied using various surface sensitive methods.…”

Section: Reviewmentioning

confidence: 99%

Scanning probe microscopy studies on the adsorption of selected molecular dyes on titania

Prauzner‐Bechcicki¹,

Zając²,

Olszowski³

et al. 2016

Beilstein J. Nanotechnol.

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Titanium dioxide, or titania, sensitized with organic dyes is a very attractive platform for photovoltaic applications. In this context, the knowledge of properties of the titania–sensitizer junction is essential for designing efficient devices. Consequently, studies on the adsorption of organic dyes on titania surfaces and on the influence of the adsorption geometry on the energy level alignment between the substrate and an organic adsorbate are necessary. The method of choice for investigating the local environment of a single dye molecule is high-resolution scanning probe microscopy. Microscopic results combined with the outcome of common spectroscopic methods provide a better understanding of the mechanism taking place at the titania–sensitizer interface. In the following paper, we review the recent scanning probe microscopic research of a certain group of molecular assemblies on rutile titania surfaces as it pertains to dye-sensitized solar cell applications. We focus on experiments on adsorption of three types of prototypical dye molecules, i.e., perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA), phtalocyanines and porphyrins. Two interesting heteromolecular systems comprising molecules that are aligned with the given review are discussed as well.

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“…Moreover, effective photosensitive dyes should have the following characteristics: a) they should have a strong and wide absorption window for visible light; b) the ground and excited states should have high stability to ensure efficient electron transport; c) the dyes should possess the proper oxidation and reduction potentials to ensure the excited electrons of dyes can be injected into the conduction band of TiO 2 , and cationic dyes can be deoxidized by the electrolyte; d) the excited state lifetime should be long enough to ensure a very high charge transfer efficiency. So far, many types of molecules, such as porphyrin, carbazole, indoline, coumarin, triphenylamine and triarylamine, have been investigated as the dyes for DSSCs because of their higher PCE, relatively simple synthetic procedure and lower cost.…”

Section: Introductionmentioning

confidence: 99%

Tuning the Electron‐Transport and Electron‐Accepting Abilities of Dyes through Introduction of Different π‐Conjugated Bridges and Acceptors for Dye‐Sensitized Solar Cells

Sun

Song

et al. 2017

ChemPhysChem

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A series of dyes, containing thiophene and thieno[3,2-b]thiophene as π-conjugated bridging units and six kinds of groups as electron acceptors, were designed for dye-sensitized solar cells (DSSCs). The ground- and excited-state properties of the designed dyes were investigated by using density functional theory (DFT) and time-dependent DFT, respectively. Moreover, the parameters affecting the short-circuit current density and open-circuit voltage were calculated to predict the photoelectrical performance of each dye. In addition, the charge difference density was presented through a three-dimensional (3D) real-space analysis method to investigate the electron-injection mechanism in the complexes. Our results show that the longer conjugated bridge would inhibit the intramolecular charge transfer, thereby affecting the photoelectrical properties of DSSCs. Similarly, owing to the lowest chemical hardness, largest electron-accepting ability, dipole moment (μnormal ) and the change in the energy of the TiO conduction band (ΔECB ), the dye with a (E)-3-(4-(benzo[c][1,2,5]thiadiazol-4-yl)phenyl)-2-cyanoacrylic acid (TCA) acceptor group would exhibit the most significant photoelectrical properties among the designed dyes.

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Novel improvements in the sensitizers of dye-sensitized solar cells for enhancement in efficiency-a review

Cited by 27 publications

References 93 publications

St. Lucie cherry, yellow jasmine, and madder berries as novel natural sensitizers for dye‐sensitized solar cells

St. Lucie cherry, yellow jasmine, and madder berries as novel natural sensitizers for dye‐sensitized solar cells

Scanning probe microscopy studies on the adsorption of selected molecular dyes on titania

Tuning the Electron‐Transport and Electron‐Accepting Abilities of Dyes through Introduction of Different π‐Conjugated Bridges and Acceptors for Dye‐Sensitized Solar Cells

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