Effects of meta or para connected organic dyes for dye-sensitized solar cell

Jiao, Yunfei; Mao, Lebao; Liu, Shuaishuai; Tan, Tianwen; Wang, Donglin; Cao, Dapeng; Mi, Baoxiu; Gao, Zhiqiang; Huang, Wei

doi:10.1016/j.dyepig.2018.05.037

Cited by 43 publications

(20 citation statements)

References 56 publications

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“…The FT‐IR spectrum consists of two regions namely functional and fingerprint. The functional region where many stretching frequencies appear is between 4000 and 1500 cm −1 , and the fingerprint region is below 1500 cm −1 and has many peaks that are difficult to assign . In Figure , the broad absorption at the wavenumber range 3580 to 3200 cm −1 arises because of stretching hydrogen bonds ascribed to the hydroxyl group (O─H) vibration of dye .…”

Section: Resultsmentioning

confidence: 99%

“…The signals in the range 2950 to 2850 cm −1 are related to the stretching vibrations of ─CH, ─CH 2 , and ─CH 3 . The peaks between 1600 and 1640 cm −1 indicate the ─C═C─ stretch alkenes and/or the benzene rings, while the band at 1717 cm −1 can be ascribed to the stretching mode of the carbonyl group (─C═O) . The band located at 1025 cm −1 can be associated with asymmetric stretching of (─C─O─C─) modes, while the band at 820 cm −1 can be assigned to the symmetric stretching mode of the aliphatic ether group.…”

Section: Resultsmentioning

confidence: 99%

“…The functional region where many stretching frequencies appear is between 4000 and 1500 cm −1 , and the fingerprint region is below 1500 cm −1 and has many peaks that are difficult to assign. [28][29][30][31][32] In Figure 2, the broad absorption at the wavenumber range 3580 to 3200 cm −1 arises because of stretching hydrogen bonds ascribed to the hydroxyl group (O─H) vibration of dye. [33][34][35] The signals in the range 2950 to 2850 cm −1 are related to the stretching vibrations of ─CH, ─CH 2 , and ─CH 3 .…”

Section: Ft-ir Measurementsmentioning

confidence: 99%

“…The peaks between 1600 and 1640 cm −1 indicate the ─C═C─ stretch alkenes and/or the benzene rings, while the band at 1717 cm −1 can be ascribed to the stretching mode of the carbonyl group (─C═O). 25,28 The band located at 1025 cm −1 can be associated with asymmetric stretching of (─C─O─C─) modes, while the band at 820 cm −1 can be assigned to the symmetric stretching mode of the aliphatic ether group. Bands at 1710 to 1660 cm −1 correspond to vibrations of carboxylic acid groups on aromatic rings, and an out-of-plane deformation band in the region is positioned at 970 to 875 cm −1 , which is of medium intensity.…”

Section: Ft-ir Measurementsmentioning

confidence: 99%

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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: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Ft-ir Measurementsmentioning

confidence: 99%

Section: Ft-ir Measurementsmentioning

confidence: 99%

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

et al. 2019

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“…Two sensitizers having CZ donor, PTZ π‐bridge, and rhodanine acetic acid as acceptor were reported by Jiao et al, 69 and in contrast, benzene π‐bridge was inserted between the CZ donor and PTZ with the para‐ or meta‐connection mode ( 6 and 5 ). DSSC devices demonstrated a 5.57% and 4.56% PCE for dye having para and meta substitution, respectively.…”

Section: Recent Developments In Cz‐based Dyesmentioning

confidence: 88%

Recent developments in metal‐free organic sensitizers derived from carbazole, triphenylamine, and phenothiazine for dye‐sensitized solar cells

et al. 2021

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Summary In the present context of increasing population, renewable and sustainable energy alternatives are very much essential to satisfy the necessities of the world. To satisfy this growing demand, scientists are prioritizing the production of cost‐effective and high‐performance clean energy appliances. Dye‐sensitized solar cells (DSSCs) are one such material that is at the forefront of modern solar cell technologies. Being one of the main components of DSSCs, metal‐free organic dyes play a crucial role in light processing and electron injection. In recent times, carbazole (CZ)‐, triphenylamine (TPA)‐, and phenothiazine (PTZ)‐based derivatives have been identified as suitable alternatives to Ru(II) polypyridyl complexes because they are easy to synthesize and exhibit excellent thermal and electronic properties. This review focuses largely on the latest developments in the use of monoanchored and multianchored CZ, TPA, and PTZ scaffolds for DSSC applications and focuses especially on the correlation between molecular design and photovoltaic performance. The physical properties of devices can be adjusted through the sensitizer's strategic design that helps to improve the performance of the devices. We tabulated the photovoltaic parameters corresponding to all dyes presented in this review. Also, applications of additives are presented after the systematic review on CZ‐, TPA‐, and PTZ‐based dyes.

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Dye‐sensitized solar cells using silicon phthalocyanine photosensitizers with pyridine anchor: Preparation, evaluation of photophysical, electrochemical, and photovoltaic properties

Güzel

Baş

Bıyıklıoğlu

et al. 2021

Applied Organom Chemis

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In this study, novel two silicon phthalocyanine photosensitizers (3PY-Si and 4PY-Si) containing pyridine groups as an electron-withdrawing and anchoring group have been prepared and chemically characterized for dye-sensitized solar cells (DSSCs). Photoelectrochemical and photovoltaic properties of the photosensitizers were evaluated. The new photosensitizers elucidated by spectroscopic and electrochemical techniques. As reported by fluorescence measurements, the silicon phthalocyanine photosensitizers exhibited slightly higher fluorescence quantum yield (Φ F = 0.25) than the unsubstituted zinc phthalocyanine which is favorable for photophysical applications. The DSSC based on complex 3PY-Si shows the highest power conversion efficiency (PCE) of 0.53% with the J sc , V oc and FF values of 1.205 mA cm −2 , 0.612 V, and 0.72, respectively, in the presence of the coadsorbent. These silicon phthalocyanine photosensitizers with bulky axial pyridine substituents found to be important materials for (DSSCs) since they show strong absorption in the red region and their ligands hamper the stacking of rings. This situation prevented the formation of aggregates with a common tendency to photosensitizers on the TiO 2 surface.

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Effects of meta or para connected organic dyes for dye-sensitized solar cell

Cited by 43 publications

References 56 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

Recent developments in metal‐free organic sensitizers derived from carbazole, triphenylamine, and phenothiazine for dye‐sensitized solar cells

Dye‐sensitized solar cells using silicon phthalocyanine photosensitizers with pyridine anchor: Preparation, evaluation of photophysical, electrochemical, and photovoltaic properties

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