Unsymmetrically pyrazole-3-carboxylic acid substituted phthalocyanine-based photoanodes for use in water splitting photoelectrochemical and dye-sensitized solar cells

Yıldız, Burak; Güzel, Emre; Akyüz, Duygu; Arslan, Barış Seçkin; Şener, M. Kasım

doi:10.1016/j.solener.2019.09.043

Cited by 35 publications

(25 citation statements)

References 53 publications

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“…In the presence of CDCA, the IPCE values of the DSSCs with CDCA are much improved compared with those without CDCA (Figure 7b), which suggests that the coadsorbent suppresses dye aggregation. [30,31] 3.5 | Electrochemical impedance spectroscopy analysis…”

Section: Photovoltaic Properties Of Dsscsmentioning

confidence: 99%

Dye‐sensitized solar cells based on zinc(II) phthalocyanines bearing 3‐pyridin‐3‐ylpropoxy anchoring groups

Keleş

Bıyıklıoğlu

Güzel

et al. 2020

Applied Organom Chemis

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In this study, nonperipherally tetra-substituted (2), peripherally tetrasubstituted (3), and peripherally octa-substituted (4) zinc(II) phthalocyanines were synthesized as sensitizers for dye-sensitized solar cells (DSSCs) in which 3-pyridin-3-ylpropoxy substituent acts as anchoring unit to bind TiO 2 surface. The optical results indicated that there is an interaction between the dyes and the TiO 2 surface. The photovoltaic performances of the DSSCs based on these dyes were found to depend on both the position and number of the substituents. Despite the more red-shifted absorption, the DSSC based on 2 showed the conversion efficiency of 0.68%, which is lower than 1.36% and 0.92% for 3 and 4, respectively, under one sun (AM 1.5G). The vertical orientation of the dye on TiO 2 surface could be the main reason for the higher photovoltaic performance of complex 3, which is beneficial for not only injecting the electrons into the conduction band of TiO 2 but also reducing the charge recombination. Overall, these results demonstrate that the peripherally tetra-substituted 3-pyridin-3-ylpropoxy zinc(II) phthalocyanine complex (3) as a sensitizer can more efficiently utilize the photons in the red/near-infrared region with respect to the other complexes studied.

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Section: Photovoltaic Properties Of Dsscsmentioning

confidence: 99%

Dye‐sensitized solar cells based on zinc(II) phthalocyanines bearing 3‐pyridin‐3‐ylpropoxy anchoring groups

Keleş

Bıyıklıoğlu

Güzel

et al. 2020

Applied Organom Chemis

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“…The enhancement of V OC can be interpreted by the co-adsorbent occupation of the bare TiO 2 surface in this way slightly suppress the charge recombination. [31,32] The incident photon to current conversion efficiency (IPCE) of 3PY-Si and 4PY-Si devices is performed. The IPCE spectra are consistent with the absorption spectra on the semiconductor TiO 2 film.…”

Section: Phthalocyaninesmentioning

confidence: 99%

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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“…Sensitizers 16 , 17, and 18 were designed by introducing bulky dihexyloxyphenyl groups to suppress dye aggregation and improve the photovoltage, affording a highest efficiency of 7.03% (see Table 1 ) [ 78 ]. With the six hexylsulfanyls as the bulky electron-donating groups, sensitizer 19 suppresses dye aggregation on TiO 2 , and the higher electron donating ability was favorable for light harvesting [ 79 ]. But at the same time, the introduction of bulky groups will also decrease the loading amounts.…”

Section: Dye Aggregation In Dsscsmentioning

confidence: 99%

Cause, Regulation and Utilization of Dye Aggregation in Dye-Sensitized Solar Cells

Testoff

Wang

2020

Molecules

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As an important member of third generation solar cell, dye-sensitized solar cells (DSSCs) have the advantages of being low cost, having an easy fabrication process, utilizing rich raw materials and a high-power conversion efficiency (PCE), prompting nearly three decades as a research hotspot. Recently, increasing the photoelectric conversion efficiency of DSSCs has proven troublesome. Sensitizers, as the most important part, are no longer limited to molecular engineering, and the regulation of dye aggregation has become a widely held concern, especially in liquid DSSCs. This review first presents the operational mechanism of liquid and solid-state dye-sensitized solar cells, including the influencing factors of various parameters on device efficiency. Secondly, the mechanism of dye aggregation was explained by molecular exciton theory, and the influence of various factors on dye aggregation was summarized. We focused on a review of several methods for regulating dye aggregation in liquid and solid-state dye-sensitized solar cells, and the advantages and disadvantages of these methods were analyzed. In addition, the important application of quantum computational chemistry in the study of dye aggregation was introduced. Finally, an outlook was proposed that utilizing the advantages of dye aggregation by combining molecular engineering with dye aggregation regulation is a research direction to improve the performance of liquid DSSCs in the future. For solid-state dye-sensitized solar cells (ssDSSCs), the effects of solid electrolytes also need to be taken into account.

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Unsymmetrically pyrazole-3-carboxylic acid substituted phthalocyanine-based photoanodes for use in water splitting photoelectrochemical and dye-sensitized solar cells

Cited by 35 publications

References 53 publications

Dye‐sensitized solar cells based on zinc(II) phthalocyanines bearing 3‐pyridin‐3‐ylpropoxy anchoring groups

Dye‐sensitized solar cells based on zinc(II) phthalocyanines bearing 3‐pyridin‐3‐ylpropoxy anchoring groups

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

Cause, Regulation and Utilization of Dye Aggregation in Dye-Sensitized Solar Cells

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