Steric Effect of <i>N</i>-Substituted Triphenylamine on Double-Anchored Phenothiazine Dye-Sensitized Solar Cells

Han, Bo-Yu; Pan, Tzu-Ying; Wu, Yichen; Lin, Jiann T.; Chou, Hsien-Hsin; Li, Chunting

doi:10.1021/acsaem.2c04022

Cited by 10 publications

(5 citation statements)

References 47 publications

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“…The redox potentials of SD dyes were calculated by cyclic voltammetry and are displayed in Figure and Table . The first ground-state oxidation potential ( E HOMO ), calculated from the oxidation potential vs ferrocene/ferrocene + , was converted into the NHE upon the addition of 0.70 V. , The lowest unoccupied molecular orbital (LUMO) energy level of an ideal sensitizer should be situated above the TiO 2 conduction band for efficient charge injection, and the E HOMO of the sensitizer should be located below the redox function of the electrolyte for efficient dye regeneration. SD dyes have an E HOMO of 0.79–1.01 V, which is lower than the electrolyte redox function of liquid iodolyte with sufficient overpotential (∼400 mV) and, therefore, preferable for an efficient dye regeneration process.…”

Section: Resultsmentioning

confidence: 99%

Visible-Light-Active Unsymmetrical Squaraine Dyes with Pyridyl Anchoring Groups for Dye-Sensitized Solar Cells

Deshmukh,

Maibam,

Krishnamurty

et al. 2023

Langmuir

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Visible-light-active alkyl group-wrapped unsymmetrical squaraine dyes SD1−SD3 were synthesized, featuring an indoline donor and pyridine and carboxylic acid anchoring groups. Their photophysical, electrochemical, and photovoltaic characteristics were examined by fabricating a dye-sensitized solar cell (DSSC) device. Both carboxylic acid and pyridine anchoring groups containing squaraine dyes SD3 and SD2 possess similar photophysical and electrochemical characteristics. However, their photovoltaic performances were completely different. The SD3 dye with the carboxylic acid anchoring group displayed a DSSC device efficiency of 7.20% (V OC 0.81 V; J SC 12.29 mA/cm 2 ) using iodolyte (I − /I 3 − ) electrolyte, compared to SD1 (V OC 0.659 V; J SC 4.97 mA/cm 2 ; and η − 2.34%) and SD2 (V OC 0.629 V; J SC 1.68 mA/cm 2 ; and η − 0.84%), which were featured with pyridyl anchoring groups. These results were attributed to dye loading on the Lewis and Brønsted acidic sites of TiO 2 and the importance of aggregated structures for photocurrent generation. In the incident photon-to-current efficiency (IPCE) analysis, SD1 dye-sensitized devices exhibited photocurrent generation from both monomeric and aggregated dyes on the TiO 2 surface. In contrast, SD2 showed photocurrent generation solely from aggregated states. Despite the introduction of long alkyl chains to reduce dye aggregation and charge recombination, the results indicated preferential charge injection from only the aggregated SD2 dye on TiO 2 . Fluorescence-quenching experiments indicated an efficient charge transfer from the aggregated SD2 dye to TiO 2 compared to that of the monomeric dye. Cosensitization, a method to enhance the light-harvesting efficiency and photocurrent generation in DSSCs, was explored by simultaneously cosensitizing pyridyl-based dyes (SD1 and SD2) with a blue-colored carboxylic acid-based squaraine dye SD4. IPCE analysis demonstrated that both SD1 and SD4 contributed to generating a photocurrent of 9.11 mA/cm 2 . The sequential cosensitization of SD1 and SD4 with the coadsorbent CDCA showed the highest performance, with a V OC of 0.663 V, a J SC of 11.43 mA/cm 2 , and an efficiency (η) of 5.20%.

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Section: Resultsmentioning

confidence: 99%

Visible-Light-Active Unsymmetrical Squaraine Dyes with Pyridyl Anchoring Groups for Dye-Sensitized Solar Cells

Deshmukh,

Maibam,

Krishnamurty

et al. 2023

Langmuir

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“…As a result, DSSC with dye 73 exhibited a PCE of 10.47 % and 21.2 % under 1 sun and artificial light conditions respectively. [157] The chemical structures of metal free organic dyes consisting of cyanoacrylic acid anchoring unit are shown in Figures 11 -15 and their photovoltaic performance is tabulated in Table 2. ).…”

Section: Organic Dyes With Cyanoacrylic-acid Anchoring Unitmentioning

confidence: 99%

Molecular Engineering of Photosensitizers for Solid‐State Dye‐Sensitized Solar Cells: Recent Developments and Perspectives

Yadagiri,

Kumar Kaliamurthy,

Yoo

et al. 2023

ChemistryOpen

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Dye‐sensitized solar cells (DSSCs) are a feasible alternative to traditional silicon‐based solar cells because of their low cost, eco‐friendliness, flexibility, and acceptable device efficiency. In recent years, solid‐state DSSCs (ss‐DSSCs) have garnered much interest as they can overcome the leakage and evaporation issues of liquid electrolyte systems. However, the poor morphology of solid electrolytes and their interface with photoanodes can minimize the device performance. The photosensitizer/dye is a critical component of ss‐DSSCs and plays a vital role in the device‘s overall performance. In this review, we summarize recent developments and performance of photosensitizers, including mono‐ and co‐sensitization of ruthenium, porphyrin, and metal‐free organic dyes under 1 sun and ambient/artificial light conditions. We also discuss the various requirements that efficient photosensitizers should satisfy and provide an overview of their historical development over the years.

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“…The hig obtained at 1000 lux for compound 2b reaching a η of 5.64%, with JSC of 59 445 mV, and FF of 0.74. In 2023, Li et al reported a series of sensitizers bearing a phenothiazine scaffold, arranged in a D(-π-A)2 skeleton [76]. A prelimin study was conducted under simulated AM 1.5 G illumination using mediator.…”

Section: Charge Extraction (Ce) Open-circuit Voltage Decay (Ocvd) And...mentioning

confidence: 99%

“…The authors also perfor study on the addition of the nonconductive co-adsorbent CDCA in comb finding that a high concentration of CDCA (CDCA/TY1 ≈ 33/1) is necessa occupy the TiO2 surface not covered by the dye, decreasing the aggrega molecules and leading to enhanced JSC. In 2023, Li et al reported a series of sensitizers bearing a double-anchored phenothiazine scaffold, arranged in a D(-π-A) 2 skeleton [76]. A preliminary photovoltaic study was conducted under simulated AM 1.5 G illumination using I − /I 3 − as a redox mediator.…”

Section: Charge Extraction (Ce) Open-circuit Voltage Decay (Ocvd) And...mentioning

confidence: 99%

Recent Advances in Organic Dyes for Application in Dye-Sensitized Solar Cells under Indoor Lighting Conditions

D’Amico,

de Jong,

Bartolini

et al. 2023

Materials

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Among the emerging photovoltaic (PV) technologies, Dye-Sensitized Solar Cells (DSSCs) appear especially interesting in view of their potential for unconventional PV applications. In particular, DSSCs have been proven to provide excellent performances under indoor illumination, opening the way to their use in the field of low-power devices, such as wearable electronics and wireless sensor networks, including those relevant for application to the rapidly growing Internet of Things technology. Considering the low intensity of indoor light sources, efficient light capture constitutes a pivotal factor in optimizing cell efficiency. Consequently, the development of novel dyes exhibiting intense absorption within the visible range and light-harvesting properties well-matched with the emission spectra of the various light sources becomes indispensable. In this review, we will discuss the current state-of-the-art in the design, synthesis, and application of organic dyes as sensitizers for indoor DSSCs, focusing on the most recent results. We will start by examining the various classes of individual dyes reported to date for this application, organized by their structural features, highlighting their strengths and weaknesses. On the basis of this discussion, we will then draft some potential guidelines in an effort to help the design of this kind of sensitizer. Subsequently, we will describe some alternative approaches investigated to improve the light-harvesting properties of the cells, such as the co-sensitization strategy and the use of concerted companion dyes. Finally, the issue of measurement standardization will be introduced, and some considerations regarding the proper characterization methods of indoor PV systems and their differences compared to (simulated) outdoor conditions will be provided.

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Steric Effect of N-Substituted Triphenylamine on Double-Anchored Phenothiazine Dye-Sensitized Solar Cells

Cited by 10 publications

References 47 publications

Visible-Light-Active Unsymmetrical Squaraine Dyes with Pyridyl Anchoring Groups for Dye-Sensitized Solar Cells

Visible-Light-Active Unsymmetrical Squaraine Dyes with Pyridyl Anchoring Groups for Dye-Sensitized Solar Cells

Molecular Engineering of Photosensitizers for Solid‐State Dye‐Sensitized Solar Cells: Recent Developments and Perspectives

Recent Advances in Organic Dyes for Application in Dye-Sensitized Solar Cells under Indoor Lighting Conditions

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