Y-shaped organic dyes with D2–π–A configuration as efficient co-sensitizers for ruthenium-based dye sensitized solar cells

Jin, Lingxia; Shi, Shengnan; Zhao, Caibin; Yu, Xiaohu; Lu, Jiu-Fu; Wang, Qin; Wei, Yawen

doi:10.1016/j.jpowsour.2020.228952

Cited by 38 publications

(15 citation statements)

References 66 publications

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“…reported the metal-ion coordination strategy to increase the V oc of DSSCs via slowing charge recombination kinetics but sacrificing the dye regeneration rate, which leads to inferior efficiency for optimized devices . In addition, adopting coadsorbents to suppress dye molecule self-aggregation on photoanodes and weaken the derived charge carrier recombination to increase the efficiency of DSSCs has been regarded as a universal strategy. , However, the photon-harvesting capability of DSSCs based on coadsorbents would be somewhat impaired for the reduced dye molecule loading on the photoanode . Even though great progress has been achieved for DSSCs, it is still challengeable for holistically optimizing the charge carrier events involved in DSSCs for further improving their efficiency.…”

Section: Introductionmentioning

confidence: 99%

Holistically Optimizing Charge Carrier Dynamics Enables High-Performance Dye-Sensitized Solar Cells and Photodetectors

Lan

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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Charge carrier events across organic electronics are ubiquitous, and the derived optimization plays a crucial effect on improving the performance of organic electronics. Herein, a two-dimensional material (Ti3C2T x ) is incorporated into titanium dioxide (TiO2) to impart the Ti3C2T x /TiO2 hybrid film enriched hydroxy group distribution, defect-negligible surface, upshifted work function, and enhanced conductivity yet electron mobility versus the pristine TiO2 film. Therefore, intensified photon-harvesting ability, reduced charge carrier recombination, and efficient charge carrier collection are realized for dye-sensitized solar cells (DSSCs) based on the Ti3C2T x /TiO2 hybrid photoanode relative to control ones. Consequently, the modified DSSCs based on Z907 deliver superior efficiencies of 10.39 and 29.68% under 100 mW/cm2 illumination and ∼1.9 mW/cm2 dim light, respectively, being the highest values of Z907-based DSSCs. However, control devices only obtain lower efficiencies of 8.06 and 23.91% when undergoing the abovementioned illumination. On the other hand, the self-powered homologous photodetectors with the hybrid film as an electron-transporting layer present enhanced detectivity (1.69 × 1011 Jones) and a shortened responsivity of 0.26 s versus that of control ones (1.39 × 1011 Jones and 0.35 s). Our work implies that the Ti3C2T x /TiO2 hybrid film features high potential for improving the performance of organic electronics for its effect of holistically optimizing charge carrier dynamics.

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Section: Introductionmentioning

confidence: 99%

Holistically Optimizing Charge Carrier Dynamics Enables High-Performance Dye-Sensitized Solar Cells and Photodetectors

Lan

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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“…As a result, a variety of organic co-sensitizers have been created to overcome ruthenium dye's poor ultraviolet and visible light utilization, and these co-sensitization DSSCs displayed improved efficiencies. 54,[59][60][61][62] Younas et al 63 developed a co-sensitized device using Z907, a ruthenium dye, and SQ2, an organic sensitizer, with a 7.83% overall efficiency. Senadeera et al 64 used Eosin-Y and Rose Bengal dyes for the co-sensitization and got the highest efficiency of 2.09%.…”

Section: Introductionmentioning

confidence: 99%

“…When a single dye's optical absorption cannot entirely capture the sun spectrum, co-sensitizing two or more dyes with distinct absorption spectra to create panchromatic absorption is a possible alternative. [52][53][54] The co-sensitization technique has shown to be an efficient way to increase spectrum responsiveness, with working electrodes containing two or more sensitizers with complementary optical absorption characteristics. 55,56 However, ruthenium complexes often have moderate absorption, particularly in the ultraviolet, resulting in a valley in the monochromatic incoming photon to current efficiency spectra of about 400 nm.…”

Section: Introductionmentioning

confidence: 99%

The improved performance of dye‐sensitized solar cells using co‐sensitization and polymer gel electrolyte

Selvakumar

2022

Intl J of Energy Research

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To investigate the photovoltaic capabilities as a sensitizer and co-sensitizer for dye-sensitized solar cells (DSSCs), a new metal-free organic dye (CDIB) was synthesized. In addition, different concentrations of 1-n-hexyl-3-methylimidazolium iodide ionic liquid (IL) doped poly(vinylidene fluoride-hexafluoropropylene) gel polymer electrolytes are prepared and the high conductive electrolyte is used to fabricate the devices. The device having CDIB sensitizer and IL-15% electrolyte showed an efficiency of 1.86%. Further, the effect of CDIB co-sensitization on Z907 is examined. Consequently, the power conversion efficiency of DSSC with co-sensitized dye is raised by 23.29%, from 4.55 to 5.61%, when compared to DSSCs with individual dyes. This improvement is mostly due to an increase in a short-circuit current density and open-circuit voltage. Highlights• Co-sensitization is being used to enhance the performance of DSSCs.• Poly(vinylidene fluoride-hexafluoropropylene)-based gel polymer electrolytes doped with different amounts of 1-n-hexyl-3-methylimidazolium iodide were prepared for improving the conductivity of electrolyte.• A co-sensitized DSSC has an efficiency of 5.61%.• With co-sensitization, both V OC and J SC increased significantly.

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“…[10][11][12] In general, introducing co-sensitizers is an effective approach to address issues such as dye aggregation and charge recombination, which is known as the co-sensitization technology of DSSCs. [13][14][15][16][17][18] However, the field of co-sensitization is still far from mature, and some limitations arising from the use of multiple dyes on metal oxide semiconductor layers remain to be addressed (e.g., unfavorable dyeÁ Á Ádye p-p interactions lead to electron quenching, etc.). At present, these can be delayed in a number of ways, most typically by adding the anti-aggregation agents chenodeoxycholic acid (CDCA) or deoxycholic acid (DCA).…”

Section: Introductionmentioning

confidence: 99%

An optimal molecule-matching co-sensitization system for the improvement of photovoltaic performances of DSSCs

Liu

Zhu

et al. 2022

Phys. Chem. Chem. Phys.

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Y-shaped organic dyes with D2–π–A configuration as efficient co-sensitizers for ruthenium-based dye sensitized solar cells

Cited by 38 publications

References 66 publications

Holistically Optimizing Charge Carrier Dynamics Enables High-Performance Dye-Sensitized Solar Cells and Photodetectors

Holistically Optimizing Charge Carrier Dynamics Enables High-Performance Dye-Sensitized Solar Cells and Photodetectors

The improved performance of dye‐sensitized solar cells using co‐sensitization and polymer gel electrolyte

An optimal molecule-matching co-sensitization system for the improvement of photovoltaic performances of DSSCs

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