Efficiency enhancement of ruthenium-based DSSCs employing A–π–D–π–A organic Co-sensitizers

Abdellah, Islam M.; El‐Shafei, Ahmed

doi:10.1039/d0ra03916k

Cited by 19 publications

(13 citation statements)

References 56 publications

(80 reference statements)

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“…[38] Synthetically, modifying the energy levels of these complexes is also limited by the substituents on the ligands, leading to constraints in terms of band gap and energy level tuning. [52,54,55] The demonstrated metal-organic complexes used in MC DS-PECs usually follow a similar molecular template: a ruthenium central ion ligated by aromatic level in their conjugation length can be noticed. In particular triphenyl amine-based dyes with cyanoacrylic acid anchoring groups have been successfully demonstrated in DS-PEC as photosensitizers.…”

Section: Dye-sensitized Photoanodesmentioning

confidence: 99%

Organic Semiconductors as Photoanodes for Solar-driven Photoelectrochemical Fuel Production

Sekar¹,

Sivula

2021

Chimia

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The direct conversion of solar energy into chemical fuels, such as hydrogen, via photoelectrochemical (PEC) water splitting requires the efficient oxidation of water at a photoanode. While transition metal oxides have shown a significant success as photoanodes, their intrinsic limitations make them the bottleneck of PEC water splitting. Recently, initial research reports suggest that organic semiconductors (OSCs) could be possible alternative photoanode materials in both dye-sensitized and thin film photoelectrode configurations. Herein we review the progress to date, with a focus on the major issues faced by OSCs: stability and low photocurrent density in aqueous photoelectrochemical conditions. An outlook to the future of OSCs in photoelectrochemistry is also given.

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Section: Dye-sensitized Photoanodesmentioning

confidence: 99%

Organic Semiconductors as Photoanodes for Solar-driven Photoelectrochemical Fuel Production

Sekar¹,

Sivula

2021

Chimia

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“…Numerous studies have focused on enhancing the performance of DSSCs by optimizing various key components, including the photoelectrode, 4‐6 the photosensitizer, 7‐10 the redox electrolyte, 11‐13 and the counter electrode 14‐17 . Among these components, the photoelectrode has received particular attention because enhancing its properties can significantly improve the light‐energy absorption and harvesting capability.…”

Section: Introductionmentioning

confidence: 99%

Enhanced light harvesting in dye‐sensitized solar cells enabled by TiO ₂ :Er ³⁺ , Yb ³⁺ upconversion phosphor particles as solar spectral converter and light scattering medium

Luo

Geun

et al. 2021

Int J Energy Res

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Summary To improve the light‐harvesting properties of dye‐sensitized solar cells (DSSCs), light from the ultraviolet (UV), visible, and infrared (IR) regions of the solar energy should be effectively harvested. Ru(II)‐based dyes play a key role in harvesting energy from parts of the UV and visible regions but cannot absorb IR light. A strategy for improving the DSSC efficiency is to employ upconversion phosphors (UCPs) that can convert IR into visible light. In this study, using TiO2:Er3+, Yb3+ UCPs fabricated via a simple aerosol process and calcination, we examine the effects of upconversion and light scattering of UCPs added into the TiO2 thin‐film‐based photoelectrode on DSSC efficiency. Under IR irradiation, the fabricated TiO2:Er3+, Yb3+ UCPs emit visible light with emission peaks at 529, 550, and 650 nm. The power conversion efficiency (PCE) of the DSSCs is significantly improved by adding the optimized amount of UCPs with the average size of 500 nm in the TiO2 nanoparticles (NPs) matrix with the average size of 25 nm due to light upconversion and scattering effects. However, the addition of excess UCPs deteriorates the DSSCs efficiency owing to the rapid recombination between photogenerated electrons and holes and the increased interfaces between UCPs and TiO2. These results suggest that the light‐harvesting efficiency of DSSCs in the IR region can be enhanced by employing the optimal amount of large‐sized UCPs as light upconversion and scattering medium in the TiO2 thin‐film‐based photoelectrode.

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“…An organic dye is usually divided into donor-linker-acceptor (D-π-A) fragments where intramolecular charge transfer (ICT) occurs from D to A via the π-spacer [8][9][10][11] (Figure 1). The π-spacer units improve the conjugation and enhances the stability of the resulting photosensitizers [12]. Moreover, they offer a high degree of electron delocalization that allows for substantial electronic communication between individual π-spacer units.…”

Section: Introductionmentioning

confidence: 99%

A Theoretical Investigation of Decorated Novel Triazoles as DSSCs in PV Devices

Coetzee

Adeyinka

Magwa

2021

Preprint

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Some novel metal-free 1,2,4-triazole compounds A1-A8, based on the 3,5-bis(2-hydroxyphenyl)-1,2,4-triazole derivatives were examined for Photovoltaic properties using density functional theory (DFT) and time dependent density functional theory (TD-DFT) calculations for the use of dye sensitized solar cells (DSSCs). Through deductive logic, the fluorescence emission (Φf) and charge collection (ηc) efficiencies of these compounds as dyes were obtained and used to determine each dye’s incident conversion efficiency (IPCE). Furthermore, these parameters were also employed to assess the dye’s potential for photovoltaic technology. However, this technique is more suitable to predict the suitability of the dye for photovoltaic applications, and cannot measure the efficiency of DSSCs

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Efficiency enhancement of ruthenium-based DSSCs employing A–π–D–π–A organic Co-sensitizers

Abstract: The role of metal-free organic sensitizers (IMA1-4) in the improvement of photocurrent efficiency and the overall performance of the DSSCs when used as a co-sensitizer with a Ru(ii) sensitizer (IMA5).

Cited by 19 publications

References 56 publications

Organic Semiconductors as Photoanodes for Solar-driven Photoelectrochemical Fuel Production

Organic Semiconductors as Photoanodes for Solar-driven Photoelectrochemical Fuel Production

Enhanced light harvesting in dye‐sensitized solar cells enabled by TiO ₂ :Er ³⁺ , Yb ³⁺ upconversion phosphor particles as solar spectral converter and light scattering medium

A Theoretical Investigation of Decorated Novel Triazoles as DSSCs in PV Devices

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Efficiency enhancement of ruthenium-based DSSCs employing A–π–D–π–A organic Co-sensitizers

Abstract: The role of metal-free organic sensitizers (IMA1-4) in the improvement of photocurrent efficiency and the overall performance of the DSSCs when used as a co-sensitizer with a Ru(ii) sensitizer (IMA5).

Cited by 19 publications

References 56 publications

Organic Semiconductors as Photoanodes for Solar-driven Photoelectrochemical Fuel Production

Organic Semiconductors as Photoanodes for Solar-driven Photoelectrochemical Fuel Production

Enhanced light harvesting in dye‐sensitized solar cells enabled by TiO 2 :Er 3+ , Yb 3+ upconversion phosphor particles as solar spectral converter and light scattering medium

A Theoretical Investigation of Decorated Novel Triazoles as DSSCs in PV Devices

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Enhanced light harvesting in dye‐sensitized solar cells enabled by TiO ₂ :Er ³⁺ , Yb ³⁺ upconversion phosphor particles as solar spectral converter and light scattering medium