Effects of co-coordinated auxiliary ligands on the photoelectrochemical behaviour of titanium-alkoxide-dyes

Guo, Yao; Hou, Jin-Le; Luo, Wen; Li, Zhaoqi; Zou, Dan-Hong; Zhu, Qian‐Jiang; Dai, Jie

doi:10.1039/c7ta05639g

Cited by 38 publications

(41 citation statements)

References 30 publications

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“…For crystal 3 , a broad main peak and a shoulder peak appear at 531.2 eV and 530.1 eV, respectively. The peak at 531.2 eV belongs to the C‐O‐Ti oxygen and the peak at 530.1 eV should be the oxygen of the Ti‐O‐Ti structure, which has a 0.2 eV positive shift in comparison with that of the pure TiO 2 . When 3 is modified on the TiO 2 substrate, the 531.2 eV peak is still retained and the Ti‐O‐Ti peak is overlapped with the TiO 2 signal of the substrate, showing an asymmetric peak.…”

Section: Resultsmentioning

confidence: 99%

“…The organic dye pre‐anchored TOCs were prepared and used as a new class of photosensitizers. Their advantages in the fabrication of photoactive electrodes have been proved, owing to the effective anchoring property of TOC cores on the surface of TiO 2 electrodes . As the model systems of DSSCs, synergistic effects of the dye and co‐coordinated auxiliary ligands toward the photocurrent conversion were also evaluated based on the dye‐TOCs …”

Section: Introductionmentioning

confidence: 99%

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A Series of Ti₆ Oxo Clusters Anchored with Arylamine Dyes: Effect of Dye Structures on Photocurrent Responses

Cui

Liu

Yang

et al. 2019

Chemistry An Asian Journal

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Dye molecules pre‐anchored on titanium oxo clusters (dye‐TOCs) are attractive as model compounds of dye‐sensitized titanium oxide. To investigate the effects of the dye ligand structures of the dye‐TOCs on photocurrent conversion, a series of dye‐TOCs with the same Ti6 core structure and different antenna ligands (L) was synthesized and characterized crystallographically. The TOCs have the same structural formula of [Ti6O4L2(O3PPh)2(OiPr)10]. Two types of dyes with para‐ or meta‐substituted structures were designed and used as the ligands. The results show that charge transfer from the donor group to the TiO core of the TOCs with the para‐substituted ligands is stronger than those with the meta‐substituted ligands. The steric effect of the ligands also greatly influences the photocurrent density. Larger branched structures of the dye ligands reduce the coverage density of the dye‐TOCs on TiO2 electrodes and also weaken the effective covalent bonding of the dye‐TOCs on the electrode, and consequently, the photocurrent is decreased.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Series of Ti₆ Oxo Clusters Anchored with Arylamine Dyes: Effect of Dye Structures on Photocurrent Responses

Cui

Liu

Yang

et al. 2019

Chemistry An Asian Journal

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“…Althoughg reat attention has been focused on the preparation of various PTCs, their photocurrentr esponses and photochromic behaviors are still rarely reported,e specially for complexes coordinated by carboxylate ligands. [36][37][38][39] We carried out photophysical studies on crystals of PTC-165 and PTC-166. Firstly,t heir optical absorption properties were investigated by diffuse-reflectance spectroscopy.…”

Section: Resultsmentioning

confidence: 99%

Acid‐Controlled Synthesis of Carboxylate‐Stabilized Ti₄₄‐Oxo Clusters: Scaling up Preparation, Exchangeable Protecting Ligands, and Photophysical Properties

Gao

Zhang

2019

Chemistry A European J

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Ar ange of polyoxotitaniumc lusters (PTCs) was constructed by tuning the type of acid (inorganic and organic) in alcoholics olvents, from Ti 4 ,T i 6 ,T i 9 ,T i 11 ,t oT i 16 .A fter removingthe tBuOH solvent, giant carboxylate-stabilized Ti 44oxo clusters in which propionic acid serves as both ligand and solvent were ultimately obtained. The four labile sites in the Ti 44 clusterc ore can be occupied by two formate and two propionatea nions (PTC-165)o rapairo fg lutarate( PTC-166)o r3 -methylglutarate anions( PTC-167). According to the synthesis of PTC-155 to PTC-167,t he propionic acid solvent plays ac rucial role in the constructiono fg iant Ti oxo clusters. Their one-poty ields,w hichr eadily reached up to 8.75 gf or PTC-165 and 9.96 gf or PTC-166,p rovedt he feasibility of large-scale preparation.M ore interestingly,t he ob-tainedT i 44 -oxo clusters are almostc ompletelys urroundedb y carboxylate ligands, which allow them to retain crystalline stabilityi na ir for aboutt hree weeksa nd in either acidic or basic aqueous solutiono ver aw ide pH range for at least 6h. In addition, PTC-165 and PTC-166 exhibit excellent UV photocurrentr esponse and reversible photochromice ffect. This work providesasystematic approachf or constructing highnuclearity and stable PTCs on al arge scale, which is significant for futurea pplicationso fP TC-based photochemical devices.

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“…[207] The modified PSCs exhibited reproducible PCE values with little hysteresis in the J-V curves, achieving efficiencies up to 19.5 and 20.6 %f or the Cs 2 CO 3modified and CsI-doped cells, respectively.T he dream for PSCs remains that of approaching as table and reproducible technology because it has also been important for DSSCs [208][209][210][211][212][213][214][215][216][217][218][219][220][221] and other energy-relatedd evices. [222][223][224][225][226][227][228][229][230][231] Caesium-Doped Perovskites in Emerging Technologies Enhanced optical absorption, long carrierd iffusion length and high carrierm obility of perovskite materials can also be exploitedi no ther applications than standard solar cells. Moreover,t he integration of PSCs with energy storages ystems [232][233][234][235][236][237][238][239][240] represent as trong research platform for future years.…”

Section: Caesium-doping In Other Perovskite Solar Cell Componentsmentioning

confidence: 99%

Caesium for Perovskite Solar Cells: An Overview

Bella

Renzi

Cavallo

et al. 2018

Chemistry A European J

150

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Perovskite solar cells have the potential to revolutionize the world of photovoltaics, and their efficiency close to 23 % on a lab-scale recently certified this novel technology as the one with the most rapidly raising performance per year in the whole story of solar cells. With the aim of improving stability, reproducibility and spectral properties of the devices, in the last three years the scientific community strongly focused on Cs-doping for hybrid (typically, organolead) perovskites. In parallel, to further contrast hygroscopicity and reach thermal stability, research has also been carried out to achieve the development of all-inorganic perovskites based on caesium, the performances of which are rapidly increasing. The potential of caesium is further strengthened when it is used as a modifying agent of charge-carrier layers in solar cells, but also for the preparation of perovskites with peculiar optoelectronic properties for unconventional applications (e.g., in LEDs, photodetectors, sensors, etc.). This Review offers a 360-degree overview on how caesium can strongly tune the properties and performance of perovskites and relative perovskite-based devices.

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Effects of co-coordinated auxiliary ligands on the photoelectrochemical behaviour of titanium-alkoxide-dyes

Abstract: The work demonstrated the advantages of titanium-alkoxide-dyes in improvement of photocurrent conversion, and revealed the synergistic effects of dye and auxiliary ligand.

Cited by 38 publications

References 30 publications

A Series of Ti₆ Oxo Clusters Anchored with Arylamine Dyes: Effect of Dye Structures on Photocurrent Responses

A Series of Ti₆ Oxo Clusters Anchored with Arylamine Dyes: Effect of Dye Structures on Photocurrent Responses

Acid‐Controlled Synthesis of Carboxylate‐Stabilized Ti₄₄‐Oxo Clusters: Scaling up Preparation, Exchangeable Protecting Ligands, and Photophysical Properties

Caesium for Perovskite Solar Cells: An Overview

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Effects of co-coordinated auxiliary ligands on the photoelectrochemical behaviour of titanium-alkoxide-dyes

Abstract: The work demonstrated the advantages of titanium-alkoxide-dyes in improvement of photocurrent conversion, and revealed the synergistic effects of dye and auxiliary ligand.

Cited by 38 publications

References 30 publications

A Series of Ti6 Oxo Clusters Anchored with Arylamine Dyes: Effect of Dye Structures on Photocurrent Responses

A Series of Ti6 Oxo Clusters Anchored with Arylamine Dyes: Effect of Dye Structures on Photocurrent Responses

Acid‐Controlled Synthesis of Carboxylate‐Stabilized Ti44‐Oxo Clusters: Scaling up Preparation, Exchangeable Protecting Ligands, and Photophysical Properties

Caesium for Perovskite Solar Cells: An Overview

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A Series of Ti₆ Oxo Clusters Anchored with Arylamine Dyes: Effect of Dye Structures on Photocurrent Responses

A Series of Ti₆ Oxo Clusters Anchored with Arylamine Dyes: Effect of Dye Structures on Photocurrent Responses

Acid‐Controlled Synthesis of Carboxylate‐Stabilized Ti₄₄‐Oxo Clusters: Scaling up Preparation, Exchangeable Protecting Ligands, and Photophysical Properties