A Novel Carboxyethyltin Functionalized Sandwich-type Germanotungstate: Synthesis, Crystal Structure, Photosensitivity, and Application in Dye-Sensitized Solar Cells

Abstract

A novel sandwich-type germanotungstate [C(NH2)3]10[Mn2{Sn(CH2)2COOH}2(B-α-GeW9O34)2]·8H2O (1) represents the first single crystalline polyoxometalate (POM) functionalized by open chain carboxyethyltin, which was designed and synthesized in aqueous solution and applied to a dye-sensitized solar cell (DSSC) for the first time. Its photosensitivity was explored through a fluorescence spectrum (FL), surface photovoltage spectrum (SPV), electrochemical method, and solid diffuse spectrum. 1 displays the primary features of sensitizers in DSSCs, and the efficiency of the solar cell is 0.22%. Delightedly, when 1 was employed to assemble a cosensitized solar cell configuration by preparing a 1-doped TiO2 electrode and additionally adsorbing N719 dyes, a considerably improved efficiency was achieved through increasing spectral absorption and accelerating electron transport, which is 19.4% higher than that of single N719 sensitization. This result opens up a new way to position different dyes on a single TiO2 film for cosensitization.

Counter electrodes from Mo–Se nanosheet alloys for bifacial dye-sensitized solar cells

“…Fig. 3c shows the Bode EIS spectra of the symmetric dummy cells and the t values (t ¼ 1/ (2pf) [32], f is the peak frequency correspond to charge-transfer process) are listed in [33], where R is the gas constant, T is the absolute temperature, n is the number of electrons involved in I 3 À reduction (n ¼ 2), F is Faraday's constant, R ct is charge-transfer resistance obtained from the Nyquist EIS plots. Apparently, the sequence of R ct values from Tafel polarization curves is in an agreement with that from EIS plots.…”

Microwave‐Assisted Preparation and Characterization of a Polyoxometalate‐Based Inorganic 2D Framework Anode for Enhancing Lithium‐Ion Battery Performance

“…[31] Reports about polyoxometalates synthesized through microwave irradiation are few but meaningful;i th as provided an ew way of thinking in polyoxometalate synthesis, [32] and chemical reactions under microwave assistance have been proved to be efficient and ecofriendly. Although extensive research has been carriedo ut among sandwich-like polyoxometalates owing to their particular applications in magnetism, [36][37][38] catalysis, [39][40][41] luminescence, [42,43] and solar cells, [44] this is the first time it has been employed in lithium-ion batteries. Although extensive research has been carriedo ut among sandwich-like polyoxometalates owing to their particular applications in magnetism, [36][37][38] catalysis, [39][40][41] luminescence, [42,43] and solar cells, [44] this is the first time it has been employed in lithium-ion batteries.…”

New Member of Organic Ligand Functionalized TMSP: Synthesis, Characterized and Properties of Na15[(MnII(COOH))3(AsW9O33)2]·15H2O

“…Recent years, the introduction of organic functional groups to TMSP has became a hot research field and drew more and more attention [16][17][18][19][20]. Generally, migrate functional organic groups to TMSP framework can not only produce new properties on the resulting hybrid compounds but also offer new coordination site to further construct expand structure and devices, whereas, despite these extraordinary advantages, related research is still rather slow [21][22][23].…”