Physics

Cluster (spacecraft)

Nanotechnology

Organic chemistry

Polyoxometalate

Crystallography

Tetrahedron

Optics

Absorption (acoustics)

Absorption spectroscopy

Engineering

Hydrothermal circulation

Catalysis

Composite material

Chemistry

Photosensitivity

Materials science

Programming language

Solvent

Computer science

Chemical engineering

Optoelectronics

Photochemistry

Chemical Science

Fully reduced polyoxometalates are predicted to give rise to a broad and strong absorption spectrum, suitable energy levels, and unparalleled electronic and optical properties. However, they are not available to date. Here, an unprecedented fully reduced polyoxomolybdate cluster, namely Na8[MoV60O140(OH)28]·19H2O {MoV60}, was successfully designed and obtained under hydrothermal conditions, which is rare and is the largest fully reduced polyoxometalate reported so far. The MoV60 molecule describes one Keggin {ε-Mo12} encapsulated in an unprecedented {Mo24} cage, giving rise to a double truncated tetrahedron quasi-nesting architecture, which is further face-capped by another four {Mo6} tripods. Its crystalline stability in air, solvent tolerance, and photosensitivity were all shown. As a cheap and robust molecular light-absorber model possessing wide light absorption, MoV60 was applied to build a co-sensitized solar cell photoelectronic device along with N719 dyes and the optimal power conversion efficiency was 28% higher than that of single-dye sensitization. These results show that MoV60 polyoxometalate could serve as an ideal model for the design and synthesis of all-inorganic molecular light-absorbers for other light-driven processes in the future.

An unprecedented fully reduced {Mo<sup>V</sup><sub>60</sub>} polyoxometalate: from an all-inorganic molecular light-absorber model to improved photoelectronic performance

An unprecedented fully reduced {MoV60} polyoxometalate: from an all-inorganic molecular light-absorber model to improved photoelectronic performance

An unprecedented fully reduced {Mo^V₆₀} polyoxometalate: from an all-inorganic molecular light-absorber model to improved photoelectronic performance