Evidence of the Ambipolar Behavior of Mo₆ Cluster Iodides in All-Inorganic Solar Cells: A New Example of Nanoarchitectonic Concept

Abstract

The supporting information is available free of charge.Grazing incidence X-ray diffraction patterns (GIXRD) of the [{Mo 6 I i 8 }I a 4 (H 2 O) a 2 ].xH 2 O photoelectrode, XPS analyses (wide-range spectra, I 3d, Mo 3d and Cs 4d) obtained on the MC film and the MC precursor powder and charge carrier lifetimes determined on the MC film via the OCP decay (file type, i.e., PDF).

Enhanced NH3 Sensing Performance of Mo Cluster-MoS2 Nanocomposite Thin Films via the Sulfurization of Mo6 Cluster Iodides Precursor

“…The GIXRD results in Figure 2 a show the patterns of the initial MI@FTO and sulfurized samples. The wide peak observed around 9–12 degrees and the sharp crystal peaks at the higher 2θ angle in the initial MI@FTO pattern can be identified as the amorphous Mo 6 cluster iodide film and SnO 2 :F from the FTO substrate, respectively, which is consistent with our previous studies [ 45 , 51 ]. MoS 2 and SnS are found as the final products during this sulfurization process (see MI-450 pattern in Figure 2 a).…”

“…Conversely, the core contains a small amount of S and a high concentration of the Mo and O elements. This fact shows that, first, the film-bound water during the EPD process [ 45 , 58 ] serves as the O source, suggesting that the initial Mo 6 cluster iodide is probably oxidized into MoO 3 . The H 2 S gas then serves as the S source for the subsequent sulfurization to produce MoS 2 on the nanoparticle surface.…”

“…Cs + cations and [{Mo 6 I i 8 }X a 6 ] 2− (X = I, OH) were deposited on the cathode and the FTO glass anode, respectively [ 45 ]. It should be noted that during the EPD coating process, the [{Mo 6 I i 8 }I a 6 ] 2− cluster molecules will lose two iodide apical ligands, which were replaced by water ligands, as confirmed by the XPS result in a previously published report [ 45 ]. Accordingly, the final composition of the MI@FTO film in this study is described as [{Mo 6 I i 8 }I a 4 (H 2 O) a 2 ]·xH 2 O.…”

“…This EPD method maintained the optoelectronic properties of the initial CMI raw powder, which will significantly promote the fabrication of Mo 6 -cluster-based optoelectronic devices in the future. Moreover, Renaud et al recently proved that the Mo 6 cluster iodides are a new class of ambipolar materials [ 45 ], and the {Mo 6 I i 8 }-based thin films (noted MI@FTO) fabricated via the EPD method have shown a significant application potential as a photoabsorber in an all-solid solar cell in the future. Moreover, Guy et al used various Mo 6 clusters powders (Cs 2 Mo 6 CI 14 , (TBA) 2 Mo 6 Br 14 , etc.)…”

A Neutral Heteroleptic Molybdenum Cluster trans-[{Mo6I8}(py)2I4]

“…Among these properties are (i) bright luminescence in red/near infrared spectral regions (with microsecond lifetimes and high quantum yields) under the excitation of ultraviolet/visible light (up to 550 nm) or X-rays [1][2][3][4][5][6][7][8]; (ii) the efficient photosensitization of the reactive oxygen species generation process (mainly singlet oxygen, 1 O 2 ) [4,[8][9][10]; (iii) high radiopacity due to a high local concentration of heavy atoms in a cluster core [7,11]. Thus, different groups have demonstrated the utilization of cluster complexes individually or as active components of the materials in numerous areas, such as catalytic systems [12][13][14][15][16], liquid crystals [17,18], oxygen sensors [19][20][21][22], solar concentrators [16,23,24], an active layer of solar cells [25,26], bioimaging, photodynamic therapy (PDT) [27][28][29][30][31][32][33], as components of self-sterilizing materials [34][35][36][37], or as radiocontrast agents [11]. The abundance of publ...…”