Phosphine-free engineering toward the synthesis of metal telluride nanocrystals: the role of a Te precursor coordinated at room temperature

Abstract

We developed a new phosphine-free strategy for fabricating high-quality metal telluride nanocrystals (NCs) by using a highly reactive Te precursor coordinated at room temperature. These metal telluride NCs with good optical properties possess excellent application prospects.

Expediting Hydrogen Evolution through Topological Surface States on Bi2Te3

“…Based on this analysis, we have performed data fitting for the original XPS spectra by adding a peak at the left shoulder of each of the Bi or Te in Bi 2 Te 3 peaks. Indeed, all the raw data are now well fitted as shown in Figure c,d with all the binding energies of major peaks of Bi 2 Te 3 , TeO 2 , and Bi 2 O 3 consistent with the reported standard values. ,,− Interestingly, previous XPS studies reported that an oxidized Te surface contains a small suboxide peak (TeO) besides the dominant TeO 2 peak, , which locates also in the left shoulder of the Te core level, similar to what has been observed in our study. We believe these additional peaks provide the evidence of the existence of the Bi 2 Te 3 suboxide structures predicted from our theoretical studies.…”

“…As can be seen in the top spectra in Figure S8a,b, which were obtained before Ar + sputtering, a peak appears on the left-hand side of each of the four Te and Bi core levels. These four peaks can be assigned to Te in TeO 2 and Bi in Bi 2 O 3 because their binding energies are close to the reported standard values of 586.2 eV (Te 3d 3/2 ), 575.9 eV (Te 3d 5/2 ), 164.3 eV (Bi 4f 5/2 ), and 159.0 eV (Bi 4f 7/2 ) of these two oxides. − It is worthwhile to mention that, before sputtering, the two TeO 2 peaks are more pronounced than the two Bi 2 O 3 peaks. After sputtering for 10 s (middle spectra), the two peaks associated with TeO 2 are barely detectable, while the two peaks associated with Bi 2 O 3 drop only slightly.…”

Thermally fabricated cobalt telluride in nitrogen-rich carbon dodecahedra as high-rate potassium and sodium ion battery anodes

“…Yang, Zou and co-workers employed a green phosphine-free synthesis procedure to obtain telluride nanocrystals with promising luminescence, photovoltaic and thermoelectric properties. 29 Gupta et al developed a solution-based colloidal synthesis method for fabrication of ferromagnetic Cr 2 Te 3 and CuCr 2 Te 4 nanocrystals with uniform morphology and narrow size distribution. 30 Zhang et al employed a low-temperature (160 °C) hydrothermal method to synthesize graphene – supported cobalt telluride, opening an exciting new path for wet fabrication of various tellurides.…”

Binary and Ternary Colloidal Cu‐Sn‐Te Nanocrystals for Thermoelectric Thin Films

“…[25][26][27][28] In contrast, ternary copper tin telluride (Cu 2 SnTe 3 ) nanomaterials have rarely been synthesized through colloidal methods because of either narrow regions of phase diagrams that must be accessed or the imbalanced reaction affinity of metals to tellurium. [29,30] So far, Yang and coworkers used TeO 2 as Te precursor to synthesize nearly monodispersed Cu 2 SnTe 3 NCs. [31] To the best of our knowledge, this is the only colloidal synthesis of pure Cu 2 SnTe 3 NCs.…”