Synthesis of Cu−In−S Ternary Nanocrystals with Tunable Structure and Composition

Abstract

Nearly monodisperse Cu-In-S ternary nanocrystals with tunable composition, crystalline structure, and size were synthesized by a hot-injection method using mixed generic precursors. Such ternary nanocrystals with zincblende and wurtzite structure were reported for the first time. This work correlates the crystalline structure of the binary ZnS nanoparticles with those of ternary Cu-In-S nanocrystals, demonstrating the feasibility of making their alloyed or core/shell structure. Furthermore, this work may provide suitable material candidates for low-cost, high-efficiency solar cell fabrication.

Wurtzite Cu2ZnSnSe4 nanocrystals for high-performance organic–inorganic hybrid photodetectors

“…30 Therefore, controllable synthesis of materials with new crystal structures, especially metastable structures such as wurtzite, is opening up an avenue to develop nanomaterials with new exciting properties and applications. 8,11,14,27,30 This encourages us to investigate the formation of ternary and multiple component chalcogenides with wurtzite structure. In this paper, we, for the first time, reported the synthesis of CZTSe quaternary NCs with wurtzite structure, their formation mechanism and the use in high-performance hybrid photodetector.…”

“…10,11 Many attractive colloidal NCs, including SnSe, PbS and I-III-VI 2 NCs and so on, have been prepared in consideration of band gap optimization for wider solar spectral response. 5,8,[12][13][14][15][16] Among them, I-III-VI 2 , especially copper indium diselenide (CuInSe 2 ), is proven a very promising light-absorbing materials in photoelectric devices, because of their high optical-absorption coefficients and versatile optical and electrical characteristics, which can in principle, be manipulated and tuned for a specific need in a given device. 17 The nearly 20% energy conversion efficiency of CuInSe 2 -based singlejunction solar cells has been demonstrated.…”

“…25,26 On the other hand, it is well known that the composition and structure of NCs significantly affect their optical and electrical properties, and the structure can be tuned by source materials, capping ligands, as well as synthetic temperature. 8,13,14,27,28 The reported Cu 2 ZnSn(S,Se) 4 NCs mostly show the stannite or kesterite structures. [19][20][21][22]25 Recently, Li and coworkers 26 reported the Cu 2 ZnSnS 4 NCs with wurtzite structure, which has been found in many binary and ternary chalcogenides, but seldom in quaternary compounds.…”

“…[19][20][21][22]25 Recently, Li and coworkers 26 reported the Cu 2 ZnSnS 4 NCs with wurtzite structure, which has been found in many binary and ternary chalcogenides, but seldom in quaternary compounds. 8,13,14,29,30 The wurtzite structure owns disordered cations, and the random distribution of A and B ions in the wurtzite phase offers the flexibility for stoichiometry control, which is advantageous for the fabrication of photovoltaic devices, as it provides the ability to tune energy band gap for device optimization. 30 Therefore, controllable synthesis of materials with new crystal structures, especially metastable structures such as wurtzite, is opening up an avenue to develop nanomaterials with new exciting properties and applications.…”

A new crystal: layer-structured rhombohedral In3Se4

“…10,11,15,16 In particular, the layered indium selenide nanomaterials are anticipated to exhibit superior physical properties, owing to their anisotropic photon geometries and large surface-to-volume ratios, together with photon and carrier confinement effects. 10 [28][29][30][31][32][33][34] have been successfully synthesized recently through this approach by controlling the growth kinetics. 60 Figure 1 Experimental bandgaps of typical indium selenides and indium tellurides (α, β, and γ represent the commonly used names for the different phases of indium selenides and indium tellurides, and r-and tstand for rhombohedral and tetragonal, respectively).…”