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.

All inorganic CsPbX3 (X = Cl, Br, I) perovskite nanocrystals (PNCs) with 50-85% photoluminescence quantum yields and tunable emission in the range of 440-682 nm have been successfully synthesized at room temperature in open air. This facile strategy enables us to prepare gram-scale CsPbBr3 NCs with a PLQY approaching 80%.

Water-soluble Cu-In-S/ZnS core/shell quantum dots with a photoluminescence quantum yield up to 38% and an emission peak tunable from 543 to 625 nm have been successfully synthesized. All of the synthetic procedures were conducted in an aqueous solution at 95 °C under open-air conditions. L-Glutathione and sodium citrate were used as the dual stabilizing agents to balance the reactivity between copper and indium ions.

bridged Fe binuclear counterion, the exchange interaction is weaker than charge-transfer complexes of BETS [16] and stronger than charge-transfer complexes of TTF, [17] TMTTF, [17] and BEDT-TTF. [15] However, the value of the exchange interaction is smaller than the transition temperature (20 K), suggesting that the chain is unlikely to order three-dimensionally independently above 10 K. Given that Fe III (d 5 , s = 5/2) is a symmetric ion with a 6 A ground state, anisotropy will be very small and of second order and cannot be responsible for the transition at 19.8 K if it is driven by the Dzyaloshinski±Moriya antisymmetric-exchange mechanism, a common source of canting in antiferromagnets. Therefore, the only plausible way for the long-range magnetic ordering to occur at 19.8 K would be through interactions with the TTF moments. Thus, there exists p±d interaction in this compound. Further work is in progress to study the extent of this coupling. For such a small canting angle, one cannot consider the compound to be represented by only two sublattices; there should be four (two of TTF and two of Fe).To confirm the highly localized electronic nature of the TTF stacks, we measured the resistivity, which was possible on a small 25 lm crystal, by the two-probe method with 25 lm gold wire attached by gold paste. Because of the high resistance, the temperature-dependence measurement was carried on an Advantest R8340 Ultra High Resistance Meter with the temperature controlled by a Linkam TMS93 system. The resistivity at room temperature is 4 10 7 X cm, and the estimated activation energy is ca. 1 eV, which is fairly high. It corresponds to the transfer integral calculation that the overlap integral within the dimer is almost ten times larger than those between dimers along the a-axis and 300 times larger than those between dimers along the [011] direction.[24] Consequently, the band structure is characterized by a large gap between the valence and conduction bands. In summary, a new molecular hybrid displaying canted antiferromagnetism has been prepared and characterized. It is the first salt of TTF or its derivatives to contain a 1D magnetic coordination polymer as the anion. Due to possible p±d cation±anion interactions through short S_Cl, S_O contacts a 3D NØel state is stabilized at a rather high temperature of 19.8 K. It is a wide-bandgap semiconductor.

Homogeneous molecular precursor solutions are excellent choices for obtaining smooth absorber layers, and they offer the potential to significantly lower the manufacturing cost of solar cells. Here, we present a thermally degradable metal butyldithiocarbamate-based solution approach to fabricate Cu2ZnSn(S,Se)4 solar cells. Low-cost Cu2O, ZnO, and SnO were used as the starting materials and were dissolved in the ethanol solution of butyldithiocarbamic acid. By tuning the composition of the Cu2ZnSn(S,Se)4 thin film, a power conversion efficiency of 6.03% on the basis of the active area has been achieved.

We have developed a two-phase approach for the synthesis of shape-controlled colloidal zirconia nanocrystals, including spherical-, teardrop-, rod-, and rice grain-shaped particles. We found that the key factors for controlling the shape were the reaction time, the nature of the capping agent, and the monomer concentration. We have analyzed the morphologies, crystallinity, optical properties, and structural features of the as-prepared ZrO2 nanoparticles by using transmission electron microscopy (TEM), high-resolution TEM, X-ray powder diffraction, and UV-vis absorption and fluorescence spectroscopy. The possible nucleation and growth process is also discussed.

Nearly monodisperse alloyed (CuInS2)x(ZnS)1-x nanocrystals with cubic and hexagonal phases were successfully synthesized for the first time, and the band gaps of these alloyed nanocrystals can be tuned in the broad range of 1.5 to 3.7 eV by changing the ratio of CuInS2 to ZnS.

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