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Thermochromism from Ultrathin Colloidal Sb <sub/>2</sub> Se <sub/>3</sub> Nanowires Undergoing Reversible Growth and Dissolution in an Amine-Thiol Mixture
摘要： Thermochromism from Ultrathin Colloidal Sb2Se3 Nanowires Undergoing Reversible Growth and Dissolution in an Amine–Thiol Mixture. Liquid-based thermochromics can be incorporated into an arbitrarily shaped container and provide a visual map of the temperature changes within its volume. However, photochemical degradation, narrow temperature range of operation, and the need for stringent encapsulation processes are challenges that can limit their widespread use. Here, a unique solution-based thermochromic comprising ultrathin colloidal Sb2Se3 nanowires in an amine–thiol mixture is introduced. The nanowires undergo reversible growth and dissolution with repeated cycles of heating and cooling between 20 and 160 °C, exhibiting intense and contrasting color changes during these processes. Furthermore, the transition temperature in which a change in color first appears can be continuously tuned over a range larger than 100 °C by introducing controlled amounts of Sn2+. The colloidal nanowire dispersion in the amine–thiol mixture retains its thermochromic properties over hundreds of temperature cycles, continuous heating at 80 °C over months, and shelf life of up to 2 years in an open container under ambient conditions. To illustrate its utility as a robust liquid thermochromic, the nanowire solution is coated onto standard filter paper and its uses as a rewritable surface by thermal scribing, as well as an inexpensive means of visualizing the temperature distribution of an anisotropically heated block are demonstrated.
关键词： tin-doped antimony selenide,colloidal nanowires,thermochromic materials,liquid-based,reversible growth and dissolution
更新于2025-09-23 15:21:01
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All Antimony Chalcogenide Tandem Solar Cell
摘要： We demonstrate a proof-of-concept tandem solar cell using Sb2S3 and Sb2Se3 as top and bottom cell absorber materials. The band gaps of Sb2S3 and Sb2Se3 are 1.74 and 1.22 eV, perfectly satisfying the requirement of tandem solar cells. The application of few-layer graphene enables high transmittance and excellent interfacial contact in the top sub-cell. By controlling the thickness of the top cell for maximizing the spectral application, the tandem device delivers a power conversion efficiency of the 7.93%, which outperforms the individually optimized top cell (5.58%) and bottom cell (6.50%). Mechanistical investigation shows that the tandem device is able to make up voltage loss in the sub-cells, which is a critical concern in the current antimony chalcogenide solar cells. This study provides an alternative approach to enhancing the energy conversion efficiency of antimony selenosulfide.
关键词： antimony sulfide,energy conversion,semi-transparent electrode,tandem solar cell,antimony selenide
更新于2025-09-23 15:19:57
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1D/3D Alloying Induced Phase Transition in Light Absorbers for Highly Efficient Sb <sub/>2</sub> Se <sub/>3</sub> Solar Cells
摘要： Simple binary inorganic antimony selenide (Sb2Se3) compound is attractive as a promising light absorber for low-cost and high-efficiency photovoltaic. The external quantum efficiencies of Sb2Se3 solar cells are now approaching the optical limit values, which are comparable with the traditional well-developed solar cells (such as Si, CuInGaSe2, CdTe, etc). However, the power conversion efficiency of the Sb2Se3 devices is constrained by the open-circuit voltage (VOC) deficit, due to the intrinsic high resistivity and low element-doping efficiency in such one-dimensional (1D) crystals. In this work, a highly conductive, 3D crystal-structure AgSbSe2 phase, formed by phase transition from low symmetry binary Sb2Se3, is introduced to control the doping density in the alloyed (Sb2Se3)x(AgSbSe2)1-x films by utilizing configurational entropy. Guided by this alloying concept, 1D-3D (Sb2Se3)x(AgSbSe2)1-x alloy films with tunable doping densities are obtained. As a consequence, a noticeable improvement in VOC by >18% is observed in solar cells based on (Sb2Se3)x(AgSbSe2)1-x alloy absorber layer, as compared to the reference cell with a pure Sb2Se3 absorber, leading to a high conversion efficiency of 7.8%. This alloying model provides a universal approach to control the photoelectrical properties for high-efficiency Sb2Se3-based solar cells.
关键词： thin film solar cells,light absorber,voltage deficit,antimony selenide,1D/3D alloying
更新于2025-09-23 15:19:57
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Comparison of Clusters Produced from Sb2Se3 Homemade Polycrystalline Material, Thin Films, and Commercial Polycrystalline Bulk Using Laser Desorption Ionization with Time of Flight Quadrupole Ion Trap Mass Spectrometry
摘要： This study compared Sb2Se3 material in the form of commercial polycrystalline bulk, sputtered thin film, and homemade polycrystalline material using laser desorption ionization (LDI) time of flight mass spectrometry with quadrupole ion trap mass spectrometry. It also analyzed the stoichiometry of the SbmSen clusters formed. The results showed that homemade Sb2Se3 bulk was more stable compared to thin film; its mass spectra showed the expected cluster formation. The use of materials for surface-assisted LDI (SALDI), i.e., graphene, graphene oxide, and C60, significantly increased the mass spectra intensity. In total, 19 SbmSen clusters were observed. Six novel, high-mass clusters—Sb4Se4+, Sb5Se3-6+, and Sb7Se4+—were observed for the first time when using paraffin as a protective agent.
关键词： Antimony selenide,Clusters,Laser desorption ionization,Paraffin,Chalcogenides
更新于2025-09-11 14:15:04
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Enhanced photovoltaic performance of solution-processed Sb2Se3 thin film solar cells by optimizing device structure
摘要： Thin-film solar cells have attracted worldwide attention due to their high efficiency and low cost. Antimony selenide (Sb2Se3) is a promising light absorption material candidate for thin-film solar cells due to its suitable band gap, abundance, low toxicity, and high chemical stability. Herein, we fabricate an Sb2Se3 thin film solar cell using a simple hydrazine solution process. By controlling the thickness of the photoactive layer and inserting a poly(3-hexylthiophene) hole-transporting layer, an Sb2Se3 solar cell with a power conversion efficiency of 2.45% was achieved.
关键词： hole-transporting layer,n-i-p structure,solution process,poly(3-hexylthiophene),antimony Selenide,thin film solar cell
更新于2025-09-11 14:15:04
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Current transport and capacitance-voltage characteristics of Sb2Se3/n-Si heterojunction diode prepared by electron beam evaporation
摘要： The Sb2Se3 thin film was successfully deposited on the n-Si substrate using an electron beam evaporated technique. The structural investigation was done by means of X-ray diffraction analysis. The surface morphology and elemental analysis of the synthesized films were studied by FESEM and EDAX, respectively. The electrical properties of the Sb2Se3/n-Si heterojunction were considered by current-voltage (I-V) and capacitance-voltage (C-V) measurements. The I-V results of Sb2Se3/n-Si heterojunction diode show a rectifying behavior. The junction ideality factor, barrier height, and series resistance values were extracted from the rectifying curves at different temperatures. The capacitance-voltage results show the abrupt nature of the junction under consideration.
关键词： diode,ideality factor,Antimony selenide,Electron beam,FESEM,XRD
更新于2025-09-09 09:28:46