SnS2

/Tag: SnS2

Finding a junction partner for candidate solar cell absorbers enargite and bournonite from electronic band and lattice matching. (arXiv:1810.13219v1 [cond-mat.mtrl-sci])

2018-11-01T02:29:20+00:00November 1st, 2018|Categories: Publications|Tags: |

An essential step in the development of a new photovoltaic (PV) technology is choosing appropriate electron and hole extraction layers to make an efficient device. We recently proposed the minerals enargite (enargite) and bournonite (bournonite) as materials that are chemically stable with desirable optoelectronic properties for use as the absorber layer in a thin-film PV device. For these compounds, spontaneous lattice polarization with internal electric fields — and potential ferroelectricity — may allow for enhanced carrier separation and novel photophysical effects. In this work, we calculate the ionization potentials for non-polar surface terminations and propose suitable partners for forming solar cell heterojunctions by matching the electronic band edges to a set of candidate electrical contact materials. We then further screen these candidates by matching the lattice constants and identify those that are likely to minimise strain and achieve epitaxy. This two-step screening procedure identified a range of unconventional candidate contact materials including SnS2, ZnTe, WO3, and Bi2O3.

Published in: "arXiv Material Science".

Two-dimensional hybrid composites of SnS2 with graphene and graphene oxide for improving sodium storage: A first-principles study. (arXiv:1810.07864v1 [cond-mat.mtrl-sci])

2018-10-19T02:29:19+00:00October 19th, 2018|Categories: Publications|Tags: , , , |

Among the recent achievements of sodium-ion battery (SIB) electrode materials, hybridization of two-dimentional (2D) materials is one of the most interesting appointments. In this work, we propose to use the 2D hybrid composites of SnS2 with graphene or graphene oxide (GO) layers as SIB anode, based on the first-principles calculations of their atomic structures, sodium intercalation energetics and electronic properties. The calculations reveal that graphene or GO film can effectively support not only the stable formation of hetero-interface with the SnS2 layer but also the easy intercalation of sodium atom with low migration energy and acceptable low volume change. The electronic charge density differences and the local density of state indicate that the electrons are transferred from the graphene or GO layer to the SnS2 layer, facilitating the formation of hetero-interface and improving the electronic conductance of the semiconducting SnS2 layer. These 2D hybrid composites of SnS2/G or GO are concluded to be more promising candidates for SIB anodes compared with the individual monolayers.

Published in: "arXiv Material Science".

Realization of vertical metal semiconductor heterostructures via solution phase epitaxy

2018-09-06T10:35:00+00:00September 6th, 2018|Categories: Publications|Tags: , |

Realization of vertical metal semiconductor heterostructures via solution phase epitaxyRealization of vertical metal semiconductor heterostructures via solution phase epitaxy, Published online: 06 September 2018; doi:10.1038/s41467-018-06053-zControlling the composition and crystal phase of layered heterostructures is important. Here, the authors report the liquid-phase epitaxial growth of Sn0.5W0.5S2 nanosheets with 83% metallic phase on SnS2 nanoplates, which are used as 100 ppb level chemiresistive gas sensors at room temperature.

Published in: "Nature Communications".

Phosphine ligands-mediated kinetics manipulation of aqueous cation exchange: a case study on synthesis of [email protected] core-shell nanocrystals for photoelectrochemical water splitting

2018-08-13T12:33:21+00:00August 13th, 2018|Categories: Publications|Tags: |

Chem. Commun., 2018, Accepted ManuscriptDOI: 10.1039/C8CC05545A, CommunicationXiaoyan Cheng, Jia Liu, Xiaodong Wan, Hongzhi Wang, Yuemei Li, Jiajia Liu, Hongpan Rong, Meng Xu, Wenxing Chen, Jiatao [email protected] and [email protected] core-shell hybrid nanocrystals (HNCs) were respectively accessed via the aqueous cation exchange-mediated growth strategy by using different phosphine ligands. The choice of proper ligands during synthesis is…The content of this RSS Feed (c) The Royal Society of Chemistry

Published in: "Chemical Communications".

Low-Frequency Raman Spectroscopy of Few-Layer 2H-SnS2. (arXiv:1807.02214v1 [cond-mat.mtrl-sci])

2018-07-09T02:29:38+00:00July 9th, 2018|Categories: Publications|Tags: |

We investigated interlayer phonon modes of mechanically exfoliated few-layer 2H-SnS2 samples by using room temperature low-frequency micro-Raman spectroscopy. Raman measurements were performed using laser wavelength of 441.6, 514.4, 532 and 632.8 nm with power below 100 uW and inside a vacuum chamber to avoid photo-oxidation. The intralayer Eg and A1g modes are observed at ~206 cm-1 and 314 cm-1, respectively, but the Eg mode is much weaker for all excitation energies. The A1g mode exhibits strong resonant enhancement for the 532 nm (2.33 eV) laser. In the low-frequency region, interlayer vibrational modes of shear and breathing modes are observed. These modes show characteristic dependence on the number of layers. The strengths of the interlayer interactions are estimated by fitting the interlayer mode frequencies using the linear chain model and are found to be 1.64 x10^19 N.m-3 and 5.03 x10^19 N.m-3 for the shear and breathing modes, respectively.

Published in: "arXiv Material Science".

Versatile Strategy for Ultrathin SnS2 Nanosheets Confined in N-Doped Graphene Sheets Composite for High Performance Lithium and Sodium-ion batteries

2018-06-26T02:32:54+00:00June 26th, 2018|Categories: Publications|Tags: , |

Chem. Commun., 2018, Accepted ManuscriptDOI: 10.1039/C8CC04255A, CommunicationShi Tao, Dajun Wu, Shuangming Chen, Bin Qian, Wangsheng Chu, Li SongIn this work, few-layer SnS2 nanosheets confined in nitrogen-doped graphene sheets composite (SnS2/NGS) are successfully synthesized by a facile thermal decomposition method. The SnS2/NGS demonstrates sufficient nitrogen-doping and fully graphene…The content of this RSS Feed (c) The Royal Society of Chemistry

Published in: "Chemical Communications".

Effective lattice Hamiltonian for monolayer tin disulfide: Tailoring electronic structure with electric and magnetic fields

2018-06-12T16:33:34+00:00June 12th, 2018|Categories: Publications|Tags: |

Author(s): Jin Yu, Edo van Veen, Mikhail I. Katsnelson, and Shengjun YuanThe electronic properties of monolayer tin dilsulfide (ML−SnS2), a recently synthesized metal dichalcogenide, are studied by a combination of first-principles calculations and tight-binding (TB) approximation. An effective lattice Hamiltonian based on six hybrid sp-like orbitals with trigonal rotati…[Phys. Rev. B 97, 245410] Published Tue Jun 12, 2018

Published in: "Physical Review B".

Enhanced light trapping and high charge transmission capacities of novel structure for efficient photoelectrochemical water splitting

2018-05-29T12:50:36+00:00May 29th, 2018|Categories: Publications|Tags: |

Nanoscale, 2018, Accepted ManuscriptDOI: 10.1039/C8NR03040E, PaperJianglong Mu, Hui Miao, Enzhou Liu, Juan Feng, Feng Teng, Dekai Zhang, Yumeng Kou, Yanping Jin, Jun Fan, Xiaoyun HuAn excellent PEC efficiency, good reusability, and super stability of trap-like SnS2/TiO2 nanotube arrays (NTs) photoanode is reported. Specifically,

Published in: "RSC Nanoscale".

Enhanced light trapping and high charge transmission capacities of novel structure for efficient photoelectrochemical water splitting

2018-05-29T12:50:36+00:00May 29th, 2018|Categories: Publications|Tags: |

Nanoscale, 2018, Accepted ManuscriptDOI: 10.1039/C8NR03040E, PaperJianglong Mu, Hui Miao, Enzhou Liu, Juan Feng, Feng Teng, Dekai Zhang, Yumeng Kou, Yanping Jin, Jun Fan, Xiaoyun HuAn excellent PEC efficiency, good reusability, and super stability of trap-like SnS2/TiO2 nanotube arrays (NTs) photoanode is reported. Specifically,

Published in: "RSC Nanoscale".

High efficiency electrochemical reduction of CO2 beyond two-electron transfer pathway on grain boundary rich ultra-small SnO2 nanoparticles

2018-05-03T09:18:01+00:00May 3rd, 2018|Categories: Publications|Tags: |

J. Mater. Chem. A, 2018, Accepted ManuscriptDOI: 10.1039/C8TA01367E, PaperChenglu Liang, Byoungsu Kim, Shize Yang, Yang Liu, Cristiano Woellner, Zhengyuan Li, Robert Vajtai, Wei Yang, Jingjie Wu, Paul J.A. Kenis, Pulickel M. AjayanWell crystallized and interconnected SnO2 nanoparticles (< 5 nm) were synthesized via

Published in: "Journal of Materials Chemistry A".

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