ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Di Wu,Weiqin Wang,Yanna NuLi,Jun Yang,Jiulin Wang
To enhance the electrochemical performance of Se cathode for high-energy-density magnesium-selenium (Mg–Se) batteries with easily prepared nucleophilic (PhMgCl) 2 -AlCl 3 +LiCl/THF (APC-based) hybrid electrolyte, Cu doped Se@MC composites (Cu–Se@MC) with different Cu content (0.05, 0.10, 0.15, 0.20, 0.25 and 0.30) are prepared by impregnation reduction and melting selenization method. The composites are composed of a mixture of chain-structured Se and CuSe embedding in the microporous carbon, and the addition of Cu significantly improves reversibility and cycle life of the composites in the nucleophilic APC-based hybrid electrolyte. At the 0.25 Cu content, the cell exhibits 346.7mAhg −1 first discharge capacity and the specific capacity maintains at 112mAhg −1 after 200 cycles at a current density of 50 mA g −1 , which is superior to that with non-nucleophilic Mg(HMDS) 2 -(AlCl 3 ) 2 –MgCl 2 +LiTFSI/DME (HMDS-based) and MBA-(MgCl 2 ) 2 –(AlCl 3 ) 2 +LiCl/THF (MBA-based) hybrid electrolytes.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2023
·Vol. 52
·期 8
·5422-5429
·
IF 2.1
Xu Jiaxiong,Wu Xiaoshuai
Chalcogenide Cu 2 ZnSn(S,Se) 4 (CZTSSe) is a promising absorber material for photovoltaic applications. When CZTSSe thin film is deposited on an Mo substrate, a Mo(S,Se) 2 layer easily forms between the CZTSSe and the Mo, which is detrimental to the back contact property of the CZTSSe. This work proposes a useful way to inhibit the formation of Mo(S,Se) 2 by sputtering a CuCrO 2 layer on a Mo-foil substrate before the deposition of the CZTSSe. The effects of CuCrO 2 thickness on the crystalline structures, morphologies, and electrical properties of the fabricated samples were studied. The results showed that the insertion of the CuCrO 2 layer prevented the formation of Mo(S,Se) 2 . As the thickness of the CuCrO 2 increased, the thickness of the Mo(S,Se) 2 layer decreased. The Mo(S,Se) 2 layer was absent from the cross-sectional scanning electron microscopy image when the CuCrO 2 thickness exceeded 85 nm. The back contact resistance of CZTSSe decreased monotonously as the CuCrO 2 layer thickened due to the reduction in the Mo(S,Se) 2 layer thickness. Therefore, by inserting a CuCrO 2 layer to separate the CZTSSe and the Mo-foil, the formation of the Mo(S,Se) 2 layer between them was effectively suppressed, and the back contact properties of the CZTSSe thin film were significantly enhanced.
研究领域:
材料科学
·
光伏技术
·
薄膜太阳能电池
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Chao Yu,Zhanfang Cao,Shuang Chen,Shuai Wang,Hong Zhong
Designing of catalysts with high activity and earth abundance which can further enhance the electrocatalytic hydrogen evolution performance so as to improve the hydrogen production efficiency. In this paper, we synthesized 1T-MoSe 2 -Se/MgAl-LDH composites by in-situ hydrothermal reduction method. The high proportion 1T phase (73.73%) of ultra-thin layer 1T-MoSe 2 -Se was obtained by acid dissolution operation, which can be ascribed to the limiting growth effect of MgAl-LDH. Compared to Pure MoSe 2 , it dramatically improved HER catalytic activity. the optimal 1T-MoSe 2 -Se (24 h) exhibits superior HER performance with a small overpotential (122 mV at the current density of 10 mA cm −2 ) and Tafel slope (54 mV dec −1 ) as well as excellent electrochemical stability. The introduction of Se can promote the conductivity of 1T-MoSe 2 -Se catalyst. Moreover, the best electrocatalytic hydrogen evolution performance can be exhibited synergistically only when the optimal match between MoSe 2 and Se is achieved, which are confirmed by XPS analysis and HER test results.
研究领域:
材料科学
·
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2022
·Vol. 331
·期 5
·2311-2317
·
IF 1.754
Wu Tao,Geng Zilong,Feng Zhengye,Pan Guoxiang,Shen Qiang
The diffusion of Re(VII), Se(IV) and Cr(VI) in compacted Gaomiaozi bentonite was conducted by an integrated diffusion setup. The effective diffusion coefficient and the rock capacity factor of Re(VII), Se(IV) and Cr(VI) were measured. Re(VII) and Cr(VI) were excluded from the surface of bentonite particles with an accessible porosity of 0.40 and 0.23. The geometric factor decreased in a sequence of Cr(VI) < Se(IV) < Re(VII), indicating that Cr(IV) had a lower tortuosity, a larger diffusion pore diameter, and a stronger anionic exclusion effect from the surface of bentonite platelets.
研究领域:
环境科学
·
地球化学
·
材料科学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Jiangshan Gao,Yang Zhou,Zhiming Liu,Huanhuan Wang,Yan He
Herein, N-doped carbon nanotubes (CNTs) encapsulating NiCo-Se nanoparticles (NPs) are assembled to spheres (NCNTs/NiCo-Se), which are successfully synthesized by using Ni-Co prussian blue analogues (PBAs) as templates and precursors. It is rare to derive CNTs from PBAs by means of C 3 H 6 among the reported work and the structure evolution of NCNTs spheres derived from PBAs is exhibited. The high flow rate of N 2 and C 3 H 6 tend to cause short CNTs and large diameter of CNTs, respectively, owing to the dual-effect of diffusion and deposition of C atoms. Due to the advantage superposition of CNTs with high length-diameter ratio and NiCo-Se NPs, NCNTs/NiCo-Se gets excellent capabilities of charge transfer, diffusion efficiency, and electrochemical reactions. When the C 3 H 6 /N 2 is 0.2/0.3 L min −1 , the as-fabricated NCNTs/NiCo-Se deliver a substantially appreciable specific capacitance of 171.1 mAh g −1 (current density of 1 A g −1 ). The asymmetric supercapacitor (ASC) yields a maximum energy density of 55 Wh kg −1 at a power density of 801 W kg −1 . In general, this work offers an attractive route to synthesize CNTs composites from PBAs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2025
·Vol. 131
·期 10
·1-14
·
IF 2.8
Ning Qiyun,Li Bingwei,Zhou Wang,Xu Xiaoting,Li Jun
In this study, Bi₂O₂Se nanosheets were synthesized via a hydrothermal method, and a Bi₂O₂Se/WSe₂ heterostructure was subsequently constructed using a mechanical compounding approach to develop a photoelectrochemical photodetector. By optimizing the mass ratio and KOH electrolyte concentration, the Bi₂O₂Se/WSe₂ heterostructure exhibited optimal performance at a 7:1 ratio in 0.1 M KOH. Benefiting from the interfacial heterojunction between the two materials, the Bi₂O₂Se/WSe₂ heterostructure achieved a photocurrent density of -2.74 µA/cm² under zero external bias, representing an order-of-magnitude enhancement compared to pristine Bi₂O₂Se nanosheets. Concurrently, the rise time was significantly reduced from 0.86 s to 0.28 s, And the decay time decreased from 4.85 s to 0.32 s, demonstrating superior self-powered characteristics. Furthermore, the Bi₂O₂Se/WSe₂ heterostructure exhibited a maximum photoresponsivity of 61 µA/W. The optimized Bi₂O₂Se/WSe₂ photodetector showed no notable performance degradation during a 10,000 s cyclic on/off illumination test. This work highlights the immense potential of the Bi₂O₂Se/WSe₂ heterostructure-based self-powered photodetector in delivering exceptional self-driven functionality, outstanding optoelectronic properties, and robust stability for practical applications.
研究领域:
材料科学
·
纳米科技
·
半导体物理
·
光电化学
·
器件物理
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 6
·2866-2875
·
IF 7.233
Yeying Wang,Xijian Liu,Guoying Deng,Jian Sun,Haikuan Yuan,Qi Li,Qiugeng Wang,Jie Lu
In this study, a versatile tumor-targeted and multi-stimuli-responsive drug delivery vehicle (Se particle@porous silica–folic acid–copper sulfide/doxorubicin (Se@SiO2–FA–CuS/DOX)) was fabricated for combined photothermal therapy with chemotherapy in cancer treatment. Due to excellent targeting ability, the Se@SiO2–FA–CuS/DOX nanocomposites actively accumulated in tumor tissues and thus provided photothermal therapy under NIR irradiation and chemotherapy through the release of DOX and Se. Owing to the synergistic effect of chemotherapy (Se and DOX) and photothermal therapy, the Se@SiO2–FA–CuS/DOX nanocomposites could efficiently inhibit cancer cells both in vitro and in vivo and even completely eliminate tumors. Moreover, as the toxicity of DOX could be reduced by Se, the treatment using Se@SiO2–FA–CuS/DOX nanocomposites exhibited no appreciable adverse reactions. Thus, the Se@SiO2–FA–CuS/DOX nanocomposites have great potential as a multifunctional nanoplatform in future clinical applications.
研究领域:
肿瘤学
·
纳米医学
·
药剂学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Junjie Fu,Afei Zhang,Dongxing Kou,Zewen Xiao,Wenhui Zhou,Zhengji Zhou,Shengjie Yuan,Yafang Qi,Zhi Zheng,Sixin Wu
One important issue limiting the development of Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells is the severe recombination loss at CZTSSe/Mo(S,Se) 2 /Mo back contact, primarily arising from the non-matched potential barrier and inferior electric contact between absorber and weak n -type Mo(S,Se) 2 interfacial layer. It is expected that a p-type Mo(S,Se) 2 can effectively improve the hole extraction and enhance the device performance. In this work, we propose a plausible direction to build up an electrically benign back surface field by in-situ doping Mo(S,Se) 2 with group VB elements (TM = V, Nb and Ta). It is turned out that the generated V Mo , Nb Mo , or Ta Mo shallow acceptors could convert Mo(S,Se) 2 from weak n -type to p-type conductivity and increase its work function ( W F ) and hole concentration. With the contact of p-type absorber ( W F,absorber < W F,Mo(S,Se)₂ ), a benign ohmic contact with favorable downward band bending is formed, thereby accelerating the holes extraction and minimizing interface recombination loss. With significant gains in open-circuit voltage ( V oc ) and fill factor (FF), the Mo(S,Se) 2 :Ta device finally increases the efficiency from 10.82 % to 12.72 %. This convenient in-situ Mo(S,Se) 2 doping strategy is different from previous complicated or unstable cases and should serve as a basis for high-quality back contact engineering in kesterite photovoltaics.
研究领域:
材料科学
·
光伏技术
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 8
·期 18
·2100971
·
IF 6.147
Saqib Nawaz Khan,Sijie Ge,Ening Gu,Santhosh Kumar Karunakaran,Wentao Yang,Ruijiang Hong,Yaohua Mai,Xianzhong Lin,Guowei Yang
The use of transparent conducting oxides (TCO) as a back contact for Cu 2 ZnSn(S,Se) 4 (CZTSSe) thin film solar cell enables light absorption from both front and rear sides and allows for the fabrication of semi-transparent photovoltaic devices. However, the CZTSSe solar cell based on TCO substrate suffers from high parasitic losses owing to the long post-annealing time at elevated temperature required for high-quality absorber. This work aims to overcome this issue by carefully tailoring the annealing conditions to obtain high-performance solar cell. Rapid thermal processing is used to instantaneously generate high Se vapor pressure at target temperature and shorten the annealing time. The crystalline quality, morphology, and particularly the photovoltaic performance of the resulting CZTSSe thin film are systematically investigated. It is found that the increase of annealing temperature and time improves the crystalline quality but unfortunately deteriorates the device performance owing to increasing parasitic losses. Increasing the amount of Se allows to get highly crystalline absorber within 7 min of annealing, yielding a total area 5.56% efficient CZTSSe solar cell with front illumination resulting from reducing parasitic losses. This work provides a simple approach to preserve the back contact without using a complex interfacial layer.
研究领域:
材料科学
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 28
·2101476
·
IF 18.808
Yanlin Pan,Xiaobo Hu,Yixin Guo,Xingyu Pan,Fei Zhao,Guoen Weng,Jiahua Tao,Chunhu Zhao,Jinchun Jiang,Shaoqiang Chen,Pingxiong Yang,Junhao Chu
The vapor transport deposition of quasi-one-dimensional antimony selenosulfide (Sb 2 (S,Se) 3 ) has recently attracted increasing research interest for the inexpensive, high-throughput production of thin film photovoltaic devices. Further improvements in Sb 2 (S,Se) 3 solar cell performance urgently require the identification of processing strategies to control the orientation, however the growth mechanism of high quality absorbers is still not completely clear. Herein, a facile and general vapor transport deposition approach to precisely control the growth of large-grained dense Sb 2 (S,Se) 3 films with good crystallization and preferred orientation via the source vapor speed is utilized. It is found that defect activation energy rather than the defect concentration plays a decisive role in the Sb 2 (S,Se) 3 photovoltaic performance. Admittance spectroscopy analysis is used to obtain efficient Sb 2 (S,Se) 3 solar cells. By employing dual-source coordinations to optimize the absorber layer a power conversion efficiency of 8.17% is obtained which is the highest efficiency for Sb 2 (S,Se) 3 solar cells fabricated by vapor transport technology. This study suggests that there are other opportunities for gaining deeper a understanding of the defect physics and carrier recombination mechanisms in other highly oriented low-dimensional materials to achieve improved device performance.
研究领域:
材料科学
·
光伏技术
·
半导体薄膜
·
可再生能源
✓ 已验证
DOI
高影响因子
Sustainable Energy & Fuels
·
2023
·Vol. 8
·期 3
·604-609
·
IF 5.6
Jinhui Zhang,Chuanhe Ma,Haixuan Gao,Jinchun Jiang,Hailong Wang
An over-thick MoSe2 layer and numerous voids at the absorbing layer inside and backside lead to a relatively low Jsc and PCE of CZTSSe solar cells. In previous studies, MoO2 and MoO3 sacrificial layers have been commonly used to eliminate those voids and reduce the thickness of MoSe2 layers. However, there is still no clarity about which one is more effective. In this work, we prepared MoO2 and MoO3 sacrificial layers on the surface of Mo-coated SLG substrates by air annealing and ammonia (NH3·H2O) etching, respectively. J–V testing shows that both MoO2 and MoO3 can effectively improve the Jsc and PCE of CZTSSe solar cells, wherein MoO3 is more effective. Comparative analysis shows that the electrical mechanism of Jsc and PCE improvement lies in the significant reduction of device series resistance (Rs). SEM images and XRD pattern results indicate that the reason for Rs decreasing is void elimination and MoSe2 layer thickness reduction from 600 nm to 270 nm after applying MoO3. With the aid of the MoO3 sacrificial layer, the PCE of the CZTSSe device increases from 7.51% to 9.58% (total area 0.21 cm2) without the MgF2 anti-reflection layer.
研究领域:
材料科学
·
太阳能
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2014
·
IF 8.535
Qingwen Tian,Gang Wang,Wangen Zhao,Yanyan Chen,Yanchun Yang,Lijian Huang,Daocheng Pan
We developed a versatile and environmentally friendly solution approach for the fabrication of a variety of metal sulfide nanocrystal thin films. Metal oxides, metal hydroxides, metal chlorides, metal acetates, and metal acetylacetonates can be used as the starting materials and dissolved in thioglycolic acid and ethanolamine, forming many types of metal–organic precursor solutions. High quality CdS, SnS, CuInS2, CuSbS2, Cu2ZnSnS4, Cu(In0.7Ga0.3)S2, and luminescent Ag-doped ZnxCd1–xS nanocrystal thin films have been successfully prepared by spin-coating their corresponding metal precursor solutions. Cu2ZnSn(S,Se)4 thin film solar cell with a power conversion efficiency of 6.83% has been realized by this versatile method.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）