Advanced Materials Interfaces
·
2022
·Vol. 9
·期 21
·2200393
·
IF 6.389
Ting Wang,Bin Yao,Yongfeng Li,Zhanhui Ding,Jiayong Zhang,Chunkai Wang,Jia Liu
An amorphous boron nitride (aBN) layer is inserted between Cu 2 ZnSn(S,Se) 4 (CZTSSe) films and Mo back electrode of CZTSSe solar cell by magnetron sputtering to mitigate the carrier recombination at back interface by tuning energy band alignment and suppressing formation of secondary phases and Mo(S,Se) 2 . The effect of the aBN layer on power conversion efficiency (PCE) of CZTSSe solar cell is investigated by numerical simulation and experiment. It is found that PCE is greatly improved via the insertion of suitable thick aBN layer, which is attributed to increased open-circuit voltage ( V OC ) and fill factor (FF). By quantitative analysis, it is deduced that the increased V OC originates mainly from decrease in reverse saturation current density ( J 0 ), followed by increase in shunt resistance ( R Sh ), and the increased FF is mainly due to the decreased J 0 , followed by increased R Sh and decreased photogenerated current density ( J L ). By optimizing aBN thickness through tuning sputtering time, the PCE increases from 8.68% of CZTSSe solar cell without the aBN layer to 9.51% of the CZTSSe solar cell with aBN layer. The influence mechanism of the aBN layer on the PCE is suggested by analyzing quantitatively the effect of the aBN layer on J L and electrical parameters.
研究领域:
光伏技术
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材料科学
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半导体器件
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薄膜太阳能电池
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 1
·120898
·
IF 7.2
Jing Wang,Guangxi Wang,Xiaoyan Ji,Zhiwen Chang,Yu Wang,Wenguang Chen,Leilei Zhang,Shuwen An,Yi Gu,Jun Liu
The mining, processing, and refining of rare-earth ores generate Th-rich radioactive wastewater, making its effective treatment critical for environmental protection and public health. In this study, mesoporous MoX 2 -α-ZrP (X = S, Se) composite powders were synthesized for Th(IV) adsorption from aqueous solutions. Under the conditions of [Th(IV)] initial = 50 ± 2 mg·L −1 , pH initial = 3, temperature = 298 K, and a contact time = 1440 min, the larger pore volume and pore width of the composites, compared with α-ZrP, enhanced the adsorption capacity ( q e ) of MoSe 2 -α-ZrP and MoS 2 -α-ZrP to 146.3 ± 7.4 mg·g −1 and 143.7 ± 2.5 mg·g −1 , respectively. Higher pH, [Th(IV)] initial, and temperature further enhanced Th(IV) adsorption. Notably, MoX 2 -α-ZrP removed Th(IV) from simulated leaching solution of monazite or bastnaesite and selectively adsorbed Th(IV) in the presence of co-existing ions. Thermodynamic and kinetic analyses confirmed a spontaneous, endothermic, and homogeneous chemisorption behavior. The Thomas and Yoon-Nelson models accurately described dynamic column Th(IV) adsorption, and increases in adsorbent mass, together with decreases in influent Th(IV) concentration, and reduced flow rate extended both breakthrough and saturation times. Mechanistic studies revealed Th(IV) coordination with oxygen-containing groups, ion exchange with -OH, and electrostatic interaction with phosphate groups. Results from our study can help explore the adsorption behaviors and mechanisms of Th(IV) on potential MoX 2 (X = O, S, Se)-based or α-ZrP-based materials for treating Th-rich radioactive wastewater.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Rui Wang,Yanchun Yang,Guonan Cui,Lulu Bai,Zhihui Gong,Chengjun Zhu
CuSb(S, Se) 2 (CASSe) is known to have great potential for copper-based low-cost thin-film solar cells due to its excellent stability, earth-abundant raw materials, and suitability for the low-temperature preparation process. In this work, CASSe thin-film solar cells were prepared using the green n-butylammonium butyrate ionic solution-based method for the first time. The phase purity, crystallinity , morphology, and electrical properties of films prepared at different conditions (sintering and selenization conditions) were studied. With the help of the XRD , Raman spectra , SEM, and c-AFM measurements, the optimal preparation of CASSe thin film is confirmed at 230 °C for 3 min (sintering condition) and 390 °C for 20 min (selenization condition). Using glass/Mo/CuSb(S, Se) 2 /CdS/i-ZnO/ITO/Al as the structure of the device, the corresponding thin film solar cell can be fabricated, which presents a photoelectric conversion efficiency (PCE) of 0.14 %. Although the performance of the device is poor, our conclusions are meaningful in the development of CASSe material, supplementing the blank of preparing CASSe thin film solar cells by the green solution-based method.
研究领域:
材料科学
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新能源技术
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半导体薄膜
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光伏器件
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高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 20
·6764-6775
·
IF 4.174
Xuerui Yi,Xiaobo He,Fengxiang Yin,Biaohua Chen,Guoru Li,Huaqiang Yin
Developing earth-abundant highly efficient catalysts for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is indispensable for the widespread implementation of electrochemical water splitting to store renewable energy. Herein, amorphous bimetallic selenide (Ni–Fe–Se) hollow nanospheres electrodeposited on nickel foam (Ni–Fe–Se/NF) are developed as a bifunctional catalyst for the HER and OER. The HER and OER bifunctional activity of Ni–Fe–Se/NF outperforms those of monometallic Ni–Se/NF and Fe–Se/NF owing to the synergy of Ni and Fe in Ni–Fe–Se/NF. Moreover, the amorphous hollow spherical morphology of Ni–Fe–Se/NF increases the active site density and facilitates the mass transfer of electrolytes and H2/O2 products. Ni–Fe–Se/NF drives a current density of 10 mA cm−2 with an overpotential of ∼85 mV for the HER and 100 mA cm−2 with an overpotential of ∼222 mV for the OER. As the HER and OER bifunctional catalyst, Ni–Fe–Se/NF can split alkaline water with total voltages of ∼1.52 V and ∼1.66 V at 10 mA cm−2 and 100 mA cm−2, respectively, and remain stable over 50 hours of operation in 1 M KOH.
研究领域:
材料科学
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电化学
·
可再生能源
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Li Shao,Xing Qian,Hongmei Li,Chong Xu,Linxi Hou
Ternary nickel cobalt selenide (Ni-Co-Se) alloy based hollow microspheres have been successfully synthesized via a simple one-step hydrothermal route by controlling different hydrothermal temperatures. The prepared samples were divided by reaction temperatures (140, 160, 180 and 200 °C) and named as Ni-Co-Se-140, Ni-Co-Se-160, Ni-Co-Se-180 and Ni-Co-Se-200, respectively. With the temperature increasing, the hollow microspheres formed at the lower temperature and broke at the higher temperature, and the sample Ni-Co-Se-180 exhibited the most regular and homogeneous hollow microspheres with a size of 1.5–2.5 μm. Moreover, the Ni atomic ratios in Ni-Co-Se alloys increased with the temperature rising. The prepared Ni-Co-Se alloys were used as counter electrode (CE) catalysts for dye-sensitized solar cells (DSSCs). A series of electrochemical tests all verified Ni-Co-Se alloy based CEs had superior electrocatalytic activities and Ni-Co-Se-180 CE displayed the largest current density, lowest overpotential and smallest charge-transfer resistance than the other CEs and Pt CEs. Benefiting from their unique morphologies and surface structures, the cells with the Ni-Co-Se-160, Ni-Co-Se-180 and Ni-Co-Se-200 based CEs achieved high efficiencies of 8.39%, 9.04% and 8.72%, respectively, which were all higher than that of Pt CE (8.07%).
研究领域:
材料科学
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能源科学
·
化学工程
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高影响因子
Nanoscale
·
2022
·Vol. 15
·期 1
·259-265
·
IF 8.307
Lin Tian,Zhenyang Chen,Tingjian Wang,Ming Cao,Xinhua Lu,Wenjing Cheng,Changchun He,Ju Wang,Zhao Li
Oxygen evolution reactions (OERs) are regarded as the rate-determining step of electrocatalytic overall water splitting, which endow OER electrocatalysts with the advantages of high activity, low cost, good conductivity, and excellent stability. Herein, a facile H2O2-assisted etching method is proposed for the fabrication of Mo-doped ultrathin Co9Se8@NiSe/NF-X heterojunctions with rich Se vacancies to boost electrocatalytic water oxidation. After step-by-step electronic structure modulation by Mo doping and Se vacancy engineering, the self-standing Mo-Co9Se8@NiSe/NF-60 heterojunctions deliver a current density of 50 mA cm−2 with an overpotential of 343 mV and a cell voltage of only 1.87 V at 50 mA cm−2 for overall water splitting in 1.0 M KOH. Our study opens up the possibility of realizing step-by-step electronic structure modulation of nonprecious OER electrocatalysts via heteroatom doping and vacancy engineering.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Ling Li,Zhiqiang Wei,Weizhe Liu,Meijie Ding,Zhiming Li
Reasonable construction of multi-pore heterogeneous structures and enhancement of synergistic interaction between metal ions are important means to improve the performance of supercapacitors . This work selected metal organic frameworks (MOF) as the sacrificial template, and Se-doped needle-like nanosphere heterostructures Se-CoSe 2 @ZnSe were successfully prepared by in situ growth and selenization treatment. The specific capacity of the Se-CoSe 2 @ZnSe-5 (CZS-5) electrode is up to 2469.12 F g −1 at 1 A g −1 , and the capacity retention rate of 3000 cycles at a current density of 10 A g −1 is 85.39 %. The CZS-5//AC hybrid supercapacitor has a high power density of 1280.00 W kg −1 at an energy density of 68.88 Wh kg −1 . The excellent electrochemical properties are attributed to the construction of Se-CoSe 2 @ZnSe heterostructure of needle-shaped nanospheres enhances the synergy between Zn and Co ions; the doping of selenium effectively improves the conductivity of the electrode material; selenium vacancies produced during selenization increase the activity of the active site. In addition, the density functional theory (DFT) calculation shows that Se-CoSe 2 @ZnSe-5 has higher density of states (DOS) near the Fermi energy level, which provides additional theoretical support for the improvement of electrochemical performance.
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Nano Today
·
2022
·
IF 18.962
Zhaoyang Guo,Yujia Xin,Lan Yang,Ruixue Ran,Guoyun Wan,Aijing Ma,Hongying Ren,Yinsong Wang,Xiaoying Yang
Radiotherapy (RT) is one of the important tools for clinical treatment of breast cancer. Currently, some nanoradiosensitizers have been developed for augmenting the therapeutic efficiency of RT. However, some limitations still exist for their further applications, such as oxygen dependence in hypoxic tumors, nonideal selectivity for tumors, and inevasible damages to normal tissues. To resolve these problems, a biomimetic nanoplatform was developed for efficient co-loading and precise co-delivery of oxygen and nanoradiosensitizer by taking advantage of large pore volumes and easy surface modification of dendritic large pore mesoporous silica nanoparticles (DLMSNs). The outer surfaces of DLMSNs were modified with citric acid for attaching firmly and chelating stably with ultrasmall Cu-Se-Au alloy nanoparticles possessing distinct radiosensitizing and photothermal conversion performances. The inner surfaces of DLMSNs were modified with perfluorosilane for loading perfluorohexane that has extraordinary oxygen-carrying capability to alleviate tumor hypoxia . White blood cells membranes were wrapped onto the surfaces of the resultant DLMSNs for promoting co-delivery of therapeutic agents targeting to tumor and reducing injuries to normal tissues. Biomimetic nanotherapeutic system thus prepared showed powerful suppression effects against breast cancer both in vitro and in vivo by intelligently integrating tumor-targeted delivery, oxygen supply, radiosensitizing and photothermal ablation.
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Journal of Energy Chemistry
·
2022
·
IF 13.599
Licheng Lou,Yuancai Gong,Jiazheng Zhou,Jinlin Wang,Xiao Xu,Kang Yin,Biwen Duan,Huijue Wu,Jiangjian Shi,Yanhong Luo,Dongmei Li,Hao Xin,Qingbo Meng
Photo-generated carrier recombination loss at the CZTSSe/CdS front interface is a key issue to the open-circuit voltage ( V OC ) deficit of Cu 2 ZnSnS x Se 4− x (CZTSSe) solar cells. Here, by the aid of an easy-handling spin-coating method, a thin PCBM ([6,6]-phenyl-C61-butyric acid methyl ester) layer as an electron extraction layer has been introduced on the top of CdS buffer layer to modify CZTSSe/CdS/ZnO-ITO (In 2 O 3 :Sn) interfacial properties. Based on Sn 4+ /DMSO (dimethyl sulfoxide) solution system, a total-area efficiency of 12.87% with a V OC of 529 mV has been achieved. A comprehensive investigation on the influence of PCBM layer on carrier extraction, transportation and recombination processes has been carried out. It is found that the PCBM layer can smooth over the CdS film roughness, thus beneficial for a dense and flat window layer. Furthermore, this CZTSSe/CdS/PCBM heterostructure can accelerate carrier separation and extraction and block holes from the front interface as well, which is mainly ascribed to the downward band bending of the absorber and a widened space charge region. Our work provides a feasible way to improve the front interfacial property and the cell performance of CZTSSe solar cells by the aid of organic interfacial materials.
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SOLAR ENERGY
·
2023
·
IF 6.7
Chunkai Wang,Bin Yao,Yongfeng Li,Zhanhui Ding,Ding Ma,Ting Wang,JiaYong Zhang,Dongxu Zhang,Yue Liu,Ruijian Liu
The physical properties of CdS buffer layers and the interface quality between CdS layer and Cu 2 ZnSn(S,Se) 4 (CZTSSe) absorber have a significant impact on the performance of CZTSSe solar cells. In the present work, five types of CZTSSe solar cells with conventional structure (denoted as CdS- x -cells, x = 55, 60, 65, 70 and 75) were fabricated by using CdS prepared at deposition temperatures of 55, 60, 65, 70 and 75 ℃, respectively, as buffer layer, and influence mechanism of the deposition temperature of CdS layers on power conversion efficiency (PCE) of the CdS- x -cells was investigated. It is found that the PCE of the CdS- x -cells increases from 8.52% to 10.36% as the deposition temperature rises from 55 to 60 ℃ but falls from 10.36% to 7.14% from 60 to 75 ℃. The analysis on the photovoltaic and electrical parameters indicates that the increase in PCE is predominantly derived from the decreased reverse saturated current density (J 0 ), followed by the decreased series resistance (R S ) and increased shunt resistance (R Sh ). The decreased PCE with the further increasing deposition temperature is mainly contributed from the increased J 0 , followed by the decreased R Sh and photogenerated current density (J L ). The influence mechanism of deposition temperature of the CdS layer on PCE is suggested via quantitatively analysis of influence of electrical, optical properties and crystal quality of CdS prepared at various deposition temperatures on J L and electrical parameters of CdS- x -cells. This work is helpful for improvement of PCE of CZTSSe solar cells by modification of properties of buffer layer.
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高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 51
·期 3
·904-909
·
IF 4.39
Chang Liu,He-Di Yang,Pei-Pei Hou,Yu Xiao,Yi Liu,Hua Lin
Inorganic chalcogenides containing cations with lone-pair electrons have attracted considerable attention because of their potential applications in photocatalysis. In this research, two new copper thioarsenates with the lowest Cu-to-As ratio in the quaternary X/Cu/As/Q (X = inorganic cations; Q = chalcogen) system, namely Cs3CuAs4Q8 (Q = S, Se), were obtained by a simple surfactant–thermal method at a low temperature. These two isostructural compounds belong to the monoclinic space group C2/c (no. 15) and are composed charge-balanced Cs+ cations and two-dimensional anionic [CuAs4Q8]3− layers. Notably, photo-electrochemical measurements indicate that Cs3CuAs4Q8 possesses a remarkable photocurrent response under simulated solar-light illumination. Further theoretical studies were performed to gain insights into the relationships between electronic structure and optical properties.
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PubMed
高影响因子
Acta Pharmaceutica Sinica B
·
2021
·
IF 11.614
Chuping Zheng,Aiping Wu,Xinyun Zhai,Hong Ji,Zhikang Chen,Xu Chen,Xiyong Yu
Reducing the inflammatory response is a major goal in the therapy of rheumatoid arthritis (RA). Herein, we integrated palladium nanoparticles (Pd NPs) with selenium nanoparticles (Se NPs) and obtained a multiple nanosystem ( [email protected] NPs) that could simultaneously scavenge hydroxyl radicals (⋅OH) and provide a photothermal effect. The [email protected] NPs were constructed by a simple self-assembly method in which Se NPs were electrostatically bonded to Pd NPs; hyaluronic acid (HA) was linked to the NPs by ester bonding to provide macrophage targeting ability. The experiments show that the combined therapy of eliminating ⋅OH with Se NPs and utilizing PTT with Pd NPs could effectively reduce the inflammatory response in macrophages more effectively than either individual NP treatment. In addition, the outer layer of HA could specifically target the CD44 receptor to enhance the accumulation of [email protected] NPs at the lesion, further enhancing the therapeutic effect. After treatment for 15 days, the [email protected] NPs nearly eliminated the inflammatory response in the joints of mice in an induced RA model, and prevented joint damage and degradation.
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高影响因子
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