JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Chang Miao,Meiling Ma,Yingrui Sui,Yue Cui,Zhanwu Wang,Lili Yang,Fengyou Wang,Xiaoyan Liu,Bin Yao
Environmentally benign and earth-abundant constituent’s kieserite Cu 2 ZnSn (S, Se) 4 (Cotises) is considered as a hopeful photovoltaic material. Unfortunately, the severe tail state caused by various harmful deep defects in CZTSSe absorber prevents further development of its device efficiency. Here, we report firstly that the Co was incorporated into CZTSSe films to form the Cu 2 Co x Zn 1-x Sn (S, Se) 4 (CCZTSSe) films using a two-step annealing and solution-processing technique method. Through optimized the Co/(Co+Zn) ratio, the CCZTSSe film has excellent good surface morphology and single-phase composition. Appropriate amount of Co elements replacing Zn elements in CZTSSe films can effectively reduce the degree of Cu-Zn disorder, thus inhibiting [2Cu Zn +Sn Zn ] defect clusters and Cu Zn defects. The detrimental deep defects located in the film were effectively passivated to reduce electrostatic potential fluctuations, resulting in relief of the trailing state. Therefore, a champion device having an efficiency of 7.50 % with a fill factor (FF) of 61.00 % was achieved from CCZTSSe with 3 % Co content. This work provides new insights into the impacts of Co doping in CZTSSe by a solution processed method and offers a deeper comprehension of the origin of the efficiency enhancement of CCZTSSe devices.
研究领域:
材料科学
·
能源技术
·
半导体物理
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Yumeng Lian,Yi Wang,Dun Zhang,Likun Xu
Developing a stable and reusable material for antibacterial application in an enzyme-like system is still a challenge. Herein, Mn–Co–S–Se (MnCo 2 S x Se 4–x )/Ni foam (NF) are synthesized by introducing S 2– and Se 2– in MnCo 2 O 4 /NF with a facile hydrothermal approach. With the different molar ratios of S/Se, the surface morphology of MnCo 2 S x Se 4–x /NF shows different growth and the catalytic activity also presents regular changes. MnCo 2 S 3.1 Se 0.9 /NF possesses a high enzyme-like ability with higher V max than natural horseradish peroxidase . Due to the outstanding peroxidase-like activity, MnCo 2 S 3.1 Se 0.9 /NF also exhibits broad-spectrum bactericidal performance towards Escherichia coli and Staphylococcus aureus which stems from the formation of ·O 2 – from H 2 O 2 . In the reutilization experiment, the enzyme-like activity keeps a stable value after 25 cyclic tests and the bactericidal performance is still stable after 10 cyclic tests, proving that MnCo 2 S 3.1 Se 0.9 /NF possesses relative stability and reusability. This research showed the great prospect of new energy and environmental catalysis.
研究领域:
生物材料学
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环境催化
·
纳米酶研究
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Siqi Wang,Zhi Yang,Yuejun Sun,Yu Xiao,Li-Dong Zhao
PbTe-based thermoelectric materials are considered to be a medium-temperature thermoelectric candidates and the high-performance n -type PbTe is urgently to be developed to match its p -type counterpart on account of practical application. Herein, we firstly optimized the carrier density of n -type PbTe through Sb doping, and obtained a maximum ZT value of ∼1.0. Then, based on the optimized carrier density, we introduced ternary compounds AgSb(Se, Te) 2 to suppress the lattice thermal conductivity . Minimum lattice thermal conductivity of n -type PbTe was reduced as low as ∼0.53 W m −1 K −1 and ∼0.62 Wm −1 K −1 through introducing AgSbSe 2 and AgSbTe 2 , respectively. Combining the maintained electrical properties with suppressed thermal conductivity , maximum ZT values ∼1.2 and ∼1.3 were obtained in PbTe+2%AgSbSe 2 and PbTe+2%AgSbTe 2 , respectively. This work provides an effective strategy of synergistically balancing charge and phonon transports in n -type PbTe with ternary AgSb(Se, Te) 2 compounds.
研究领域:
材料科学
·
热电转换
·
凝聚态物理
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半导体物理
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功能材料
·
能量转换材料
✓ 已验证
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2023
·Vol. 6
·期 1
·1-9
·
IF 20.1
Du Peng,Lin Chaoliang,He Xian,Zheng Zhichuan,Xie Xinyu,Huang Kai,Lei Ming,Tang Haolin
Developing relatively cost-effective and high-performance Ru-based composites as electrocatalysts for acidic oxygen evolution has become the critical step toward emerging renewable energy conversion, in which exploring controllable synthetic strategies and investigating the intrinsic nature by non-metallic interfacial modulation is highly desirable. In this work, a facile tandem process is proposed by ball-milling and thermal annealing for the scalable synthesis of Ru–O–Se nanocomposites with in-situ formed crystalline RuSe 2 and metallic Ru heterostructures on a RuO 2 substrate. The optimized RuO x Se y -800 sample has been proved to have an excellent OER activity and long-term stability in an acidic electrolyte due to its suitable microscopic morphology and phase composition, along with a relatively smaller Tafel slope of 45.4 mV dec −1 compared with commercial RuO 2 and most similar catalysts reported in the literature. The outstanding acidic OER performance can be ascribed to the enhanced electron transfer and more active site exposure by controllable selenization. This work paves a novel way for the design and large-scale production of various non-metallic modified composite catalysts for extensive applications of energy conversion and storage.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 42
·22791-22802
·
IF 14.511
Xing-Ye Chen,Muhammad Ishaq,Nafees Ahmad,Rong Tang,Zhuang-Hao Zheng,Ju-Guang Hu,Zheng-Hua Su,Ping Fan,Guang-Xing Liang,Shuo Chen
The existence of various detrimental defects inside the absorber layer is a major obstacle limiting the performance of kesterite Cu2ZnSn(S,Se)4 (CZTSSe) thin-film solar cells. Cationic substitution is a viable strategy for overcoming this challenge and has drawn tremendous research attention. In this work, a dual-cation substituted CZTSSe involving Ag and Ti to separately occupy partial Cu and Sn lattice sites is proposed. Under 6% Ag and 1% Ti dual-cation substitution, the champion CZTSSe device delivers a highly interesting efficiency of 12.73%, accompanied by an outstanding VOC of 530 mV. Further investigation demonstrates that Ag introduction can improve the density and crystallinity of CZTSSe thin films while decreasing the concentration of CuZn acceptor defects. Further Ti substitution can effectively eliminate fine grains and reduce the defect density of CuSn and [2CuZn + SnZn] defects, as well as the core level defects. This work explores the synergistic effect of Ag, Ti dual-cation substitution in CZTSSe solar cells for the first time, and the clarified device performance improvement mechanism opens up promising possibilities for the bright development of CZTSSe thin-film photovoltaic technology.
研究领域:
材料科学
·
光伏技术
·
半导体物理
✓ 已验证
DOI
高影响因子
Advanced Science
·
2023
·
IF 15.1
Quanzhen Sun,Chen Shi,Weihao Xie,Yifan Li,Caixia Zhang,Jionghua Wu,Qiao Zheng,Hui Deng,Shuying Cheng
Ion doping is an effective strategy for achieving high-performance flexible Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells by defect regulations. Here, a Li&Na co-doped strategy is applied to synergistically regulate defects in CZTSSe bulks. The quality absorbers with the uniformly distributed Li and Na elements are obtained using the solution method, where the acetates (LiAc and NaAc) are as additives. The concentration of the harmful Cu Zn anti-site defects is decreased by 8.13% after Li incorporation, and that of the benign Na Zn defects is increased by 36.91% after Na incorporation. Synergistic Li&Na co-doping enhances the carrier concentration and reduces the interfacial defects concentration by one order of magnitude. As a result, the flexible CZTSSe solar cell achieves a power conversion efficiency ( PCE ) of 10.53% with certified 10.12%. Because of the high PCE and the homogeneous property, the Li&Na co-doped device is fabricated to a large area (2.38 cm 2 ) and obtains 9.41% PCE . The co-doping investigation to synergistically regulate defects provides a new perspective for efficient flexible CZTSSe solar cells.
研究领域:
材料科学
·
太阳能
·
半导体物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 7
·2209-2217
·
IF 4.174
Wenyan Kong,Qi Wang,Guoying Deng,Hang Zhao,Linjing Zhao,Jie Lu,Xijian Liu
Photothermal therapy (PTT) is a promising treatment for tumors due to its efficiency and non-invasiveness. However, during the PTT treatment, reactive oxygen species (ROS) are produced in response to hyperthermia and thus harm the neighboring normal cells. In this work, a multifunctional theranostic agent (Se@SiO2@Au-PEG/DOX NCs) was exploited to solve this problem by introducing selenium, which can efficiently prevent normal cells from oxidative damage by scavenging reactive oxygen species during photothermal therapy. In addition, the Se@SiO2@Au-PEG/DOX nanocomposites (NCs) not only exhibited excellent properties of combined chemo-thermal synergistic therapy, but also showed no appreciable toxicity towards normal tissues due to the protective effect for continuous release of selenium. Thus, the fabricated Se@SiO2@Au-PEG/DOX NCs provide an integrated solution to overcome the limitations of selenium and PTT, and demonstrate great prospects as a safe and highly reliable theranostic agent.
研究领域:
癌症治疗
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材料科学
·
纳米医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy & Environmental Science
·
2024
·
IF 32.4
Cong Liu,Anweng Gong,Chen Zuo,Tao Liu,Xiaoyang Liang,Donglou Ren,Kai Shen,Jianzha Zheng,Qifan Xue,Zhiqiang Li,Ruud E. I. Schropp,Bingsuo Zou,Yaohua Mai
High-quality heterojunctions are crucial for achieving high power conversion efficiency (PCE) in the antimony selenosulfide (Sb2(S,Se)3) solar cells. Here, we introduce lithium fluoride (LiF) doping of the precursor solution to improve the conductivity, morphology, and n-type characteristics of cadmium sulfide (CdS) films. In addition, Li-ions have high mobility, which enhances in situ diffusion into the Sb2(S,Se)3 absorber layer during subsequent hydrothermal deposition. Li effectively passivates selenium vacancies (VSe) and antimony anti-site (SbS) defects through the formation of Li–S(e) bonds. This lithiation process not only realizes a twofold optimization of the CdS buffer layer and the Sb2(S,Se)3 absorber layer, but also yields a favorable energy level arrangement and a wider depletion region at the CdS/Sb2(S,Se)3 heterojunction. By this way, we have achieved a champion PCE of 10.76% compared to a certified value of 10.50% for Sb2(S,Se)3 solar cells, which is the highest certified efficiency reported for Sb-based solar cells so far. This study provides a convenient method to optimize dual functional layers and heterojunctions for high-performance Sb2(S,Se)3 solar cells.
研究领域:
材料科学
·
能源科学
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2022
·Vol. 6
·期 6
·2101032
·
IF 9.173
Junjie Fu,Qingwen Tian,Yachao Du,Qianqian Chang,Yanping Guo,Shengjie Yuan,Zhi Zheng,Sixin Wu,Shengzhong (Frank) Liu
The photovoltaic performance of the kesterite Cu 2 ZnSn(S,Se) 4 solar cells is still far below its predecessor CuInGaSe 2 . One major reason is its severe interface nonradiative recombination at the mismatched Cu 2 ZnSn(S,Se) 4 /CdS heterojunction interface, leading to a large open-circuit voltage loss. Herein, a distinctive indium-incorporation (DI) strategy is developed to deposit an In 1− x Cd x S buffer layer for optimizing the heterojunction interface. The results reveal that adopting this DI method can effectively inhibit the formation of an undesirable secondary phase, and indium can be more easily doped into the bulk lattice of CdS to form additional beneficial shallow donor In Cd defects, which significantly improve the electrical properties of the CdS layer and the quality of the heterojunction interface. Besides, the energy band alignment is adjusted to facilitate the extraction and transfer of interfacial charges, and thus reducing the nonradiative charge recombination at the front Cu 2 ZnSn(S,Se) 4 /CdS heterojunction interface. Consequently, the combination of the above enhances the power conversion efficiency from 10.2% to 12.4%, one of the highest for this type of cells, which corresponds to an open-circuit voltage deficit ( V oc,def ) reduction to as low as 0.54 V. The strategy provides a rational design for optimizing the heterojunction interface of Cu 2 ZnSn(S,Se) 4 solar cells to reduce voltage loss and achieve high efficiency.
研究领域:
材料科学
·
光伏技术
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 50
·期 1
·391-397
·
IF 4.174
Yunmei Du,Huimin Zhao,Wensi Wang,Yu Yang,Minghui Wang,Shaoxiang Li,Yanru Liu,Lei Wang
A heterogeneous structure formed by coupling two or more phases can reinforce the activity of active sites and expedite electron transfer, which is conducive to boosting its electrocatalytic activity. Herein, we designed nickel foam supported (NiCo2)Se@Ni(OH)2 (NCS@NH) heterojunction nanosheets by a two-step method. First of all, the NiCo2S4@Ni(OH)2 (NiCo2S4@NH) nanosheets coated on nickel foam were acquired via a hydrothermal method. In the selenization treatment that followed, NiCo2S4@NH was converted into NCS@NH heterogeneous nanosheets in which the selenide nanoparticles decorated on the surface of the Ni(OH)2 nanosheets formed heterojunction interfaces, and the heterogeneous structure could accelerate electron transfer, thus improving the catalytic activity. The Ni(OH)2 nanosheets can adequately contact the electrolyte and promote the decomposition of water. Meanwhile, the thickness of the Ni(OH)2 nanosheets gradually decreases with the increase of Co doping (1.5–2.5 mmol), consequently affecting the HER properties. Notably, when the amount of Co salt added is 2 mmol, NCS@NH exhibited superior HER properties (with a voltage of 253 mV at 100 mA cm−2) and excellent stability for 24 h.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
·
2025
·Vol. 40
·期 3
·035006
·
IF 2.1
Xingyu Zhang,Lingling Wang,Yawei Wang,Xiangyang Zhao,Rong Fang,Rui Guo,Yue Zhou,Xintong Zhang,Yichun Liu
Modifying the back contact interface plays a key role in improving the efficiency of Cu2ZnSn(S,Se)4 (CZTSSe) solar cells. Aiming at the phase decomposition and carrier recombination issues in the CZTSSe/Mo back contact interface, an ultra-thin Mg(OH)2 intermediate layer was introduced between the Mo substrate and the CZTSSe absorber layer. The Mg(OH)2 intermediate layer effectively suppressed the interface phase decomposition reactions and inhibited the generation of interface secondary phases. Meanwhile, during the high-temperature selenization process, the Mg2+ doped into CZTSSe at the back contact interface, reducing the defects and band offset at the CZTSSe/Mo interface. The performance of the device was improved, with a significant increase in efficiency compared to the control device. This work highlights the modification effect of Mg(OH)2 for improving back contact and also provides an easy-handling method to achieve high-performance CZTSSe solar cells.
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Liupeng Zhao,Xueqin Gong,Wei Tao,Tianshuang Wang,Xiaomin Liu,Fangmeng Liu,Xu Yan,Chenguang Wang,Peng Sun,Geyu Lu
A challenge for low-valence cation doping in SnO 2 materials is that the sharply elevated baseline resistance is detrimental to sensor stability and the subsequent signal acquisition. In contrast, Homovalent doping has little effect on resistance but the effective homovalent dopant is few. Herein, we find the non-metallic element Se is prone to form cationic Se Sn defects in SnO 2 , which can improve the sensitivity of the SnO 2 -based sensors with a moderate rise in baseline resistance. The homovalent Se doping make the species and ratio of adsorbed oxygen on Se-doped SnO 2 surface basically unchanged after doping. Further experiments and theoretical calculations confirm the sensitization mechanism of Se-doped SnO 2 can be attributed to the higher activity of adsorbed oxygen on its surface. Therefore, the sensor based on Se-doped SnO 2 can have sufficient sensing-reactions and charge transfer at a temperature close to the maximum value of the baseline resistance, which makes the sensor better to sensitize the target gases requiring high temperature for sensing-reactions. This noble metal-like activation behavior of Se dopant is derived from the easier breaking of Se-O bond compared to Sn-O bond during CO oxidation which provides a new basis for the selection of dopants from the perspective of bond energy.
研究领域:
材料科学
·
传感器技术
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）