Journal of Energy Chemistry
·
2024
·
IF 14
Xuejun Xu,Rutao Meng,Yue Liu,Han Xu,Jianpeng Li,Yi Zhang
Solution-processed chalcopyrite solar cells are widely regarded as a promising alternative method in reducing the cost compared with vacuum-based techniques. It is noted that the absorber layer usually needs to be prepared under a high insert pressure (∼1.6 atm) to suppress element loss or under a mild pressure but additional surface etching is needed for fabricating high efficient solar cell. Herein, a copper gradient structured precursor is proposed to prepare CuIn(S,Se) 2 (CISSe) film under a mild pressure (1.1 atm). The designed gradient Cu not only promotes crystal grain growth and tailors the defects, but also avoids the surface etching of the formed CISSe film for the fabrication of high efficient solar cells. Further, Cu gradient design decreases the conduction band offset of heterojunction, boosting the carriers transport across the p-n heterojunction. Accordingly, a 13.35% efficient CISSe solar cell, comparable to the high efficient CISSe solar cell prepared by this method under high pressure or with film surface etching, is fabricated. This work provides a facile pathway to fabricate high efficient solution-processed chalcopyrite solar cell, avoiding high selenization pressure and film etching, and shows huge potential for solution-processed copper-based solar cells.
研究领域:
材料科学
·
可再生能源
✓ 已验证
DOI
高影响因子
SUPERLATTICES AND MICROSTRUCTURES
·
2019
·
IF 2.385
Yong Cui,Junye Tong,Hongmei Shao,Gang Wang,Daocheng Pan
Novel semiconductor Cu 2 BaSn(S,Se) 4 thin film with orthorhombic structure has been successfully fabricated via solution process. XRD、EDS、XPS and SEM were used to investigate the structure、elemental composition、valence states and morphology of the Cu 2 BaSn(S,Se) 4 thin film . Different selenization temperatures that affected CBTSSe thin film quality were investigated. The photoresponse property of Cu 2 BaSn(S,Se) 4 thin film indicated that it had potential application in low-cost thin film solar cells. The solution process to fabricate Cu 2 BaSn(S,Se) 4 /CdS heterojunction thin film solar cells demonstrated that Cu 2 BaSn(S,Se) 4 thin film could be applied as absorb layer in the thin film solar cells.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2021
·Vol. 127
·期 1
·1-13
·
IF 2.584
Xie Ping,Li Bin,Chen Gang,Zheng Weimin,Ma Xiaofeng,Luo Haihan,Liu Dingquan
The dielectric function of phase-change materials (PCMs) presents a tremendous difference for the amorphous and crystalline states. Therefore, the measurement of the mid-infrared transparency of thin films of PCMs will provide a cost-efficient method to reveal the dependence of amorphous-crystalline phase transition on their compositions. Although Sb–Te–Se system has shown the advantages of the high speed, low power consumption and long retention life, the information on the mid-infrared transparency of Sb–Te–Se thin films is still insufficient. In our investigation, combinatorial materials libraries of Sb–Te–Se thin films were synthesized. The composition and mid-infrared spectral transmittance of each pixel of Sb–Te–Se thin film in the library were characterized using the energy dispersive X-ray analysis (EDX) and Fourier-transform infrared (FTIR) spectrometer, respectively. The in-depth chemical composition for randomly selected pixels was identified using secondary ions mass spectroscopy (SIMS). The crystallographic structure of some pixels was also identified using micro-area X-ray diffraction (μ-XRD). It can be found that, with the change of composition in Sb–Te–Se thin films, their mid-infrared spectral transmittance can be organized into three distinctive groups, corresponding to amorphous Sb–Se, Sb 2 Se 3 orthorhombic structure and Sb 2 Te 3 rhombohedral structure, respectively. Therefore, the amorphous-crystalline phase transition and the phase-change from the orthorhombic structure of Sb 2 Se 3 to the rhombohedral structure of Sb 2 Te 3 can be completely reflected in the mid-infrared spectral transmittance of Sb–Te–Se thin films.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2019
·
IF 1.859
Xunan Shen,Chao Zhang,Yang Feng,Wei Li,Guifeng Chen,Chengchun Tang
In this work, Cu 2 ZnSn(S,Se) 4 thin films were prepared by sol-gel methods based on dimethyl sulfoxide solutions with H 3 BO 3 additive. The morphological, structural, compositional and photovoltaic properties of the Cu 2 ZnSn(S,Se) 4 thin films were investigated. We found that the formation of voids, cracks and fine-grain layers were suppressed effectively with slight H 3 BO 3 . Based on the decrease of these micro defects, the series resistance decreased and shunt resistance increased largely. And the band gap of CZTSSe solar cells broaden from 1.031 eV to 1.064 eV. The best solar cell showed an open-circuit voltage of 440.1 mV, short-circuit current density of 28.15 mA/cm 2 , fill factor of 58.81% and power conversion efficiency of 7.27% under air mass 1.5 (100 mW/cm 2 ) illumination.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Hao Zhou,Yikai Wang,Hua Wang,Heye Fu,Ranran Li,Yuekai Zhang,Hong Zhao,Cuishuang Jiang,Tingting Yu,Xia Sun,Maoshuai He,Wenxian Wei,Tao Yang
Hydrogen has garnered attention as a promising carbon-free energy carrier capable of addressing escalating energy demands and environmental concerns. However, hydrogen production via alkaline water electrolysis is hindered by the sluggish kinetics of oxygen evolution reaction (OER). Although Ni₃Se₂ has attracted interest as a non-precious metal-based OER catalyst, its performance remains suboptimal. In this work, we present a trimetallic-doped electrocatalyst, CoWCe-Ni₃Se₂, which exhibits outstanding OER performance in alkaline media. The catalyst demonstrates only 204 mV to achieve a current density of 100 mA cm⁻², along with a notably small Tafel slope of 33.59 mV dec⁻¹. Furthermore, it shows exceptional operational durability, maintaining 95% of its initial activity over 90 hours of continuous electrolysis. Mechanistic insights derived from density functional theory (DFT) calculations reveal that the co-doping of W and Ce facilitates the adsorption of critical *OOH intermediates and significantly lowers the energy barrier of the rate-determining step (RDS). The enhanced catalytic performance is attributed to the improved electrical conductivity, increased active surface area, and optimized adsorption/desorption behavior of reaction intermediates. Beyond introducing a highly active and stable OER electrocatalyst, this study provides a fundamental understanding of the synergistic effects of multi-element doping for the rational design of high-performance catalysts.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Jun Guo,Yu-Ke Zhu,Lin Chen,Zi-Yuan Wang,Zhen-Hua Ge,Jing Feng
Bi 2 S 3 -based alloys are considered promising thermoelectric materials due to their large Seebeck coefficient and low lattice thermal conductivity . However, low electrical conductivity usually leads to poor electrical transport properties, which seriously restricts their further application in thermoelectric refrigeration and/or power generation. In this work, Bi 2 S 3 with high electrical transport properties is synthesized hydrothermally via Se and Cl co-doping. The maximum electrical conductivity value of 483 S cm −1 was obtained for the Bi 2 S 2.4 Se 0.4 Cl 0.20 sample at room temperature. The significant improvement of electrical conductivity gives rise to a high average power factor of 411 μW m −1 K −2 during the measuring temperature range and a peak value of 456 μW m −1 K −2 at 673 K. Benefiting from the largely improved electrical transport properties, a superior ZT value of approximately 0.66 and ZT ave . of 0.36 were obtained for Bi 2 S 2.4 Se 0.4 Cl 0.20 , and the theoretically calculated conversion efficiency reached 5.7%. The results indicate that Bi 2 S 3 is a promising candidate for thermoelectric applications at medium temperatures.
研究领域:
材料科学
·
热电学
✓ 已验证
产品关联
DOI
高影响因子
OPTICS LETTERS
·
2023
·Vol. 48
·期 21
·5471-5474
·
IF 3.6
Wenlong Xu,Wenlong Xu,Yongchang Guo,Yongchang Guo,Yongchang Guo,Can Li,Can Li,Jie Fu,Jie Fu,Zhibiao Ma,Zhibiao Ma,Zhifan Hao,Zhifan Hao,Hui Wang,Hui Wang,Hui Wang,Haizheng Tao,Jianqiang Li,Jianqiang Li,Jianqiang Li,Jianqiang Li
We have innovatively introduced the pulsated orifice ejection method into the preparation of glass fibers, successfully preparing high-purity Ge28Sb12Se60 glass fibers. These fibers have a smooth surface, uniform elemental distribution, and excellent bending properties, with a minimal bending radius of 2 mm. In the infrared spectrum from 2.5 to 13.5 µm, the fibers achieve 65% transmission. Additionally, the fibers possess a density of 4.586 g/cm3, a diameter of 35 µm, a glass transition temperature (Tg) of 369°C, and an onset crystallization temperature (Tx) of 557°C. We have also measured the surface tension of the glass fibers, finding values from 0.288 N/m to 0.124 N/m as temperatures rose from 450°C to 500°C. The POEM holds the potential to achieve fiber cores of lengths up to hundreds of meters in theory. Our work provides a distinctive perspective for the preparation of glass fibers.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 19
·8287-8297
·
IF 3.5
Liu Yang,Jiang Lu,Jiang Ruonan,Liu Huanhuan
Researchers are showing a great deal of interest in hydrogels due to the presence of high-water content, self-healing variants. Despite this, research into the development of smart hydrogels that have the combination of toughness, self-healing, and responsiveness to external stimuli is still lacking. Here, tough, and intelligent nanocomposite (NC) hydrogels have been developed by utilizing modified nano-crosslinker by means of gold-selenium (Au-Se) coordination interaction. The NC hydrogels demonstrate remarkable elasticity and strength, even when exposed to notches. With the optimal formulation, the nanocomposite hydrogel can achieve a maximum elongation of 1970%, a maximum fracture stress of 2.48 MPa, and a toughness of up to 9.95 MJ/m 3 , thanks to the dynamic gold crosslinks with improved branching. The presence of this structural attributes facilitates efficient energy dissipation within the hydrogel system. Combining Au-Se interaction as a healing element and the remarkable optothermal effect of nanoparticles, NC hydrogels can be quickly self-healed in near-infrared light exposure of 2 min, achieving a self-healing efficiency of 91%. Additionally, the hydrogels demonstrate repair potential when exposed to microwave irradiation, acid solution, and ultrasound stimulus. Moreover, a multi-responsive hydrogel composed of photothermal gold nanostructures can serve as a light-controlled drug carrier, which has smart drug release ability under external light stimulation. The advantageous properties of hydrogel make it a great option for biomedical and engineering fields.
研究领域:
材料科学
·
生物医学工程
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Electronic Materials
·
2018
·Vol. 5
·期 2
·1800683
·
IF 5.466
Weihuang Wang,Xiaomin Wang,Guilin Chen,Liquan Yao,Xiaojuan Huang,Tao Chen,Changfei Zhu,Shuiyuan Chen,Zhigao Huang,Yi Zhang
Antimony sulfide-selenide Sb 2 (S,Se) 3 as a promising absorber material has drawn extensive attention owing to its rewarding photoelectric properties, low toxicity, and earth abundant components. Here, an available and highly effective method, in situ hydrothermal growth accompanied with postselenization, is successfully applied to fabricate Sb 2 (S,Se) 3 solar cells. The rationale for the preparation of Sb 2 S 3 precursors by the hydrothermal method is discussed, and detailed characterization of Sb 2 (S,Se) 3 films selenized with different temperatures is also carried out. Finally, a solar cell with structure of FTO/CdS/Sb 2 (S,Se) 3 /Spiro-OMeTAD/Au is fabricated, which delivers an encouraging 6.14% efficiency with V oc of 732 mV, J sc of 14.6 mA cm −2 , and fill factor of 60.8%. This work provides valuable references for further development and improvement of Sb 2 (S,Se) 3 solar cells.
研究领域:
材料科学
·
太阳能
·
纳米技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Misganaw Alemu Zeleke,Dong-Hau Kuo
The quaternary chalcogenide Cu 2 Zn(Sn 1-x Ge x )(S,Se) 4 bulks, where x is G e / [ G e + S n ] molar ratios of 0, 0.15, 0.30, and 0.45 were synthesized via reactive liquid phase sintering at 600 °C for 30 min in the tube furnace and characterized systematically. Together with Sb 2 S 3 as a reactive liquid phase sintering aid, the effects of Ge incorporation on densification, grain boundary, crystal phase purity, crystalline size, and electrical properties were studied. The morphology of the resulted Cu 2 Zn(Sn 1-x Ge x )(S,Se) 4 bulk was found to be more densified and compacted at G e / [ G e + S n ] molar ratio of 0.15 compared to the rests. The X-ray diffraction peaks were shifted towards a higher angle as Ge fraction was increased. The hole concentrations for the entirely p-type bulks were determined to be 3.67 × 10 18 , 1.40 × 10 18 , 1.28 × 10 18 , and 8.90 × 10 17 cm −3 at G e / [ G e + S n ] molar ratios of 0, 0.15, 0.30, and 0.45, respectively. The effects on conductivity and mobility were consistent with their interrelations. Hence, the synthesis and study of Ge incorporated Cu 2 ZnSn(S,Se) 4 bulk using powder technique allows identifying the composition which is expectedly more important for the fabrication of thin film solar cells.
研究领域:
材料科学
·
太阳能电池技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2020
·
IF 16.602
Qing Yu,Jiangjian Shi,Linbao Guo,Biwen Duan,Yanhong Luo,Huijue Wu,Dongmei Li,Qingbo Meng
For Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells, eliminating multi-layer crystallization is a key issue of achieving high quality CZTSSe absorber layers and high cell performance. In this work, the formation mechanism of the multi-layer crystallization is revealed, that is, the reaction between CZTS and Mo may give the secondary phase, which subsequently acts as crystal nucleus to facilitate the CZTSSe crystal growth at back interface (Mo/CZTSSe), leading to multi-layer crystallization. By introducing MoO 3 isolating layer, this undesired reaction can be well prevented, and high quality single-layer crystals are obtained. This absorber film with fewer defects and secondary phases exhibits better semiconductor properties . Based on this regulated CZTSSe absorber layer, 11.68% (active area: 0.16092 cm 2 ) and 10.69% (mask area: 0.17586 cm 2 ) certified power-conversion-efficiency have been achieved with significant increase in the open-circuit voltage and fill factor.
研究领域:
材料科学
·
光伏技术
·
半导体物理
·
太阳能
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2020
·
IF 4.473
Yiming Wang,Yanchun Yang,Chengjun Zhu,Hongmei Luan,Ruijian Liu,Lei Wang,Chenxi Zhao,Xiaogong Lv
Substitution of Zn with Mg has been reported to suppress CuZn defects, which can improve the photoelectric performance of Cu2ZnSn(S,Se)4 (CZTSSe) photovoltaic devices. In our work, the electrical property enhancement of an absorbing layer can be found by incorporating Mg content into the as-prepared precursor solution, forming an alloyed Cu2MgxZn1-xSn(S,Se)4 (CMZTSSe) phase and increasing the photoelectric performance of devices. By adjusting the doping ratio of Mg, we systemically study the impact of Mg content on the crystal structure, thickness, and electrical properties of the Cu2MgxZn1-xSn(S,Se)4 absorbing layer. Also, the photoelectric performance of Cu2MgxZn1-xSn(S,Se)4 solar cells have a large improvement, and the optimal photoelectric conversion efficiency (PCE) of 7.76% for devices is obtained. Our results offer the finding that Mg doping can optimize the electrical properties of Cu2ZnSn(S,Se)4 photovoltaic devices.
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
危险品化学品经营许可证（带存储）