Solar RRL
·
2019
·Vol. 4
·期 1
·1900410
·
IF 0
Qiong Yan,Shuying Cheng,Xue Yu,Hongjie Jia,Junjie Fu,Caixia Zhang,Qiao Zheng,Sixin Wu
Partial cation substitution is an effective way to inhibit defects and carrier recombination, which can improve the efficiency of Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells. Herein, flexible Cu 2 Zn 1− x Cd x Sn(S,Se) 4 ( x = 0–15%) solar cells are fabricated on Mo foils with partial Cd substitution for Zn via a green solution-process. The best device performance can be achieved when Cd/(Zn + Cd) = 8%, with an efficiency up to 6.49% and a significantly improved device repeatability. The E U decreases from 24 to 15 meV, indicating that antisite defects and band tailings are effectively suppressed. C – V data reveal that W d and V bi are enhanced after doping Cd, resulting in a stronger built-in electric field which facilitates Fermi-level splitting and hence increases band bending of the absorber toward the junction interface. Furthermore, the mechanism of current shunting is studied using an equivalent circuit model with three parallel current pathways to fit J – V curves. The key parameters for the solar cell diode such as A , J 0 , and R sh are significantly improved by partially substituting Zn with Cd, demonstrating that current shunting loss is suppressed and the junction quality is improved, resulting in a significant improvement in device repeatability.
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DOI
RSC Advances
·
2018
·Vol. 8
·期 49
·27686-27694
·
IF 2.936
Xue Yu,Shuying Cheng,Qiong Yan,Jinling Yu,Wen Qiu,Zhengji Zhou,Qiao Zheng,Sixin Wu
Cation substitution plays a crucial role in improving the efficiency of Cu2ZnSn(S,Se)4 (CZTSSe) solar cells. In this work, we report a significant efficiency enhancement of flexible CZTSSe solar cells on Mo foils by partial substitution of Cu+ with Ag+. It is found that the band gap (Eg) of (Cu1−xAgx)2ZnSn(S,Se)4 (CAZTSSe) thin films can be adjusted by doping with Ag with x from 0 to 6%, and the minimum Eg is achieved with x = 5%. We also found that Ag doping can obviously increase the average grain size of the CAZTSSe absorber from 0.4 to 1.1 μm. Additionally, the depletion width (Wd) at the heterojunction interface of CAZTSSe/CdS is found to be improved. As a result, the open-circuit voltage deficit (Voc,def) is gradually decreased, and the band tailing is suppressed. Benefiting from the enhanced open-circuit voltage (Voc), the power conversion efficiency (PCE) is successfully enhanced from 4.34% (x = 0) to 6.24% (x = 4%), and the Voc,def decreases from 915 to 848 mV.
研究领域:
光伏技术
·
材料科学
·
薄膜太阳能电池
·
半导体材料
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2014
·
IF 2.045
Jun-su Jin,Xing Fan,Haifei Zhang,Yi-wei Wang,Ze-ting Zhang
The equilibrium solubilities of 4-aminosalicylic acid (PAS) in supercritical carbon dioxide (SCCO2) and subcritical 1,1,1,2-tetrafluoroethane (R134a) are crucial to the process of supercritical and subcritical extraction. After reliability tests of the experimental apparatus were carried out and confirmed, measurements of the solubilities of PAS in SCCO2 and subcritical R134a were implemented from (11.0 to 21.0) MPa at temperatures of (308 to 328) K by the dynamic method in SCCO2 and from (5.0 to 15.0) MPa at temperatures of (308 to 328) K by the static method in subcritical R134a, respectively. It was found that the solubility of PAS is much higher in subcritical R134a than in SCCO2 under the same operational conditions (temperature and pressure). The solubility enhancement factor (δ) was calculated and analyzed. Four density-based models (Chrastil, K-J, M-S-T, and S-S) were used to correlate the PAS solubility data in SCCO2 and subcritical R134a. The calculated results showed that the reasonable agreement was obtained with the experimental solubility data.
研究领域:
化学工程
·
热力学
·
超临界流体技术
·
药剂学
·
分离过程
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DOI
高影响因子
Nanoscience and Nanotechnology Letters
·
2015
·Vol. 7
·期 11
·939-944
·
IF 1.431
Zhu Linhua,Zhu Qidong,Zhao Jie,Dai Chunyan
p-tert-Butylcalix[4]arene (PC4), de-tert-butyl calix[4]arene (DC4) and sulfonated calix[4]arene (SC4) were synthesized by means of acetalization, dealkylation and sulfonation. Their structures and morphologies were characterized with fourier transform infrared spectrometry (FTIR),
nuclear magnetic resonance spectroscopy (NMR) and scanning electron microscopy (SEM). The thermal properties of three calix[4]arenes were investigated with thermogravimetric analysis (TGA) and differential thermal gravity (DTG). TGA and DTG curves of calixarenes indicate that the thermal weight
loss process of calix[4]arenes includes 2 stages: the stage of inclusion complex loss and the stage of thermal decomposition. According to Kissinger method, the average apparent activation energies (E
a
) of thermal decomposition of PC4, DC4 and SC4 are 299.86 kJ/mol,
246.09 kJ/mol and 129.28 kJ/mol, respectively. Furthermore, according to the Phadnis-Deshpande model, the decomposition kinetic models of three calix[4]arene follow nucleation and nuclei growth mechanism, phase boundary mechanism and power law mechanism, respectively.
研究领域:
材料科学
·
热分析
·
有机合成
·
纳米材料
·
动力学
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高影响因子
CHEMISTRY & BIODIVERSITY
·
2026
·Vol. 23
·期 6
·e71435
·
IF 2.9
Xu-Xiang Zhang,Zi-Teng Wang,Wei Yu,Li-Jing Min,Zi-Yuan Yang,Na-Bo Sun,Xing-Hai Liu
A novel series of 2,3-dimethyl-8-fluoro-6-tert-butylquinoline-4-ester derivatives ( 5a–5p ) were designed and synthesized based on a quinoline scaffold. Their structures were confirmed by 1 H NMR, 1 3 C NMR, IR, and HRMS, and compound 5g was further characterized by single-crystal x-ray diffraction. The in vitro antifungal activities of the target compounds were evaluated against ten phytopathogenic fungi, with tebufloquin as the positive control. Several derivatives showed selective activity against Magnaporthe oryzae , among which compounds 5j , 5l , and 5o exhibited 88.9% inhibition at 50 ppm. Preliminary structure–activity relationship analysis suggested that electron-withdrawing substituents on the benzoyl moiety were favorable for activity. Hirshfeld surface analysis, DFT calculations, ADMET prediction, and molecular docking were further performed to investigate the structural features, electronic properties, and possible binding mode of the representative active compound. These results provide useful guidance for the further optimization of fluorinated quinoline-4-ester derivatives as candidate fungicides. Graphical A series of fluorinated quinoline-4-ester derivatives is designed and synthesized based on the tebufloquin scaffold. Several compounds exhibit excellent selective inhibition (88.9%) against Magnaporthe oryzae . Structure–activity relationship analysis reveals that electron-withdrawing substituents on the benzoyl moiety favor activity. DFT calculations, ADMET prediction, and molecular docking provide insights into electronic properties and binding modes.
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DOI
PubMed
高影响因子
Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 8
·2347-2353
·
IF 6.367
Longhui Deng,Zhihao Zhang,Yifeng Gao,Qiu Xiong,Zicheng Li,Jianbin Xu,Zilong Zhang,Jun Chen,Peng Gao
Perovskite solar cells (PSCs) have achieved tremendous success in advancing high power conversion efficiencies. However, defect-induced recombination at grain boundaries (GBs) and the surface of polycrystalline perovskites seriously hinder the further performance enhancement and environmental stability of PSCs. Here, a simple passivating molecule, 4-nitrophthalonitrile (4NPN) with σ–π accepting nitro (–NO2) and cyano groups (–CN), was employed to passivate the charged defects in perovskites. The addition of electron-deficient 4NPN into the perovskite layer of PSCs could not only enhance VOC and the FF, leading to high PCE over 22% but also improved environmental stability. These improvements were attributed to the effective passivation of the defects in the perovskite film by the strongly polarized nitro/cyano groups. In addition, the electron-deficient 4NPN could slightly adjust the energy level of the perovskite facilitating more efficient hole transfer. This work demonstrates the role of strong electron-withdrawing nitro/cyano groups in passivating the vacancy-defects of perovskites and 4NPN as a simple passivator conducive to obtaining high-performance PSCs.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2020
·Vol. 49
·期 10
·6208-6213
·
IF 1.774
Chen Ruilan,Cui Guonan,Yang Yanchun,Li Yuemin,Alata H.,Tian Xiao,Tegus O.
Abandoning the traditional deposition of as-prepared Cu 2 ZnSnS 4 (CZTS) thin films in a glove box, a modified thiol-based solution system suitable for deposition in air is described to further reduce device production costs. In this modified approach, metal salts and thiourea are used as the starting materials and are dissolved in a mixed solution of thioglycolic acid and 2-methoxyethanol, forming a homogeneous precursor solution. The as-deposited CZTS thin films are obtained by spin-coating the precursor solution in air, followed by the selenization process to form large-grained Cu 2 ZnSn(S,Se) 4 thin films. Combining the microstructural results with compositional analyses, the optimal selenization conditions for the Cu 2 ZnSn(S,Se) 4 absorber layer were found to be 540°C and 10 min.
研究领域:
材料科学
·
薄膜制备
·
光电材料
·
能源材料
·
半导体工艺
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DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2019
·Vol. 48
·期 11
·7068-7075
·
IF 1.676
Li Shuhui,Zhou Ying,Cui Lijun,Ge Zhenhua,Feng Jing
In 2 O 3 (ZnO) k superlattice ceramics are promising oxide thermoelectric materials, as superlattice interfaces are effective in scattering phonons and filtering low-energy electrons to decrease thermal conductivity and improve the figure of merit ( ZT ) value. In this work, homologous compounds were prepared by solid-state reaction method using ZnO and In 2 O 3 as raw materials. Phase purity and crystal structure were characterized by x-ray diffraction, revealing that In 2 O 3 (ZnO) k crystallizes in an R3 m space group for odd k values and P6 3 /mmc for even k values. The study of thermoelectric (TE) properties showed that as k increased, the thickness of InO(ZnO)
+ 3
also increased, while the electrical conductivity, thermal conductivity, Seebeck coefficient, power factor and ZT value were all decreased. In 2 O 3 (ZnO) 3 samples obtained a maximum power factor of 651 μ W m −1 K −2 at 973 K, and also achieved a maximum ZT value of 0.24 at 973 K.
研究领域:
材料科学
·
凝聚态物理
·
能源转换技术
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DOI
高影响因子
JOURNAL OF ASIA-PACIFIC ENTOMOLOGY
·
2022
·
IF 1.58
Shan-shan Gao,Yong-lei Zhang,Kun-peng Zhang,Xing-yun Wang,Qing-bo Tang,Yuan-chen Zhang
The terpene, terpinen-4-ol (T4ol), exhibits contact toxicity in Tribolium castaneum . However, the molecular mechanisms underlying this toxicity have not been elucidated. This study examined changes in the expression of four classic enzymes after exposure of T. castaneum to T4ol. Acetylcholinesterase and glutathione S-transferase activities were markedly inhibited after exposure to T4ol, while that of the detoxifying enzyme cytochrome oxidase P450 increased markedly. Carboxylesterase activity did not show significant changes. Furthermore, RNA sequencing revealed 260 differentially expressed genes (DEG) between the T4ol-treated and control samples, and qRT-PCR was used to validate the RNA-Seq data. The Gene Ontology analysis classified the DEGs into 36 functional groups, including the immune system processes, response to stimulus, and developmental processes. T4ol altered the response to stimulus and the immune system process of beetles by inducing the expression of the genes Stabilin-1, Attacin 1, and Defensin 1. Furthermore, the DEGs receptor tyrosine kinase Torso-like protein ( RTKTsl ), Frizzled 4 ( Fz4 ), Protein Wnt-5b, Ecdysone-induced protein 78C ( E78 ), Zinc finger protein GLIS1 ( ZFPGLIS1 ) were classified as participating in beetle development, and Fz4 and Protein Wnt-5b also mapped to the Wnt signaling pathway. This indicated that pathways associated with development are inhibited after exposure to T4ol. T4ol also induced CYP9Z6 / GSTs7 overexpression, and RNAi targeting these genes significantly increased larvae mortality on T4ol exposure, supporting the participation of CYP9Z6 / GSTs7 in the response to T4ol in T. castaneum . The results of this study will facilitate understanding of the toxic mechanisms of T4ol and provide a basis for controlling the pests of stored products.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xia Chen,Jihuai Wu,Guodong Li,Yitian Du,Qi Chen,Chunyan Deng,Yuan Xu,Sijia Zhu,Fangfang Cai,Juanmei Liu,Yuelin Wei,Yunfang Huang
The rapid development of perovskite solar cells (PSCs) makes it one of the most competitive photovoltaic devices in the field of new energy. However, the suboptimal performance and poor stability caused by numerous defects are still the main factors limiting the development of PSCs. Herein, a polarized molecule additive of 4-(aminomethyl) benzonitrile hydrochloride (AMBNCl) is introduced into perovskite. Owing to its special polar electron density distribution, −C≡N group, −NH3+ terminal, and Cl– ions, the modification of AMBNCl can improve the quality of perovskite crystal growth, passivate the defects of Pb2+, adjust the energy level array between the perovskite layer and hole-transport layer, and alleviate the carrier nonradiative recombination. As a result, the AMBNCl-modified device achieves a champion efficiency of 23.52%. The unpacked device still maintained 91.2% of its original efficiency after storing in an air environment (RH ∼40%, 25 °C) for 50 days.
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DOI
PubMed
高影响因子
DESALINATION
·
2022
·
IF 11.211
Rui Wu,Yanyan Tan,Fangang Meng,Yuanyuan Zhang,Yu-Xi Huang
Membrane distillation (MD) is promising desalination technology for hypersaline wastewater treatment. However, traditional MD membranes are subject to low vapor flux and mineral scaling. In this study, we report the fabrication of a composite membrane composed of polyvinylidene fluoride (PVDF) and metal azolate framework-4 (MAF-4) via electrospinning. The highly porous MAF-4 provides additional vapor transfer channels and better heat insulation , thereby significantly increasing the membrane flux compared to a bare electrospun PVDF membrane. The surface chemistry of the MAF-4 surface is further tailored with fluorinated functional groups through the coordination between the fluorinated molecule and the surface Zn atom. This surface modification changes the surface wettability of the MAF-4 and thus improves the membrane scaling resistance. This study demonstrates a universal approach for preparing high flux and scaling-resistant MD membranes. In addition, the tunable surface property of MAF-4 can also be utilized to design and fabricate other types of membrane surfaces by coordinating different functional molecules.
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2022
·
IF 5.141
Aijing Wang,Minggang Tian,Yujing Zuo,Zhiming Gou
Silicone-containing polymers have broad application prospects in the detection of many analytes due to their unique fluorescence properties. Environmental pollutants are very complex, which have prompted researchers to explore different detection methods. In this report, two kinds of polymers were synthesized via Heck-reaction between tetramethyltetravinylcyclotetrasiloxane (D 4 vi ) and carbazole derivatives. The polymers showed excellent fluorescent properties and exhibited high sensitivity to 4-nitrophenol (4-NP) and Fe 3+ in solution. Furthermore, the polymers still showed high sensitivity for Fe 3+ in living cells. We estimate that the cyclic structure of D 4 vi and carbazole structure will serve as responsive sites for Fe 3+ and 4-NP, respectively. The frontier molecular orbitals of polymers were calculated by Materials Studio and the effect of the cyclic structure of D 4 vi on their responsiveness had been discussed. The design idea of the polymer sensors can provide a new direction for the synthesis of multi-response polymer fluorescent probes.
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高影响因子
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