Journal of Materials Chemistry A
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2021
·Vol. 9
·期 7
·4138-4149
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IF 12.732
Jiankai Zhang,Huangzhong Yu
The excessive energy loss (Eloss) mainly resulting from the energetic offsets between different layers and defect state-induced charge trapping and recombination limits the further development of perovskite solar cells (PVSCs). In this work, three solution-processed thiophene-based interlayers were firstly introduced to reduce the Eloss in PVSCs by optimizing the surface electronic states of the SnO2 electron transport layer (ETL) and improving the MAPbI3 film quality. The thiophene-based interlayers improve the conductivity and reduce the work function of SnO2 ETLs, resulting in more efficient electron transportation. Downward band-bending occurs at the SnO2/MAPbI3 interface owing to the permanent dipole moment of these interlayers, which enables more efficient charge carrier extraction and lower Eloss for PVSCs. In addition, the sulfur atoms of the thiophene rings with a lone pair of electrons can bond with the under-coordinated Pb2+ of MAPbI3, thus passivating the ion defect states and reducing the defect state-induced charge carrier trapping and recombination at the SnO2/MAPbI3 interface. These interlayers change the hydrophilicity of the SnO2 surface and promote the formation of high quality MAPbI3 films with larger grain size and fewer grain boundaries, improving the stability of PVSCs. Combining these desirable advantages, the optimized MAPbI3-based PVSCs achieve a highest power conversion efficiency (PCE) of 20.61% with a high open-circuit voltage (VOC) of 1.117 V and fill factor (FF) over 80%, which is higher than that of the pristine PVSCs with a highest PCE of 17.54%. The optimized PVSCs without any encapsulation show higher thermal and humidity stability compared with the pristine PVSCs. Therefore, this work demonstrates an effective way to reduce Eloss, as well as improving both the performance and stability of PVSCs by utilizing thiophene-based interlayers to modify the interface of SnO2/MAPbI3.
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高影响因子
ELECTROCHIMICA ACTA
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2020
·
IF 6.215
Di Zhang,Sidong Zhang,Yanyan Fang,Dongmei Xie,Xiaowen Zhou,Yuan Lin
Introducing bifunctional linkers (COOH-R-SH) between TiO 2 electrodes and quantum dots (QDs) was an effective apprIntroducing bifunctional linkers (COOH-R-SH) between TiO 2 electrodes and quantum dots (QDs) was an effective approach in preparation of quantum dot-sensitized solar cells (QDSCs). Three types of linkers (4-mercaptobenzoic acid (MBA, R =phenyl), 3-thiophenecarboxylic acid (TPA, R =thiophene), and thioglycolic acid (TGA, R =alkyl)) were used to functionalize TiO 2 electrodes and prepare TiO 2 /CdSe QDSCs with photoelectric conversion efficiency (PCE) of 5.50%, 4.59% and 4.85%, respectively. Various properties of modified and blank TiO 2 electrodes, such as QDs loading, absorbance, work function, interfacial charge injection, recombination and their influence on PCE were investigated. In spite of low adsorption amounts of MBA on TiO 2 , the phenyl MBA-TiO 2 electrodes obtained the highest Cd content due to regular arrangement and strong affinity to QDs. The FTIR spectra proved strong interactions between MBA and TiO 2 electrodes, leading to fast electron injection from QDs to TiO 2 electrodes. The electron injection rate in MBA-TiO 2 electrodes was the same as blank-TiO 2 , larger than TGA- and TPA-ones. Work function of TiO 2 electrodes modified by linkers could reduce several eV , in which the MBA-one decreased less, corresponding to the highest applied potential difference. The open-circuit voltage-decay measurement demonstrated that the MBA-TiO 2 photoanodes had the least charge recombination. Enhanced light absorption capacity and fast electron injection rate were two key points for modified cell to improve short-circuit current, while low recombination and appropriate energy level positions increased open-circuit voltage. Those make MBA-TiO 2 photoanodes obtain the best efficiency of 5.50%. We expected this work to guide the selection of linkers for design and optimization of photoanodes interface of QDSCs.oach in preparation of quantum dot-sensitized solar cells (QDSCs). Three types of linkers (4-mercaptobenzoic acid (MBA, R =phenyl), 3-thiophenecarboxylic acid (TPA, R =thiophene), and thioglycolic acid (TGA, R =alkyl)) were used to functionalize TiO 2 electrodes and prepare TiO 2 /CdSe QDSCs with photoelectric conversion efficiency (PCE) of 5.50%, 4.59% and 4.85%, respectively. Various properties of modified and blank TiO 2 electrodes, such as QDs loading, absorbance, work function, interfacial charge injection, recombination and their influence on PCE were investigated. In spite of low adsorption amounts of MBA on TiO 2 , the phenyl MBA-TiO 2 electrodes obtained the highest Cd content due to regular arrangement and strong affinity to QDs. The FTIR spectra proved strong interactions between MBA and TiO 2 electrodes, leading to fast electron injection from QDs to TiO 2 electrodes. The electron injection rate in MBA-TiO 2 electrodes was the same as blank-TiO 2 , larger than TGA- and TPA-ones. Work function of TiO 2 electrodes modified by linkers could reduce several eV , in which the MBA-one decreased less, corresponding to the highest applied potential difference. The open-circuit voltage-decay measurement demonstrated that the MBA-TiO 2 photoanodes had the least charge recombination. Enhanced light absorption capacity and fast electron injection rate were two key points for modified cell to improve short-circuit current, while low recombination and appropriate energy level positions increased open-circuit voltage. Those make MBA-TiO 2 photoanodes obtain the best efficiency of 5.50%. We expected this work to guide the selection of linkers for design and optimization of photoanodes interface of QDSCs.
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高影响因子
Analytical Methods
·
2019
·Vol. 11
·期 29
·3727-3735
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IF 2.378
Jing Lu,Ling Wang,Xia Xu,Xiangxiang Qin,Xia Qiu,Zhu Yinggui
In this work, the electrogenerated chemiluminescence (ECL) behavior of a lanthanide Tb(III) complex was studied using thiophene carboxylic acid (3-thiophenecarboxylic acid, 3-TCA) as the ligand and triethanolamine (TEOA) as the co-reactant. The spectral features of the ECL and fluorescence (FL) of the Tb(III) complex were analyzed. The complexes were characterized by FT-IR and elemental analyses. The effects of TEOA concentration, pH, and scan rate on the ECL intensity were studied in detail. Furthermore, a simple ECL platform was reported for the sensitive and selective detection of Cr6+ based on quenching after the addition of Cr6+. A method for the detection of Cr6+ with high sensitivity was established, and the limit of detection was determined as 0.064 nM. It is anticipated that these complexes can be a new class of promising materials for fabricating ECL sensors to detect Cr6+ readily in environmental and practical samples.
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高影响因子
COLLOID AND POLYMER SCIENCE
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2018
·Vol. 296
·期 8
·1365-1372
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IF 1.967
Zhang Rongli,Jin Zhenzhen,Zhang Cuige,Yang Renchun,Sun Mingyue,Wong Ching-Ping
A kind of electroactive nanoparticles (NPs) was prepared in solution by self-assembling amphiphilic 3-thiophenecarboxylic acid-modified starch (TPCA-St), which was synthesized through esterification reaction. By casting TPCA-St NPs on the surface of gold electrode and subsequent electropolymerization of the thiophene moieties in NP film, the electroconductive TPCA-St NP-based film was formed. After horseradish peroxidase and Nafion were sequentially cast on the film surface, a biosensor was successfully prepared. The prepared biosensor showed high sensitivity for H 2 O 2 detection. The linear range from 1 × 10 −10 to 1 × 10 −5 mol L −1 with a detection limit of 3 × 10 −11 mol L −1 was obtained for H 2 O 2 sensing. The biosensor also showed good repeatability and stability, and it has been successfully used to sense H 2 O 2 in commercial disinfector with satisfactory results.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2018
·Vol. 135
·期 46
·46764
·
IF 1.901
R. Zhang,L. Wang,C. Zhang,R. Yang,X. Sun,B. Song,C.-P. Wong,Y. Xu
A novel kind of conductive self-assembled colloid particles (CPs) was prepared from poly(3-thiophenecarboxylic acid) (PTPCA) and chitosan (CS) via electrostatic interaction and π–π interaction. The resultant CPs were then cast on the electrode surface to provide a platform for fabricating high-sensitive biosensor. It should be noted that the good conductivity of PTPCA can accelerate the electron transfer and facilitate the signal transduction from the CP film to the underlying electrode. This advantage endowed the biosensor with high sensitivity for H 2 O 2 detection. Under the optimal conditions, a linear range from 1 × 10 −11 to 1 × 10 −5 mol L −1 with a detection limit of 3 × 10 −12 mol L −1 was obtained for H 2 O 2 detection. The biosensor can be used to detect H 2 O 2 in commercial disinfector with satisfactory results. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46764.
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高影响因子
THERMOCHIMICA ACTA
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2014
·
IF 2.105
Xiang Liu,Mengmeng Liang,Yonghong Hu,Wenge Yang,Ying Shi,Jingjing Yin,Yan Liu
In this study, the solubility of 3-thiophenecarboxylic acid was measured in (water + acetic acid) binary solvent mixtures in the temperature ranging from 283.15 to 338.15 K by the analytical stirred-flask method under atmospheric pressure. The experimental data were well-correlated with the modified Apelblat equation and the λh equation. In addition, the calculated solubilities showed good agreement with the experimental results. It was found that the modified Apelblat equation could obtain the better correlation results than the λh equation. The experiment results indicated that the solubility of 3-thiophenecarboxylic acid in the binary solvents increased with increasing temperature, increases with increasing water contents, but the increments with temperature differed from different water contents. In addition, the thermodynamic properties of the solution process, including the Gibbs energy , enthalpy, and entropy were calculated by the van’t Hoff analysis. The experimental data and model parameters would be useful for optimizing the process of purification of 3-thiophenecarboxylic acid in industry.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wendi Wang,Jianxin Wang,Danfeng He,Xin Huang,Yutong Yang,Xi Chen,Lijie Zhao,Hong Pan,Jun Zhang
Layered double hydroxides (LDHs) are promising electrode materials for supercapacitors, owing to their high theoretical capacitance and excellent redox activity arising from their unique layered structure and the synergistic effects of bimetallic elements. Among them, NiV-LDHs stand out as a promising candidate for high-performance capacitors, since the + 2/+ 3 valence states of nickel and the multi-valence states of vanadium (+3/+4/+5) synergistically facilitate rapid and reversible pseudocapacitive reactions, significantly enhancing specific capacitance. However, the high-coordination structure of V 5 + tends to collapse during charge-discharge cycles, leading to reduced cycling stability. To address these issues, this study proposes a dynamic electronic balancing strategy to regulate electron transfer from Ni to V, thereby suppressing the formation of unstable high-coordination V 5+ and improving the structural stability of NiV-LDH. Through the electrochemical polymerization and intercalation of thiophene-3-carboxylic acid (3TCA) into the LDH layers, the resulting poly(thiophene-3-carboxylic acid) (P3TCA) acts as a conductive bridge to dynamically adjust the electron distribution between Ni and V. This redistribution enhances the activity of Ni while stabilizing the structure of V. The optimized NiV-LDH/NF/P3TCA electrode demonstrates exceptional cycling stability and charge transfer kinetics. Remarkably, it achieves an ultra-high specific capacitance of 2040 F g −1 at 1 A g −1 and maintains 78.72 % of its initial capacity after 5000 cycles, underscoring its potential for high-performance supercapacitor applications.
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高影响因子
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