JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xinhong Zhao,Kai Li,Yongchu Fang,Yu Tao,Xiaoxian Song,Haiting Zhang,Huaqing Yu,Zaoxue Yan
Flexible photodetectors based on vertically stacked PEDOT:PSS/PbS/CsPbCl 3 were prepared by a simple low temperature spin-coating method. Due to the synergistic effect, the flexible PEDOT:PSS/PbS/CsPbCl 3 photodetectors exhibited a high responsivity of 6.67 A/W and detectivity of 5.78 × 10 10 Jones under a relatively low external bias. The photocurrent of a series of continuous-bending shown that the flexible PEDOT:PSS/PbS/CsPbCl 3 photodetectors had excellet photocurrent stability and reproducibility. The results indicate that the vertically stacked PEDOT:PSS/PbS/CsPbCl 3 architecture has great potential in wearable and portable low-voltage optoelectronic devices.
研究领域:
材料科学
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2017
·Vol. 7
·期 8
·201
·
IF 3.553
Rongfang Wu,Yuehua Yang,Miaozi Li,Donghuan Qin,Yangdong Zhang,Lintao Hou
PbS colloidal quantum dots (CQDs) solar cells have already demonstrated very impressive advances in recent years due to the development of many different techniques to tailor the interface morphology and compactness in PbS CQDs thin film. Here, n-hexane, n-octane, n-heptane, isooctane and toluene or their hybrids are for the first time introduced as solvent for comparison of the dispersion of PbS CQDs. PbS CQDs solar cells with the configuration of PbS/TiO2heterojunction are then fabricated by using different CQDs solution under ambient conditions. The performances of the PbS CQDs solar cells are found to be tuned by changing solvent and its content in the PbS CQDs solution. The best device could show a power conversion efficiency (PCE) of 7.64% under AM 1.5 G illumination at 100 mW cm−2in a n-octane/isooctane (95%/5%v/v) hybrid solvent scheme, which shows a ~15% improvement compared to the control devices. These results offer important insight into the solvent engineering of high-performance PbS CQDs solar cells.Keywords:colloidal quantum dots;solar cells;PbS;solvent engineering
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 10
·4643
·
IF 4.9
Tingqiang Yan,Kang Chen,Xiaodong Wang,Yingjie Qiao
Polylactic acid (PLA) exhibits remarkable biocompatibility and biodegradability, rendering it a highly promising material for applications in packaging and disposable products. However, its inherent brittleness, low melt strength, and slow crystallization rate significantly restrict its practical uses. Our previous studies have shown that incorporating the ADR chain extender can yield chitosan–polylactic acid–ADR (CS/PLA-ADR) composites with outstanding antibacterial properties, enhanced biodegradability, and the capability to effectively block water vapor and oxygen. However, the low elongation at break (less than 10%) limits its application in scenarios that require high ductility. To enhance the toughness of the CS/PLA-ADR composites, the flexible biodegradable polybutylene succinate (PBS) is innovatively introduced. The mechanical properties of PBS can be compared with polyethylene and polypropylene, providing high strength and toughness. The mechanism of introducing PBS is to construct a good, toughened structure through the flexible structure of PBS in collaboration with ADR toughening agent, achieving a balance between strength and toughness in CS/PLA-ADR-PBS composites. The incorporation of PBS is anticipated to improve the ductility of CS/PLA-ADR composites. This study systematically investigates the effects of varying PBS content (0–30%) on the properties of CS/PLA-ADR-PBS composites, aiming to determine the optimal PBS content and elucidate the mechanism by which PBS enhances the overall performance of the composites. The results indicate that when the PBS content is 20%, the composites exhibit optimal overall properties. This research provides a theoretical foundation and technical support for the development of environmentally friendly and sustainable packaging materials, offering significant research value and broad application prospects.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 29
·10033-10042
·
IF 6.4
Jungang He,Xianchang Zhou,Ya Wang,Mohan Yuan,Hang Xia,Xiao Chen,You Ge,Xia Wang,Liang Gao,Jiang Tang
Lead sulfide (PbS) colloidal quantum dots (CQDs) are promising candidates for infrared photodetectors (PDs). However, solution-processed PbS CQDs with spectra ranging up to the mid-infrared range are completely absent because long-chain organic ligands capped on large size CQDs provide insufficient steric hindrance to separate the adjacent particles for dispersion in solvents, limiting their application in infrared PDs. Herein we report a strategy that addresses the extension of the response spectra of PbS CQDs by incorporating PbNO2 impurities. This is achieved by photo-carrier transition from the valence band (VB) of PbS CQDs to the unoccupied in-gap states (IGSs) near the conduction band. The device exhibits an obvious response with responsivity of 0.11 A W−1 and a detectivity of 5.38 × 108 Jones under the illumination of 3000 nm light rays at room temperature. Once the temperature decreased to 78 K, the device exhibited a response with a responsivity of 0.03 A W−1 and a detectivity of 3.77 × 108 Jones. The X-ray photoelectron spectroscopy results indicate that these IGSs are formed by using potassium nitrite (KNO2) to remove the oleate ligands and induce oxidation impurities on the CQD surface. Additionally, detailed characterization is carried out to investigate the mechanism of the infrared response of PbS CQDs. We are optimistic that this strategy could provide an alternative avenue toward the use of CQDs in optoelectronic devices with a broad response range.
研究领域:
材料科学
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Zhixiang Hu,Licheng Zhou,Long Li,Jingyao Liu,Hua-Yao Li,Boxiang Song,Jianbing Zhang,Jiang Tang,Huan Liu
Colloidal quantum dots (CQDs) are promising materials candidates for next-generation semiconductor gas sensors, due to their high surface activity and solution-processability. Despite the improved sensitivity demonstrated by PbS CQDs, their long-term stability remains a challenge for practical applications. In this paper, we propose a stabilization strategy for PbS CQD gas sensors by using atomic-ligand engineering. The oleic acid ligands surrounding PbS CQDs are replaced by halide ligands (Cl – , Br – and I – , respectively) via a phase-transfer ligand exchange method. The sensitivity and long-term stability of the PbS CQD gas sensor towards nitrogen dioxide (NO 2 ) at room temperature are impressively improved. The excellent humidity stability of the iodine ligand exchanged PbS CQD gas sensor is also demonstrated. The mechanism is investigated by real-time electrical measurement, combined with operando diffuse reflection Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analysis. The results indicate that the large atomic radius and high binding energy of iodide ligands enhance surface passivation and provide favorable conditions for NO 2 adsorption and charge transfer. This study highlights the importance of surface ligand engineering in the development of practical CQD gas sensors.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Gomaa Mohamed Gomaa Khalaf,Xinzhao Zhao,Mingyu Li,Chunxia Li,Salman Ali,Tianjun Ma,Hsien-Yi Hsu,Jianbin Zhang,Haisheng Song
Lead sulfide quantum dots (PbS QDs) hold unique characteristics, including bandgap tunability, solution-processability etc., which make them highly applicable in tandem solar cells (TSCs). In all QD TSCs, its efficiency lags much behind to their single junction counterparts due to the deficient interconnection layer (ICL) and defective subcells. To improve TSCs performance, we developed three kinds of ICL structures based on 1.34 and 0.96 eV PbS QDs subcells. The control, 1,2-ethanedithiol capped PbS QDs (PbS-EDT)/Au/tin dioxide (SnO 2 )/zinc oxide (ZnO), utilized SnO 2 layer to obtain high surface compactness. However, its energy level mismatch causes incomplete recombination. Bypassing it, the second ICL (PbS-EDT/Au/ZnO) removed SnO 2 and boosted the power conversion efficiency (PCE) from 5.75% to 8.69%. In the third ICL (PbS-EDT/poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA)/Au/ZnO), a thin layer of PTAA can effectively fill fissures on the surface of PbS-EDT and also protect the front cells from solvent penetration. This TSC obtained a PCE of 9.49% with an open circuit voltage of 0.91 V, a short circuit current density of 15.47 mA/cm 2 , and a fill factor of 67.7%. To the best of our knowledge, this was the highest PCE achieved by all PbS QD TSCs reported to date. These TSCs maintained stable performance for a long working time under ambient conditions.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2017
·Vol. 19
·期 6
·946-951
·
IF 3.474
Zhen Huang,Guangmei Zhai,Zhiming Zhang,Changwang Zhang,Yong Xia,Linyuan Lian,Xiaoming Fu,Daoli Zhang,Jianbing Zhang
A low cost and large scale synthetic approach was developed for colloidal PbS quantum dots (QDs). The heat up strategy was adapted for large scale production, thioacetamide in oleylamine (OLA) was used as the sulphur precursor for low cost and safe synthesis, and PbCl2 in OLA was used as the lead precursor for a well passivated surface. Due to the balance between the diffusion coefficient and monomer oversaturation generated by the dissolution of small particles, an optimum growth temperature exists in the new synthesis. The synthesis was easily scaled up to produce 18 g of PbS QDs from one reaction batch, with a high chemical yield of ∼80% and the as synthesized QDs exhibit a high photoluminescence quantum yield of >40% and excellent air-stability of at least 60 days, due to the Cl− and oleate co-passivation.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2012
·
IF 4.186
Yu Wang,Aiwei Tang,Kai Li,Chunhe Yang,Miao Wang,Haihang Ye,Yanbing Hou,Feng Teng
A one-step colloidal process was adopted to prepare face-centered-cubic PbS nanocrystals with different shapes such as octahedral, starlike, cubic, truncated octahedral, and truncated cubic. The features of this approach avoid the presynthesis of any organometallic precursor and the injection of a toxic phosphine agent. A layered intermediate compound (lead thiolate) forms in the initial stage of the reaction, which effectively acts as the precursor to decompose into the PbS nanocrystals. The size and shape of the PbS nanocrystals can be easily controlled by varying the reaction time, the reactant concentrations, the reaction temperatures, and the amount of surfactants. In particular, additional surfactants other than dodecanethiol, such as oleylamine, oleic acid, and octadecene, play an important role in the shape control of the products. The possible formation mechanism for the PbS nanocrystals with various shapes is presented on the basis of the different growth directions of the nanocrystals with the assistance of the different surfactants. This method provides a facile, low-cost, highly reproducible process for the synthesis of PbS nanocrystals that may have potential applications in the fabrication of photovoltaic devices and photodetectors.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Huaxiao Xie,Pan Deng,Zhentao Zhou,Heng Xiong,Xiumin Chen,Bin Yang,Baoqiang Xu
Lead sulfide and antimony trisulfide are obtained through the vacuum thermal decomposition of Jamesonite. However, in this process, the microscopic mechanism and stability, which affects their deep separation, is unclear. This mechanism was explored under vacuum conditions using thermodynamics and molecular dynamics calculations along with experimental research. At 5 Pa, PbS decomposes and volatilizes at 1173 K and Sb 2 S 3 volatilizes at 923 K. The dynamic simulation results show that PbS are more likely to decompose and generate Pb and S 2 than Sb 2 S 3 . The fracture mode of the bond in the thermal decomposition process of PbS is layer-by-layer expansion between layers. The binding ability of Sb atoms and S atoms is also relatively strong, and the binding volatilizes outward in the form of Sb 2 S 3 . In addition, according to the vacuum distillation experiment, 5 Pa and 923-973 K are considered to be the best separation conditions for separating PbS and Sb 2 S 3 . Under this condition, Sb 2 S 3 is completely volatilized, while PbS is neither volatilized nor decomposed, and the separation rate reaches the maximum. Therefore, this study clarified the decomposition and volatilization mechanism of PbS and Sb 2 S 3 at the theoretical level, and provided guidance for sulfide separation experiments.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Science
·
2020
·Vol. 13
·期 2
·579-591
·
IF 30.289
Binbin Jiang,Xixi Liu,Qi Wang,Juan Cui,Baohai Jia,Yuke Zhu,Jianghe Feng,Yang Qiu,Meng Gu,Zhenhua Ge,Jiaqing He
The application of thermoelectric technology is hindered by low efficiencies and high costs, demonstrating a strong demand for high-performance thermoelectric materials composed of low-cost and earth-abundant elements. PbS-based materials have attracted much attention for thermoelectric power generation due to their low-cost and earth-abundant features. However, the high lattice thermal conductivities and low electron mobilities of these materials limit their thermoelectric performance. Here, we show that we can largely reduce the lattice thermal conductivity of an n-type PbS-based material to 0.4 W m−1 K−1 through introducing zigzag nanoprecipitates with a uniform width of around 1 nm. The electron mobility was also successfully improved by reducing the effective mass through Se alloying. Finally, an extraordinary figure of merit of 1.7 at 900 K was realized in an n-type Pb0.93Sb0.05S0.5Se0.5 sample. A thermoelectric power generation module was fabricated with this n-type PbS material and our home-made high-performance p-type PbTe. It demonstrated a high conversion efficiency of 8.0% at a temperature difference of 565 K. Furthermore, a segmented module consisting of n-/p-Bi2Te3 and n-PbS/p-PbTe was fabricated, which exhibited a high conversion efficiency of 11.2% at a temperature difference of 585 K. This efficiency is the same as those of reported PbTe-based modules, and it was realized at a much lower cost. As a result, low-cost high-performance n-type PbS-based materials as a promising PbTe alternative will promote the extensive commercial application of thermoelectric power generation.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 3
·2243-2247
·
IF 3.201
Yuming Dong,Shibin Xia,Pingping Jiang,Guangli Wang,Shuang Zhao
Photocathodes sensitized by photoactive semiconductors are of great significance for photoelectrochemical hydrogen evolution and tandem solar cells, yet their development is hindered by the scarcity of appropriate materials to serve as a hole-selective layer. In this work, we report a novel photocathode employing PbS as the photoactive material and tin-doped indium oxide (ITO) as the hole-selective layer. The optimized electrode showed a photocurrent of −75 μA cm−2 under light illumination at −0.222 V vs. Ag/AgCl with operational activity for 9 hours. The key factors for hole transfer were investigated. These results showed ITO to be a promising hole-transfer material for photoelectrochemical photocathodes.
研究领域:
材料科学
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Xudong Wu,Ruijie Xu,Xianli Li,Ruosheng Zeng,Binbin Luo
As a potential candidate for photocatalytic CO2 reduction, CsPbX3 perovskite nanocrystals (PNCs) have attracted enormous attention due to their suitable energy band structure and large molar extinction coefficient for visible light. However, the catalytic performance on CO2 reduction is greatly limited due to the intrinsically fast radiative recombination and poor stability of PNCs. In this work, PbS nanoparticles are uniformly anchored on CsPbBr3 PNCs with the assistance of a bridged amino acid due to the directed interaction between −COO– (−NH3+) and Pb2+ (Br–). Because of the small lattice mismatch between PbS and CsPbBr3, the introduction of PbS significantly quenches the emission of CsPbBr3 and boosts the interfacial charge transfer, thereby resulting in an enhanced photoelectrocatalytic CO2 reduction rate of ∼2.94 and 0.36 μmol cm–2 h–1 for CO and CH4 products, which are ∼2.4 times higher than that of pristine CsPbBr3 PNCs, respectively. This work provides a universal strategy of constructing homogeneous nanocomposites for catalytic applications.
研究领域:
材料科学
·
光催化化学
·
能源转换
✓ 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）