Journal of Materials Chemistry C
·
2025
·Vol. 13
·期 17
·8485-8493
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IF 5.1
Tian Jia,Lin Pan,Yuanze Hong,Xiaowei Gu,Xuechao Yu
Short-wavelength infrared photodetectors with a wavelength range of 1–3 μm have attracted increasing attention in various fields, such as imaging and optical communications. As an alternative approach to high-performance infrared photodetectors, hybrid structures that combine graphene and lead sulfide quantum dots (PbS QDs) have been extensively investigated. However, conventional organic ligand-coated PbS QDs face challenges such as volatility and susceptibility to oxidation. Here, we report a methodology for switching the repulsive forces in various surface ligands. This methodology involved forming tight ionic pairs with cationic surfactants to change the colloidal stabilization process of metal chalcogenide complex (MCC)-capped PbS QDs from long-range electrostatic to short-range steric. The noncovalent surface modification remarkably improved the charge transfer efficiency at the graphene/PbS QDs interface upon using MCCs as a linker. The hybrid graphene/PbS QD photodetectors with MCC ligands exhibited superior detectivity up to 3 orders of magnitude higher than those with organic ligands due to the strong electron coupling between SLG and PbS QDs. Moreover, the carrier relaxation time of (NH4)3AsS3-decorated QDs was dominated by efficient carrier transfer to the ligand states on timescales as fast as 1.03 ns. This work demonstrates that ligand engineering can significantly enhance the charge transfer process, which further boosts the responsivity and detectivity performances of the photoelectronic devices.
研究领域:
材料科学
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光电子学
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DOI
高影响因子
ACS Applied Electronic Materials
·
2025
·
IF 4.7
Fan Fang,Yihong Tang,Haodong Tang,Yihan Song,Qian Chen,Lei Rao,Shuang Xiao,Wei Chen,Leifeng Cao
Colloidal lead sulfide (PbS) quantum dots (QDs) have emerged as promising materials for short-wave infrared (SWIR) photodetectors (PDs) due to their size-tunable absorption, low-temperature processability, and compatibility with large-area fabrication. However, surface trap states in the electron transport layer (ETL), commonly zinc oxide (ZnO), often lead to increased charge recombination and dark current, limiting device performance. Here, we report a surface modification strategy using (3-aminopropyl)triethoxysilane (APTES) to functionalize ZnO ETLs in PbS QD PDs. This treatment reduces the surface roughness from 8.90 to 6.69 nm and passivates interfacial defects via silane bonding. As a result, the devices exhibit suppressed dark current (from 2155 to 855 nA/cm2), enhanced specific detectivity (from 1.39 × 1010 to 8.08 × 1010 Jones), and improved response speed and optimized signal stability. Furthermore, the PD retains over 85% of its photocurrent under SWIR illumination in simulated smoke conditions, whereas the visible light response drops by more than 50%, demonstrating excellent potential for real-time smoke detection. These findings underscore the effectiveness of ETL interface engineering in advancing high-performance, low-cost SWIR PDs for imaging and environmental sensing applications.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Yikai Wang,Sen Li,Ruofeng Liu,Jianbing Zhang,Jing Liu,Jiajun Luo,Jiang Tang
Room-temperature uncooled infrared photodetectors based on lead sulfide (PbS) offer significant potential for applications in the military, environmental, and automotive fields. While chemical bath deposition (CBD) offers cost and scalability advantages, inevitable oxygen doping and mandatory high-temperature sensitization impose fundamental limitations on device performance and integration. To address these challenges, this study reports an in situ antimony (Sb) doping strategy that enables the one-step growth of high-quality PbS films at room temperature. The introduced Sb dopant acts as a “sacrificial anode” to passivate the surface and suppress oxygen incorporation, which refers to the metallic Sb preferentially reacting with dissolved oxygen species, thereby “sacrificing” itself to protect the Pb2+ and S2– ions from oxidation and preventing oxygen inclusion in the PbS lattice, thereby drastically reducing dark current. Meanwhile, it generates n-type PbS domains, spontaneously forming built-in microscale PN junctions with the p-type matrix to facilitate efficient charge separation. Consequently, the optimized Sb-doped PbS photodetector exhibits a superior performance with a low dark current of 0.21 mA at 1 V, a fast average response time of 39.25 μs, and a high specific detectivity of 5.36 × 1010 Jones at 2.6 μm, which is comparable to mainstream commercial uncooled devices. This in situ doping approach not only delivers a superior PbS photodetector but also pioneers a general pathway for engineering complex optoelectronic structures in solution-processed semiconductors.
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DOI
PubMed
高影响因子
Frontiers of Optoelectronics
·
2023
·Vol. 16
·期 1
·1-11
·
IF 5.4
Zhu Mengqiong,Zhang Yuanbo,Lu Shuaicheng,Wang Zijun,Zhou Junbing,Ma Wenkai,Zhu Ruinan,Chen Guanyuan,Zhang Jianbing,Gao Liang,Yu Jiancan,Gao Pingqi,Tang Jiang
Infrared photovoltaic cells (IRPCs) have attracted considerable attention for potential applications in wireless optical power transfer (WOPT) systems. As an efficient fiber-integrated WOPT system typically uses a 1550 nm laser beam, it is essential to tune the peak conversion efficiency of IRPCs to this wavelength. However, IRPCs based on lead sulfide (PbS) colloidal quantum dots (CQDs) with an excitonic peak of 1550 nm exhibit low short circuit current ( J sc ) due to insufficient absorption under monochromatic light illumination. Here, we propose comprehensive optical engineering to optimize the device structure of IRPCs based on PbS CQDs, for 1550 nm WOPT systems. The absorption by the device is enhanced by improving the transmittance of tin-doped indium oxide (ITO) in the infrared region and by utilizing the optical resonance effect in the device. Therefore, the optimized device exhibited a high short circuit current density of 37.65 mA/cm 2 under 1 sun (AM 1.5G) solar illumination and 11.91 mA/cm 2 under 1550 nm illumination 17.3 mW/cm 2 . Furthermore, the champion device achieved a record high power conversion efficiency (PCE) of 7.17% under 1 sun illumination and 10.29% under 1550 nm illumination. The PbS CQDs IRPCs under 1550 nm illumination can even light up a liquid crystal display (LCD), demonstrating application prospects in the future. Graphical
研究领域:
光学工程
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光伏材料
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纳米技术
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能源转换系统
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2020
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IF 4.389
Yueru Li,Min Zhang,Yunxuan Weng,Lei Wang,Jie Song
Herein, nanocomposite microencapsulated abamectin (A-G-G) have been prepared by composite coacervation method with gelatin and gum arabic as the wall materials and abamectin (A–W) as core material. The formation mechanism of A-G-G was determined by fourier-transform infrared spectroscopy, scanning electron microscopy, and other characterization methods. Then, polybutylene succinate (PBS)/A-G-G composite films with different contents of A-G-G microcapsules were prepared. The effects of adding A-G-G microcapsules on the mechanical and sustained-release properties of the composite films were studied. Results show that there is a strong interaction between the C O groups in PBS and free OH of the A-G-G microcapsules. With an increase in the A-G-G microcapsule content, the elongation at the break of composite films increases significantly. When the A-G-G content is 15 %, the elongation at break of the composite films reaches 178.6 ± 6.26 %. The maximum water absorption is 329 ± 5.84 %. Overall, the PBS/A-G-G composite films exhibit good slow-release performance.
研究领域:
材料科学
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农药学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2015
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IF 2.729
Yongping Luo,Chuan Dong,Xiaogang Li,Yang Tian
A selective and sensitive photoelectrochemical sensor for lead ion (Pb 2+ ), which is based on the generated photocurrents of lead sulfide (PbS) nanoparticles under visible light irradiation , has been developed with theoretical and technical simplicity. The PbS nanoparticles are in-situ electrodeposited onto TiO 2 nanotube arrays with the gradual addition of Pb 2+ . The present sensor shows high selectivity against other metal ions , broad linear range from 10 −8 M to 10 −5 M, and low detection limit of 0.39 nM (∼0.08 ppb), which is much lower than the standard of Pb 2+ in drinking water formulated by World Health Organization (WHO). Thus, the strategy has been applied to successful detection of Pb 2+ in tap and lake water samples. The results for determination of Pb 2+ in lake water samples obtained by the present method and atomic adsorption spectroscopy (AAS) are consistent. However, the detection of Pb 2+ in tap water samples has just been realized by the present method, but AAS cannot, because of its low detection limit.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2018
·Vol. 135
·期 18
·46210
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IF 1.901
Xiaopeng Yue,Jian Li,Pengjie Liu,Yicun Lin,Xin Du
Esterified starch was used as an interfacial modifier to treat the surface of cassava dregs. The treated fiber was used to prepare flame-retardant poly(butylene succinate) (PBS)/cassava dregs fiber composites with the incorporation of intumescent flame retardants (IFR). The mechanical performance and flame-retardant properties of composites were investigated. Experimental data showed that an appropriate cassava fiber loading favored the mechanical performance of composites. When the total filler content was 30 wt % [ m (cassava dregs): m (IFR) = 1:5], in comparison with those of composite prepared by 30 wt % IFR, the tensile and impact strengths of composite increased by 40 ± 7 and 62 ± 8%, respectively. Besides, the limited oxygen index value of 37.3% and UL-94 V0 rate of composite could be achieved. Possible flame retardant mechanism was proposed. The combusted residue of incorporated cassava dregs could play a support effect in the three-dimensional charred layer formed by the combustion products of IFR and PBS. The three-dimensional intumescent charred layer, and the formation of incombustible gas, such as NH3, play an important role in insulation, oxygen barrier, thereby effectively improving the flame retardancy and thermal stability of composites. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46210.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
CELLULAR POLYMERS
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2021
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IF 2.053
Xiao-Ming Zhou,Yi-Fan Liu
In order to improve the melt strength of Poly(butylene succinate) (PBS) resin, the silane graft-crosslinked PBS copolyester materials were prepared by melt blending method with vinyltriethyl silane as graft material and benzyl peroxide (BPO) as initiator. At the same time, the environmentally friendly compound foaming agent (citric acid and sodium bicarbonate) was used as foaming agent. The results showed that the tensile properties and melt strength of PBS resin were greatly improved after silane grafting and cross-linking, and the graft and cross-linking reaction between PBS resin and silane occurred, forming a three-dimensional space network structure, and the viscosity and elasticity of polymer melt was changed, which increased the entropy elasticity of the material and strengthened the polymer melt strength. The additional amount of compound foaming agent and the cross-linking degree of material had important influence on the diameter and distribution of PBS foaming material.
研究领域:
材料科学
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环境科学
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高分子化学
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产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2023
·
IF 3.2
Zhao Tao,Yu Jinshuo,zhang Xingyang,Han Wenshuang,zhang Shuo,Pan Hongwei,Zhang Qingxin,Yu Xiaoyan,Bian Junjia,Zhang Huiliang
A environment-friendly polymer blends were prepared by the basis of bio-sourced polylactide (PLA) and aliphatic poly(butylene succinate) (PBS) via melt compounding process. 1,4-butanediol and succinic acid was used together with tetrabutyltitanate as catalyst to synthesize PBS via esterified and polycondensation. The chemical structure of PBS was studied by 1 H NMR and FT-IR spectroscopy. The effects PBS content on thermal behavior, mechanical properties, phase morphology, and thermal stability of PLA/PBS blends were systematically investigated. DSC and DMA results showed that glass transition temperature ( T g ) and cool crystallizaiton temperature ( T cc ) of PLA was influenced by PBS. The different phase morphologies of the PLA/PBS blends formed after addition of PBS into PLA. The various phase morphologies from that blend influenced the rheological behavior and further influenced the mechanical properties in PLA/PBS blends, the well dispersed PBS increased the elongation at break of 8.1 ± 0.1 kJ/m 2 with around 80.0% over than neat the PLA. Finally, the PLA/PBS blends have excellent mechanical and thermal properties by analyzing the toughening mechanism and crystallization morphology. Graphical Abstract
研究领域:
材料科学
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环境科学
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DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Hongji Wang,Jian Wang,Hanyu Yao,Xiaoqing Hao,Yin Lv,Zhong Wei
The environmental pollution caused by traditional plastics and the shortage of petroleum resources have increasingly garnered attention. The non-renewable nature of traditional petroleum-based materials has prompted an increasing number of researchers to focus on developing biodegradable bio-based materials. Polybutylene succinate (PBS) has garnered significant attention due to its excellent properties and low price. However, the poor toughness of PBS limits its applications. In this paper, an environmentally friendly rigid cyclic structure, hydrogenated bisphenol A (HBPA), is introduced into the synthesis of poly(butylene succinate) (PBS), forming the PBHBPAS copolymer. The addition of HBPA reduces the crystallinity of PBS, thereby increasing the elongation at break and improving toughness. It also significantly enhances the glass transition temperature (T g ), mechanical properties, and optical transparency of the copolymer, greatly expanding the application fields of PBS. Due to HBPA's relatively regular and long-chain rigid structure, the synthesized copolymer can significantly increase its elongation at break without reducing tensile strength. Specifically, the synthesized PBHBPAS5 exhibits a tensile strength of 43 MPa and an elongation at break of 557 %. Its toughness and tensile strength are both improved compared to PBS, significantly enhancing its mechanical properties. In addition, the optical transparency test results indicate that the optical transparency of PBHBPAS20 is approximately 16 times that of PBS. The water degradation test reveals that copolyesters with varying proportions of HBPA exhibit polyesters with different degradation rates, which are slower than that of PBS, thereby broadening the application fields of PBS in transparent packaging and degradable mulching films.
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高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Qian Chen,Haibo Zhu,Fan Fang,Haodong Tang,Yihan Song,Youming Chen,Lei Rao,Andong Zhong,Yihong Tang,Yi Li,Peizhao Liu,Jiaji Cheng,Junjie Hao,Yiwen Li,Wei Chen
PbS quantum dots (QDs) are promising materials for short-wave infrared (SWIR) photodetectors due to their tunable bandgap and broad spectral absorption. This study explores the impact of trioctylphosphine (TOP)-mediated surface reconstruction on PbS QDs, revealing that the TOP treatment enhances QD surface morphology, reduces trap states, and improves QD stacking behavior in solid films. Notably, a diode-type photodetector based on TOP-treated QDs exhibits a significantly enhanced specific detectivity ( D *) of 2.07 × 10 11 Jones at 1290 nm, which is 50 times higher than that of devices using conventional QDs. It also shows a marked reduction in dark current density to 237 nA cm −2 at −0.5 V. Furthermore, the TOP-QD photodetector demonstrates improved storage stability under non-encapsulated conditions, underscoring the effectiveness of TOP-mediated surface reconstruction in enhancing both performance and reliability. This work offers valuable insights into the surface engineering of PbS QDs and presents a pathway for the development of high-performance, solution-processed SWIR imaging systems and environmental monitoring technologies.
研究领域:
材料科学
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纳米技术
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光电子学
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半导体物理
·
红外技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry Letters
·
2023
·
IF 5.7
Fei Li,Jiao Jiao Liu,Qiulei Xu,Ruiguang Chang,Lei Wang,Zhenghui Wu,Huaibin Shen,Zuliang Du
PbS quantum dot light-emitting diodes (QLEDs) emitting around 1550 nm promise important applications in optical communications. However, due to insufficient suppression of surface traps for large-size PbS quantum dots (QDs), their performance under large driving current density was not satisfactory. In this work, octanethiol surfactant was added into a PbS QD solution and adsorbed onto the dot surface. As a result, the surface traps and the continuous oxidation of the unprotected (100) facets in PbS QDs were greatly suppressed. Therefore, the PbS QDs with octanethiol doubled their photoluminescence efficiency and showed outstanding stability. The PbS-based QLEDs with benchmark device structure showed a breakthrough high radiance of 18.3 W sr–1 m–2 with >2000 mA/cm2 driving current density. The efficient passivation of surface traps with octanethiol surfactant and the suppressed coupling between excitons and surface states under large working current were the main reasons for achieving the breakthrough high radiance.
研究领域:
纳米技术
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光电子学
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材料科学
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半导体器件
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量子点
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DOI
高影响因子
危险品化学品经营许可证（带存储）