ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yuhui Zeng,Yuanbo Zhang,Meng Peng,Junyang Yin,Weijie Liu,Jianqiao Zhao,Shizhou Tan,Junfeng Liu,Maohua Chen,Zhenyu Chen,Feng Wu,Changqing Chen,Liang Gao,Jiangnan Dai
Cellulose is attracting considerable attention in the field of flexible electronics due to its unique properties and environmental sustainability, particularly as a substrate for flexible devices. Flexible photodetectors are an integral part of cellulose-based devices and have become essential in optical communication, heart rate monitoring, and imaging systems. The performance and adaptability of these photodetectors depend significantly on the quality of the flexible substrates. However, poor bonding with conductive materials results in poor conductivity stability, and limited thermal stability makes cellulose unsuitable for many preparation processes. This study designed polyvinylpyrrolidone (PVP)-coated silver nanowires (AgNWs) as conductive materials, integrating them with cellulose nanofibers (CNFs). The resulting AgNW/CNF composite paper demonstrated high tensile strength (183.9 MPa), low sheet resistance (2.38 Ohm sq–1), and excellent bending durability. Spin-coated PbS colloidal quantum dots (CQDs) films and low-temperature magnetron-sputtered ZnO films were used as functional layers to create a flexible self-powered photodetector. This device features low dark current density (2.35 × 10–9 mA cm–2 @0 V), fast photoresponse (40/24 ms), and stability under bending (up to 180°, 1 mm radius). It shows potential for applications in infrared optical communication and real-time heart rate monitoring, demonstrating the promise of cellulose substrate photodetectors for flexible electronics.
研究领域:
材料科学
·
光电器件
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产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Zeren He,Yan Yang,Jiaxin Liu,Junyu Li,Xingyu Lu,Jikuang Zou,Shuai Yang,Yousheng Zou
Nowadays, halide perovskites have drawn extensive attention as active layers in the field of photodetectors (PDs) attributed to their optoelectric properties. However, the numerous defects in the prepared films and the lack of response in the near-infrared (NIR) range due to the intrinsic band gap limitation severely restrict the performances and applications of perovskite photodetectors. With this in mind, we introduced diethyl ether as a counter-solvent to improve the quality of the peroxide films. After comparison with chlorobenzene (CB), toluene (ToL), and ethyl acetate (EA), the mechanism by which diethyl ether (DE) as an antisolvent improves the quality of the films was explored. MAPbI3 films and lead sulfide (PbS) quantum dots (QDs) were then combined to achieve a visible (VIS)–near-infrared response. The resultant PD, with the structure of ITO/NiOx/PbS QDs/MAPbI3/PC61BM/Ag, exhibits an ultrabroad response from 300 to 1100 nm and presents high detectivity reaching 5.6 × 1011 and 6.5 × 1010 Jones in the VIS and NIR regions, respectively. The fast response time in the microsecond range and the response bandwidth of 10 kHz (f–3 dB) are comparable or even superior to counterparts. In addition, this approach provides ideas for the development of high-performance broadband perovskite-based optoelectronic devices.
研究领域:
材料科学
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光电子学
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半导体物理
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产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2017
·Vol. 164
·期 12
·H707
·
IF 3.259
Xingzhi Wang,Zhuang Wang,Miao Zhang,Xishun Jiang,Yanfen Wang,Jianguo Lv,Gang He,Zhaoqi Sun
TiO2 nanorod (TNR) arrays have been sensitized by CdS, PbS, CdS/PbS, and PbS/CdS quantum-dots (QDs). The TNR arrays were synthesized by a hydrothermal treatment, and QDs were deposited on the arrays by a successive ionic layer adsorption and reaction (SILAR) technique. The morphology, structure, composition, optical, photoelectrochemical (PEC), and photocatalytic (PC) properties were systematically investigated. The results demonstrate that TNR/QDs can effectively facilitate photoinduced carrier transport, suppress the recombination rate of electron-hole pairs, and improve the visible light absorption, PEC, and PC properties. The TNR/CdS(7)/PbS(3) sample shows the maximal photocurrent density (0.91 mA/cm2) and photodegradation efficiency (97.3%), which is nearly 37.9 and 2.89 times higher than those of bare TNR, respectively. The enhanced properties are attributed to the narrow band gaps and high absorption coefficients of QDs, and the type-II nanoheterostructures with a staggered alignment of band edges at the hetero-interface that can facilitate the spatial separation of electron-hole pairs.
研究领域:
材料科学
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纳米技术
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光化学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2025
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IF 5.5
Minghong Rui,Xiaokang Lu,Yuan Li,Sanmin Liu,Xiuhong Jin,Sumei Wang
Antimony sulfide (Sb2S3) has emerged as a promising photoactive material due to its high light absorption capability. However, the organic Spiro-OMeTAD hole transport layer (HTL) poses a severe challenge to highly efficient Sb2S3 solar cells because of its high cost and poor stability. To address these issues, a MnS–PbS composite HTL was fabricated via the coevaporation process for the first time. By tuning the MnS:PbS ratio, the microstructure, carrier transport, and energy band alignment at the Sb2S3/ MnS–PbS interface were optimized. The high carrier mobility of PbS films and the high carrier concentration of MnS films enabled the MnS–PbS composite HTL possessing the superior conductivity. Devices employing the optimized MnS–PbS HTL achieved a champion power conversion efficiency of 6.60%, with significant improvements in short-circuit current, fill factor, and photostability due to the enhanced hole transport, suppressed recombination, and reduced photocurrent loss. This facile coevaporated composite HTL demonstrates a significant potential for efficient fully inorganic Sb2S3 solar cells.
研究领域:
光伏技术
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材料科学
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半导体器件
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薄膜技术
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2018
·
IF 5.018
Tao Zeng,Xiaoli Su,Shile Feng,Yi Xie,Yunxia Chen,Zongyang Shen,Wei Shi
The electron-transport layer (ETL) between the PbS colloidal quantum dots (CQDs) active layer and the FTO substrate plays a crucial role in the associated heterojunction photovoltaics . However, the presence of surface defects in the ETL limits the performance of the photovoltaics. Herein, we report the improved carrier extraction at the TiO 2 /PbS interface of planar PbS CQDs photovoltaics, which can be easily accomplished through pre-implanting thermally stable hydroxyl radicals on the surface of TiO 2 nanoparticles (NPs) for constructing ETL. The pre-implantations on the surface of TiO 2 NPs realized using HNO 3 aqueous solution treatment under the hydrothermal condition surprisingly wouldn’t be completely removed after the annealing procedure necessary for preparing the conventional ETL, and effectively eliminate the interband trap sites of the TiO 2 NPs by passivating intrinsic oxygen-deficient defects for achieving well-matched electron affinity and work function. As expected, the interfacial bimolecular recombination events are obviously suppressed thanks to the well-acceptable trap densities existing in TiO 2 ETL as well as favorable interfacial band alignment for carrier extraction. Consequently, the power conversion efficiency (PCE) is pushed up to 9.31%, much better than the control competitors. Undoubtedly, this work provides another opportunity for optimizing performance of the relevant PbS CQDs photovoltaics resorting to interface engineering guideline.
研究领域:
材料科学
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光伏技术
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Lixiang Xu,Lulu Huang,Weite Meng,Chenxin Wang,Shaoqing Lu,Shanhong Wan,Mengyao Li,Xuan Yang,Qingyue Wang,Wen-Jun Wang,Andreu Cabot,Yu Zhang,Yu Liu,Khak Ho Lim
Lead sulfide (PbS) is an earth-abundant thermoelectric (TE) material. Cu, despite being an effective dopant, becomes thermally mobile at elevated temperatures, causing interfacial reactions and compositional inhomogeneity that undermine structural and electronic stability. In this study, we report a composite route that integrates colloidal PbS nanocrystals (NCs) with aqueous-synthesized Cu-doped PbS NCs to form PbS-based nanocomposites. The approach integrates high Cu-doping efficiency in aqueous synthesized NCs and structural robustness of colloidal NCs, thereby suppressing Cu migration at elevated temperature and improving thermal stability and mechanical robustness. The microstructure yields dense grain boundaries and heterointerfaces, where traces amount of Cu 2 S nanodomains are present, thereby modulating carrier concentration while enhancing phonon scattering. The nanocomposites exhibit 37% increase in mechanical strength, superior thermal stability over consecutive heating-cooling cycles and prolonged isothermal test, and reduced lattice thermal conductivity of 0.63 W m −1 K −1 , resulting in a peak zT of ∼1.1 at 790 K. Furthermore, a single-leg TE device fabricated from the optimized composite achieves a conversion efficiency of 6.3% at ΔT = 449 K, exceeding that of most PbS-based counterparts operating at similar temperatures. This study demonstrates a microstructure and defect-engineering that balances efficiency with long-term service reliability for PbS-based TEs.
研究领域:
材料科学
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热电学
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纳米材料
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固体物理
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能量转换
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Advances
·
2024
·
IF 4.6
Huu Phuc Dang,Ha Thanh Tung,Nguyen Thi My Hanh,Nguyen Thuy Kieu Duyen,Vo Thi Ngoc Thuy,Nguyen Thi Hong Anh,Hieu Van Le
This study developed a novel PbS-rGO composite counter electrode to enhance the performance of quantum dot-sensitized solar cells (QDSSCs). The composite was synthesized via a hydrothermal method by anchoring PbS nanocubes onto reduced graphene oxide (rGO) sheets. The effect of mass ratios of rGO to PbS (0.0, 0.1, 0.3, and 0.6) to a power conversion efficiency (PCE) was investigated. The optimized rGO-PbS (0.03) composite achieved a power conversion efficiency of 5.358%, Voc of 0.540 V, Jsc of 21.157 mA/cm², and FF of 0.516. The rGO framework provides an interconnected conductive network that facilitates efficient charge transport, reduces the charge transfer resistance, and improves the overall conductivity. Electrochemical analyses confirmed the superior electrocatalytic activity of the composite in reducing the Sn²⁻/S²⁻ redox couple. The unique band alignment between rGO and PbS optimized the electron transfer pathways. The hierarchical structure increased the surface area and light absorption, enabling a more effective charge transfer at the electrode-electrolyte interface.
研究领域:
材料科学
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能源技术
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Qihuang Deng,Jiangqiong Wang,Peiyao Chen,Maolin Bo,Ya’na Lu,Yuanfeng Pan,Hong Liu,Wanshan Duan,Jimin Xie,Yefeng Feng
Scattering medium-bandgap semiconductors into polymers cannot remarkably improve the dielectric constant in composites. Nanoscale ceramic leads to a high interface leakage current. To obtain a high dielectric constant and low loss, in this work, graphitic carbon nitride (g-C 3 N 4 )@PbS microparticles were prepared for fabricating polymer-based ternary composites. Polymer/PbS binary composites were also fabricated. In terms of electric properties, ternary composites show more advantages than binary composites. In ternary composites, the improved dielectric constant is ascribed to S N bonding at the g-C 3 N 4 /PbS interface. Decreased dielectric loss is rooted in the reduced interface leakage current (from the large size of the hybrid filler) between the polymer and PbS. Under high fields, the reduced breakdown strength is attributed to the reduced bandgap in the hybrid filler compared with PbS and g-C 3 N 4 . The innovation of this work is the high-efficiency collaboration between microsized and interfacial S N bonding in g-C 3 N 4 @PbS filler. The ternary composite with 15 wt% hybrid filler has a high dielectric constant of ~ 39 and a low dielectric loss of ~ 0.04 at 100 Hz (low field) as well as a high breakdown strength of ~ 202 MV m −1 under a direct-current field. This work might enlighten the fabrication of polymer composites with great promise in energy storage.
研究领域:
材料科学
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电气工程
✓ 已验证
DOI
高影响因子
Journal of Physics-Photonics
·
2021
·Vol. 3
·期 2
·024015
·
IF 0
Wei Zhao,Qianqian Huang,Kai Li,Chenyu Gao,Xi Cheng,Yuyang Yan,Qiang Guo,Xiaolan Sun,Chengbo Mou
We demonstrate a high-energy noise-like pulse (NLP) generated by an Er-doped fiber (EDF) laser incorporating a PbS quantum dot (QD) polystyrene (PS) composite film as a saturable absorber (SA). Benefitting from the intrinsic properties of NLPs and the high damage threshold of the PbS QD PS composite film, a stable NLP train can be obtained with an output power of 96.3 mW at a pump power of 660 mW, corresponding to a pulse energy of 9.68 nJ. This represents the highest pulse energy ever reported in an NLP EDF laser incorporating material-based SAs. The slope efficiency reached 17.37% and the steady NLP operation was able to be maintained for several hours under laboratory conditions. Our experimental results prove that the PbS QD PS composite film can serve as an effective SA to realize high-energy pulses in a mode-locked fiber laser.
研究领域:
光学
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材料科学
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物理学
✓ 已验证
DOI
CRYSTAL GROWTH & DESIGN
·
2025
·
IF 3.4
Jingsong Liu,Songyao Wu,Zhe Dong,Meizi Yang,Fengyuan Zhang,Guowei Li,Hangyu Yan,Mengdai Luoshan
Multicomponent heterojunctions have attracted considerable attention for the potential applications in photodriving applications. However, the limited number of active sites on the surface and the rapid recombination of photogenerated carriers restrict the improvement of the performance of photothermal conversion and photocatalytic degradation. Here, a ternary nanohybrid composed of PbS, Pt, and TiO2 is presented for the first time. PbS nanocrystals evolved from octahedral to a unique 24-faceted morphology were monitored and described systematically. Then, they were selectively deposited by Pt nanoparticles and coated with a TiO2 thin nanoshell. Under 808 nm near-infrared laser irradiation, the photothermal conversion performance and photocatalytic reduction rates of these nanohybrids were investigated in depth. Among them, the PbS-Pt-TiO2 nanohybrids exhibited the highest photothermal conversion efficiency and fastest degradation speed of Rhodamine B when compared to PbS-Pt and pure PbS, which are attributed to the effective light absorption of 24-faceted PbS nanocrystals and the outer TiO2 shell, the abundant catalytic active sites provided by Pt nanoparticles, and the excellent separation and transportation efficiency of hot carriers between different components.
研究领域:
纳米材料
·
光催化
·
能量转换
·
材料科学
·
光学材料
✓ 已验证
产品关联
DOI
高影响因子
Chinese Physics B
·
2018
·Vol. 27
·期 1
·018503
·
IF 1.321
Shuaipu Zang,Yinglin Wang,Meiying Li,Wei Su,Meiqi An,Xintong Zhang,Yichun Liu
Depleted bulk heterojunction (DBH) PbS quantum dot solar cells (QDSCs), appearing with boosted short-circuit current density ({J}_{\mathrm{sc}}), represent the great potential of solar radiation utilization, but suffer from the problem of increased interfacial charge recombination and reduced open-circuit voltage ({V}_{\mathrm{oc}}). Herein, we report that an insertion of ultrathin Al2O3 layer (ca. 1.2 Å thickness) at the interface of ZnO nanowires (NWs) and PbS quantum dots (QDs) could remarkably improve the performance of DBH-QDSCs fabricated from them, i.e., an increase of {V}_{\mathrm{oc}} from 449 mV to 572 mV, {J}_{\mathrm{sc}} from 21.90 mA/cm2 to 23.98 mA/cm2, and power conversion efficiency (PCE) from 4.29% to 6.11%. Such an improvement of device performance is ascribed to the significant reduction of the interfacial charge recombination rate, as evidenced by the light intensity dependence on {J}_{\mathrm{sc}} and {V}_{\mathrm{oc}}, the prolonged electron lifetime, the lowered trap density, and the enlarged recombination activation energy. The present research therefore provides an effective interfacial engineering means to improving the overall performance of DBH-QDSCs, which might also be effective to other types of optoelectronic devices with large interface area.
研究领域:
材料科学
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光电子学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Optoelectronics
·
2023
·Vol. 16
·期 1
·1-10
·
IF 5.4
Zhao Xinzhao,Li Mingyu,Ma Tianjun,Yan Jun,Khalaf Gomaa Mohamed Gomaa,Chen Chao,Hsu Hsien-Yi,Song Haisheng,Tang Jiang
Infrared solar cells are more effective than normal bandgap solar cells at reducing the spectral loss in the near-infrared region, thus also at broadening the absorption spectra and improving power conversion efficiency. PbS colloidal quantum dots (QDs) with tunable bandgap are ideal infrared photovoltaic materials. However, QD solar cell production suffers from small-area-based spin-coating fabrication methods and unstable QD ink. Herein, the QD ink stability mechanism was fully investigated according to Lewis acid–base theory and colloid stability theory. We further studied a mixed solvent system using dimethylformamide and butylamine, compatible with the scalable manufacture of method-blade coating. Based on the ink system, 100 cm 2 of uniform and dense near-infrared PbS QDs (~ 0.96 eV) film was successfully prepared by blade coating. The average efficiencies of above absorber-based devices reached 11.14% under AM1.5G illumination, and the 800 nm-filtered efficiency achieved 4.28%. Both were the top values among blade coating method based devices. The newly developed ink showed excellent stability, and the device performance based on the ink stored for 7 h was similar to that of fresh ink. The matched solvent system for stable PbS QD ink represents a crucial step toward large area blade coating photoelectric devices. Graphical Abstract
研究领域:
材料科学
·
太阳能
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）