Applied Sciences-Basel
·
2018
·Vol. 8
·期 7
·1195
·
IF 1.689
Yanru Chen,Xianglin Mei,Xiaolin Liu,Bin Wu,Junfeng Yang,Junyu Yang,Wei Xu,Lintao Hou,Donghuan Qin,Dan Wang
The CdTe nanocrystal (NC) is an outstanding, low-cost photovoltaic material for highly efficient solution-processed thin-film solar cells. Currently, most CdTe NC thin-film solar cells are based on CdSe, ZnO, or CdS buffer layers. In this study, a wide bandgap and Cd-free ZnSe NC is introduced for the first time as the buffer layer for all solution-processed CdTe/ZnSe NC hetero-junction thin-film solar cells with a configuration of ITO/ZnO/ZnSe/CdTe/MoOx/Au. The dependence of the thickness of the ZnSe NC film, the annealing temperature and the chemical treatment on the performance of NC solar cells are investigated and discussed in detail. We further develop a ligand-exchanging strategy that involves 1,2-ethanedithiol (EDT) during the fabrication of ZnSe NC film. An improved power conversion efficiency (PCE) of 3.58% is obtained, which is increased by 16.6% when compared to a device without the EDT treatment. We believe that using ZnSe NC as the buffer layer holds the potential for developing high-efficiency, low cost, and stable CdTe NC-based solar cells.
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CRYSTENGCOMM
·
2021
·Vol. 23
·期 39
·6899-6908
·
IF 3.545
Huimin Wang,Tingting Wang,Zibin Huang,Yizhuo Liu,Dehui Leng,Junli Wang
The growth of metal chalcogenide nanowires (NWs) on metal substrates is challenging work since the direct reactions taking place between the chalcogen (S, Se or Te) and zero-valent metal (M0) are frequently unable to regulate the crystallization of nanocrystals in an anisotropic one-dimensional (1D) manner. We here report the use of Ag2Se seeds as catalyst particles to realize the growth of metal selenide (MSe) NWs on their respective metal foil or flakes, including ZnSe/Zn, CdSe/Cd, and MnSe/Mn material systems. Metal foil or flakes (M = Zn, Cd and Mn) serve as a support substrate as well as a metal cation source during the NW synthesis. The preformed Ag2Se seeds play the roles of not only catalytic particles that initiate a so-called solution–solid–solid process to produce crystalline MSe NWs on metal substrates, but also inert impurities that promote an electrochemical anodic reaction of the metal to supply metal cations (M0 − 2e → M2+) for the NW formation. The microstructural studies by HRTEM reveal the polytypism and particularly the diameter-dependence of crystal phases and growth directions in the resulting MSe NWs, which can be rationalized from the viewpoints of the energetics and the catalyst/NW interfacial structures. These semiconductor NWs grown on metal foil or flakes may find wide use in photoelectric catalysis and devices without a transfer process of free-standing NWs onto a conductive support substrate.
研究领域:
材料科学
·
纳米技术
·
半导体物理
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Fan Shi,Shuangyi Yuan,Ranran Hu,Hang Xiao,Shaolu Zhang,Chenyang Wang,Xiangtong Zhang,Huaibin Shen
Indium phosphide (InP)-based quantum dots (QDs) have emerged as a promising alternative to cadmium-containing QDs for photonic applications. Nonetheless, the evolution of the synthesis chemistry for InP-based QDs poses a significant challenge, particularly with regard to morphological control. This study demonstrates efficient morphological control of square and spherical green-emissive InP/ZnSe/ZnS QDs. The formation of square-shaped QDs is attributed to the fluoride-induced suppression of {111} facet growth, which promotes shell growth along the {100} facets. Conversely, spherical QDs emerge owing to weak suppression of {111} facet growth. The fluoride is derived from the reaction between ZnF2 powder and oleic acid. It has been demonstrated that coordination between TOP and oleic acid effectively impedes this reaction. Beyond photoluminescence, the QDs exhibit strong and narrow radioluminescence (RL) at 565 nm with a full width at half maximum (FWHM) of 42 nm under X-ray excitation with a light yield of 4.2 × 103 photons/MeV. A QD X-ray imaging film was demonstrated to successfully visualize the internal components of opaque objects. This work demonstrates a ligand-mediated strategy for the morphological control of InP-based QDs and highlights their potential for X-ray imaging.
研究领域:
纳米材料
·
量子点
·
X射线成像
·
合成化学
·
光电子学
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MATERIALS LETTERS
·
2020
·
IF 3.204
Peng Zhou,Mingyu Zhang,Qizhong Huang Zhang,Zean Su,Yafeng Wang,Xiaodong Wang,Yueli Hu,Yuhao Li,Zhenghao Guo
To realize high capacity and long cycling stability for lithium-ion batteries (LIBs), a new type bimetal selenides MnSe/ZnSe encapsulated in nitrogen-doped carbon nanofibers (MZS@N-CNFs) have been fabricated for lithium ion battery via electrospinning and selenization processes. Synergistic effect of the ultrafine bimetal selenides nanoparticles provides a high specific capacity while the 1D carbon nanofibers can shorten the ions pathways and improve the conductivity. When assembled as anodes for LIBs, the MZS@N-CNFs demonstrate an extremely high capacity of 1369.1 mA h g −1 and excellent cycle stability of 826.1 mA h g −1 at 1 A g −1 after 300 cycles.
研究领域:
材料科学
·
能源存储
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Journal of Materials Chemistry C
·
2015
·Vol. 4
·期 4
·857-862
·
IF 4.696
Xiwei Zhang,Jiansheng Jie,Xiujuan Zhang,Fengjun Yu
Au catalysts have been found to diffuse into semiconductor nanostructures and form non-radiative recombination centers during the synthesis process. This adverse impact is even more on the p-type doping of ZnSe nanostructures due to the self-compensation effect. Herein, low melt-point Bi was used as a catalyst for the synthesis of p-ZnSe nanowires via the VLS mechanism while the incorporation of Bi catalyst atoms causes effective p-type doping in the as-grown nanostructures. Top-gate MISFETs were fabricated to confirm the p-type conduction of Bi-catalyzed and doped ZnSeNWs. Temperature-dependent electrical measurements were used for understanding the charge transport mechanism and the doping effect of semiconductors. The thermal activation behavior of carriers is considered to dominate in the temperature range of 150–300 K while the 3D Mott VRH mechanism is considered to prevail over other mechanisms in the lower temperature range of 50–140 K.
研究领域:
纳米材料
·
半导体物理
·
电子输运
·
纳米电子学
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yudong Wang,Junhui He,Haixin Li,Qiuxiang Yang,Lin Peng,Shounian Cheng,Yu Han,Yang Jie,Xia Cao
In this study, cadmium-free InP/ZnSe core–shell quantum dots (QDs) were synthesized using the hot-injection method, with the measured barrier height of the PN junction being approximately 0.441 eV. The core–shell structure significantly improved the photoluminescence quantum yield (PLQY) compared to that of bare InP QDs, with enhanced optical properties and stability due to effective lattice matching between InP and ZnSe, reducing interfacial defects. These QDs were integrated into a hybrid energy-harvesting device by combining a triboelectric nanogenerator (TENG) and a photovoltaic (PV) thin film. The TENG, based on a PMMA–QDs composite film, achieved a high output power density of 191.13 μW/cm2 under 3 Hz mechanical excitation, while the PV device exhibited a light-switching ratio as high as 73.5, demonstrating excellent photoresponsivity. Additionally, a smart security lock system was developed, utilizing the TENG’s personal information recognition capability to authorize access based on a friction-generated electrical signal, with an integrated alarm system to detect unauthorized code acquisition via light-excited fluorescent substances. This dual-response energy system offers a promising approach for efficient and reliable energy harvesting with potential applications in sustainable electronics and self-powered IoT devices.
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CHEMICAL PAPERS
·
2024
·Vol. 78
·期 14
·7943-7950
·
IF 2.1
Li Zhigang,Liu Xuzhuo,Wang Chunlong,Song Hanbing,Zhang Jie
In this study, we synthesized zinc selenide (ZnSe)-polyacrylamide (PAM) nanomaterials for their potential application in treating knee osteoarthritis (KOA). Initially, we characterized the newly prepared material through various techniques including Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption–desorption to confirm its identity as the desired product. The results demonstrated that ZnSe-PAM nanomaterial exhibited excellent water solubility, biocompatibility, and stability, along with a large surface area, making it suitable for use as a drug carrier. Subsequently, the material was loaded with the drug 1 to obtain ZnSe-PAM@1. Cellular and thermosensitive experiments were then conducted, revealing that this nanomaterial could facilitate drug release by generating heat, thereby reducing the level of microRNA-146a-5P and blocking the phosphoinositide 3-kinase/protein kinase B/mammalian target of rapamycin/extracellular (PI3K/Akt/mTOR/ERK) signal-regulated kinase signaling pathway, thus alleviating the symptoms of KOA. These findings present a new direction for drug intervention in KOA and highlight the potential of developing ZnSe-PAM nanomaterials as novel drug carriers.
研究领域:
材料科学
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医学
·
生物技术
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Xiangfei Zheng,Guichun Mo,Yongyu He,Dongmiao Qin,Xiaohua Jiang,Weiming Mo,Biyang Deng
[email protected] QDs were synthesized by a simple one-step method. The prepared [email protected] quantum dots ( [email protected] QDs) composite showed a strong cathode ECL emission using potassium persulfate (K 2 S 2 O 8 ) as a co-reactant. The poly-(diallyldimethylammonium chloride) (PDDA) reduced graphene oxide (PDDA-rGO) composite provided a larger activity site could conjugate more [email protected] QDs and second antibody (Ab 2 ) to improve the sensitivity of the ECL immunosensor. The electrode modified with Au NPs was employed for immobilization of primary antibodies (Ab 1 ) and enhancing the electronic transmission rate of the immunosensor. A novel ECL immunosensor was constructed using Au NPs as a sensing platform and PDDA-rGO/ [email protected] QDs composite as signal probe for highly-sensitive carcinoembryonic antigen (CEA) detection in human serum. Under optimal conditions, a range of 0.0001–100 ng/mL and the detection limit of 0.029 pg/mL for CEA were obtained. This ECL immunosensor possesses long-term stability, good reproducibility and high sensitivity. These are promising qualities for detecting biomarkers, drugs, and environmental pollutants .
研究领域:
分析化学
·
生物传感器
·
纳米技术
·
医学诊断
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Ke He,Jianpeng Ma,Ye Zhang,Hui Li,Ning Guo,Hanfei Gao,Yuchen Wu
Quantum dot light-emitting diodes (QLEDs) have emerged as strong contenders for next-generation display technologies. However, the commercialization of blue QLEDs has been severely hindered by the inherent wide band gap of blue quantum dots (QDs), which results in a high hole injection barrier and imbalanced carrier injection. Herein, we demonstrate high-efficiency and high-luminance blue QLEDs by engineering gradient core/shell ZnCdSe/ZnSe/ZnSeS/ZnS QDs with a ZnSe intermediate shell layer. The ZnSe interlayer not only effectively passivates surface defects but also facilitates balanced carrier injection. This strategy achieves a remarkable maximum luminance of 54,554 cd m–2 and an external quantum efficiency (EQE) of 20.6%, representing a significant advancement in device performance. This work provides a strategy for developing high-performance blue QLEDs.
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高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2021
·
IF 1.134
Xiao-Xuan ZHANG,Wu-Bo CHU,Nan JIANG,He LI
Serum albumin is the most abundant protein in mammalian plasma and is often used as a model to understand the adhesion behavior of proteins on surfaces. Attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) is used to non-destructively and dynamically detect the chemical change information between the protein and the surface during the adhesion process, which is especially suitable for in-situ measurement of samples in water. Therefore, the adhesion of bovine serum albumin (BSA) on the surface in H 2 O and D 2 O is investigated by ATR-FTIR technology, which effectively avoids the interference of the characteristic peak of deformation vibration of liquid H 2 O (1645 cm −1 ) on the amide I band of BSA. Sodium alginate, a polysaccharide widely present in the ocean, is introduced into the BSA solution to explore the changes in the adhesion process of proteins on the surface of ZnSe, and polarized ATR-FTIR spectra are also collected to study the adhesion orientation of BSA. Sodium alginate presents a negative effect on the adhesion of BSA on the surface and there is no specific orientation of BSA on the surface.
研究领域:
生物化学
·
材料科学
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JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 43
·22873-22880
·
IF 5.968
Xiwei Zhang,Xiujuan Zhang,Xiaozhen Zhang,Yuping Zhang,Liang Bian,Yiming Wu,Chao Xie,Yuanyuan Han,Yan Wang,Peng Gao,Liu Wang,Jiansheng Jie
The narrow indirect bandgap of Si hinders the full absorption and utilization of the solar light. Energy band engineering to the Si based photovoltaic devices is essential to address this problem. Here we report the fabrication of ZnSe nanoribbon (ZnSeNR)/Si nanowire (SiNW) p–n heterojunction arrays by directly growing or simply drop-casting the p-type ZnSeNRs on highly aligned n-type SiNW arrays. Phosphorus (P) was used as dopant to achieve robust p-type doping in the ZnSe nanostructures with a hole concentration as high as 6.5 × 1018 cm−3. Thanks to the matched bandgap and the light trapping arising from the one-dimensional (1D) array structure, the heterojunction arrays exhibited improved light absorption, particularly in the blue/UV wavelength range. Moreover, by taking advantage of the ohmic contact between graphene and p-ZnSeNR, heterojunction array solar cells with graphene transparent electrode were fabricated, giving rise to a power conversion efficiency of ∼0.78% under AM 1.5G illumination. It was found that the surface passivation to the SiNW array played an important role in determining the device performance; an efficiency up to 2.27% was obtained after surface modification with methyl groups. Our results demonstrate the heterojunction arrays, together with the graphene transparent electrodes, could be promising candidates for high-performance and low-cost photovoltaic applications.
研究领域:
材料科学
·
纳米科技
·
半导体物理
·
光电子学
·
能源材料
·
表面科学
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高影响因子
Journal of Materials Chemistry C
·
2026
·
IF 5.1
Jie Li,Yantao Lou,Ze Wang,V. Balasubramani,Xingchen Zhang,Jiaren Wu,Guodong Lin,Baofeng Zhang,Yuanjie Teng
Surface-enhanced Raman scattering (SERS) enables sensitive molecular detection, yet conventional substrates often exhibit limited stability and poor reproducibility. Semiconductor substrates offer tunable electronic properties and structural robustness, but wide bandgaps and inefficient charge transfer often hinder their performance. Here, we present interface-engineered Er3+-doped ZnSe (Zn1−xErxSe) as a high-performance SERS platform. Controlled Er3+ incorporation, with an optimal doping of 6%, introduces defect states that enhance chemical (charge-transfer) mechanisms while increasing carrier density to strengthen the electromagnetic (plasmonic) response. Using methylene blue as a probe, the substrate achieves a detection limit of 3.24 × 10−8 M with excellent reproducibility. Density functional theory and Mott–Schottky analyses reveal that Er3+ doping reshapes the electronic band structure and enables efficient interfacial plasmon–charge coupling. The substrate also demonstrates potential for environmental sensing, achieving a low detection limit of 5.33 µg mL−1 for PET microplastics, thereby highlighting its suitability for trace-level pollutant monitoring. This work establishes rational interface and carrier engineering in semiconductors as a robust platform for high-performance SERS applications in analytical and environmental chemistry.
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