APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jinqian Zhang,Jun Liu,Yue Tian,Jiawen Guo,Wenjie Kong,Lizhen Long
Two-dimensional (2D) materials have emerged as promising candidates for photodetection applications, due to their unique structural and optical properties. Herein, we conducted a comprehensive investigation of the 2D Te-based photodetector. The crystal structure, angle-resolved polarized Raman (ARPR) spectroscopy, and theoretical analysis demonstrate the in-plane lattice anisotropy of Te, underlining its suitability for polarization-dependent photodetection. Photocurrent measurements over a broad spectral range (from 365 to 1310 nm) reveal excellent photoresponse characteristics, with responsivity ( R λ ) and detectivity ( D* ) values reaching up to 1189 A/W and 11.51 × 10 8 Jones, respectively, under 1064 nm illumination. Furthermore, the Te-based photodetector exhibits superior stability, retaining approximately 90 % of its initial performance after six months of ambient exposure. Polarization-sensitive photodetection experiments show significant dichroism ratios (up to 4.6 for 1064 nm illumination), emphasizing the potential of 2D Te for advanced polarization applications. The combination of the broad spectral response, high anisotropy ratio, and long-term stability positions 2D Te as a promising candidate for future photodetection technologies.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2021
·Vol. 34
·期 2
·2107206
·
IF 30.849
Xingang Wang,Tao Xiong,Kai Zhao,Ziqi Zhou,Kaiyao Xin,Hui-Xiong Deng,Jun Kang,Juehan Yang,Yue-Yang Liu,Zhongming Wei
2D materials have been attracting high interest in recent years due to their low structural symmetry, excellent photoresponse, and high air stability. However, most 2D materials can only respond to specific light, which limits the development of wide-spectrum photodetectors. Proper bandgap and the regulation of Fermi level are the foundations for realizing electronic multichannel transition, which is an effective method to achieve a wide spectral response. Herein, a noble 2D material, palladium phosphide sulfide (PdPS), is designed and synthesized. The bandgap of PdPS is around 2.1 eV and the formation of S vacancies, interstitial Pd and P atoms promote the Fermi level very close to the conduction band. Therefore, the PdPS-based photodetector shows impressive wide spectral response from solar-blind ultraviolet to near-infrared based on the multichannel transition. It also exhibits superior optoelectrical properties with photoresponsivity ( R ) of 1 × 10 3 A W −1 and detectivity ( D* ) of 4 × 10 11 Jones at 532 nm. Moreover, PdPS exhibits good performance of polarization detection with dichroic ratio of ≈3.7 at 808 nm. Significantly, it achieves polarimetric imaging and hidden-target detection in complex environments through active detection.
研究领域:
材料科学
·
光学工程
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Chunquan Li,Zhiming Sun,Ankang Song,Xiongbo Dong,Shuilin Zheng,Dionysios D. Dionysiou
Natural minerals are generally accepted as one of the most suitable carriers to support TiO 2 in photocatalytic and other applications because of their abundance, low cost, large surface area, and easy recyclability. Hence, in this work, a novel 0D/2D TiO 2 /kaolinite composite endowed with presence of oxygen vacancies and surface defect sites was synthesized through a mild sol-gel method combining with nitrogen induction. Ciprofloxacin (CIP) was taken as the main target organic pollutant to study the photocatalytic performance of the synthesized catalyst. The results showed that the nitrogen treated TiO 2 /kaolinite composite exhibited improving degradation performance for adsorption-photocatalytic elimination of CIP within broad radiation spectrum (200–800 nm). The synthesized composite exhibited enhanced reaction rate constant which is nearly 7.00, 2.54 and 3.13 times higher than that of bare TiO 2 treated with air under UV, solar, and visible light, respectively. Moreover, the newly prepared composite also exhibited significant enhancement towards the removal of formaldehyde under both UV and visible light. Radical scavenger experiments and ESR results indicated that holes should be the main oxidizing species within broad spectrum in the degradation system. The enhanced activity of nitrogen treated composite is mainly attributed to the induced oxygen vacancies as well as the intimate interface contact between TiO 2 and kaolinite , resulting in smaller grain size, higher light absorption ability, and faster carrier separation efficiency. It is expected that this high-efficiency composite photocatalyst based on natural minerals will be a promising candidate for the elimination of pharmaceutical and personal care products and volatile organic compounds within broad radiation spectrum.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ChemPlusChem
·
2018
·Vol. 83
·期 11
·1052-1056
·
IF 3.205
Wenxu Yin,Xiaoyu Zhang,Xue Bai,Dingke Xue,Xingwei Zhuang,Hongwei Song,William W. Yu
Graphical S-TOP and go ! A low-cost, one-pot synthesis of WS 2 quantum dots was devised that relies on activated elemental sulfur (S-TOP, S dissolved in tri-n-octylphosphine) instead of an organic sulfur source. Light-emitting devices prepared from this material display a high color rendering index of 93 (see figure). We report a facile and low-cost synthesis of WS 2 quantum dots with bright broad-band emission, which are suitable for lighting applications. The thus fabricated WS 2 light-emitting diodes (LEDs) exhibit voltage independent electroluminescence spectra, and the optimized white LEDs generate a high color rendering index of 93.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
Nano-Micro Letters
·
2023
·Vol. 15
·期 1
·1-13
·
IF 26.6
Gao Manyi,Tian Fenyang,Zhang Xin,Chen Zhaoyu,Yang Weiwei,Yu Yongsheng
A hybrid co-catalysts system comprising Au nanoparticles (NPs) and PtSAs with different functions was constructed on the polymeric carbon nitride (PCN) surface by double-solvent method.
For the dual co-catalysts, the Au NPs absorb relatively long-wavelength light to produce plasmonic hot-electrons, and the adjacent Pt single atoms (PtSAs) can trap the plasmonic hot-electrons effectively for H 2 evolution.
The PtSAs–Au 2.5 /PCN exhibits excellent broad-spectrum photocatalytic H 2 evolution activity with the H 2 evolution rate of 8.8 mmol g − 1 h − 1 at 420 nm and 264 μmol g − 1 h − 1 at 550 nm, respectively.
研究领域:
纳米技术
·
光催化
·
材料科学
·
等离激元学
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 22
·225204
·
IF 3.874
Yali Liu,Xiaoxiang Wu,Wenxuan Guo,Mengge Li,Xinyue Niu,Jiadong Yao,Ying Yu,Boran Xing,Xiaoyuan Yan,Shucheng Zhang,Jian Sha,Yewu Wang
Heterojunction integrated by two-dimensional/three-dimensional materials has shown great potential applications in optoelectronic devices because of its fast response speed, high specific detectivity and broad spectral response. In this work, the vertical n-Si/p-GaTe heterojunction has been designed and fabricated, which shows a high responsivity up to 5.73 A W−1 and a fast response time of 20 μs at zero bias benifitting from the high efficiency of light absorption, internal photocurrent gain and strong built-in electrical field. A specific detectivity of 1012 Jones and a broad spectral response ranging from 300 to 1100 nm can also be achieved. This work provides an alternative strategy for high-performance self-powered optoelectronic devices.
研究领域:
光电技术
·
材料科学
·
半导体器件
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2020
·Vol. 22
·期 32
·5355-5362
·
IF 3.117
Jianing Tan,Song Jiang,Binghui Ge,Bojia Xu,Baobao Cao
SnO2(ZnO:Sn)m is a new phase recently found in the diagram of a ZnO–SnO2 binary system in the form of a one-dimensional nanowire, which is a new group of superlattice oxide besides the widely known M2O3(ZnO)m (M = trivalent elements, such as In, Ga, and Al, and m = integer). Thereafter, more comprehensive structural and physical properties of SnO2(ZnO:Sn)m are still quite lacking due to the difficulties in high purity synthesis. In this study, we demonstrate a rational design for the growth of SnO2(ZnO:Sn)m superlattice nanowire arrays using a home-built double-tube chemical vapor deposition (CVD) system for the first time. The atomic microstructure of the nanowire array was investigated by Cs-corrected scanning transmission electron microscopy (STEM), and a phenomenon of unsaturated Sn occupation in Sn–O octahedral layers was observed. Two new vibrational modes at 276 cm−1 and 698 cm−1 were found in Raman measurement. The photoluminescence (PL) spectrum of SnO2(ZnO:Sn)m superlattice nanowires displays an interesting broad-spectrum emission in the range of around 380–570 nm. Kelvin probe force microscopy reveals that the average work function of SnO2(ZnO:Sn)m nanowires is in the range of 4.05–4.32 eV.
研究领域:
材料科学
·
物理化学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Wei-Feng Zhang,Wen-Jing Pan,Te Xu,Ru-Yang Song,Yan-Yu Zhao,Cheng-Yang Yue,Xiao-Wu Lei
In recent years, two-dimensional (2D) hybrid lead halide perovskites based on corner-shared [PbX6] octahedrons have received extensive attention with important potentials in single-component white-light emitting diodes (WLEDs) due to the soft and distorted crystal lattices. However, limited research focused on the one-dimensional (1D) perovskites although they possess similar structural superiorities to achieve this performance. Herein, by using different types of organic amine cations as structural direction reagents, we report one new type of hybrid 1D perovskites of APbCl3 (A = (DTHPE)0.5, DMTHP, DBN) based on the same 1D face-shared octahedral [PbCl3]− chains. Upon UV light excitation, these 1D APbCl3 perovskites exhibit intrinsic broad-band bluish white-light emissions covering entire visible light spectra with the highest photoluminescence quantum yield (PLQY) of 6.99%, which catches up with the values of previously reported 2D perovskites. Through the systematical studies of time-resolved, temperature-dependent PL emissions, theoretical calculations, and so on, these broad-band light emissions can be ascribed to the radiative transition within conjugated organic cations. The facile assembly process, intrinsic broad-band light emissions, and high PLQYs enable these 1D APbCl3 perovskites as new types of promising candidates in fabricating single-component WLEDs.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 11
·4125-4133
·
IF 8.262
Li Chen,Weilin Chen,Huaqiao Tan,Jiansheng Li,Xiaojing Sang,Enbo Wang
Quantum dot sensitized solar cells with high theoretical conversion efficiency, low production cost and a simple production process have received great attention in recent years. For CdSe-sensitized cells, the most significant defect of CdSe is that it has the weak absorption between 550 and 600 nm and no absorption after 650 nm, so it is crucial to find a wide spectrum photosensitizer to make up for the defect. Here, wide spectrum and pure inorganic Donor–Acceptor (D–A) Type Polyoxometalate (POM) K6H4[α-SiW9O37Co3(H2O)3]·17H2O (denoted as T) is firstly introduced into QDSCs as a collaborative cosensitizer with CdSe. The T has a visible characteristic peak centering between 550 and 600 nm, and also has stronger absorption after 650 nm, which could make up for the defect of CdSe to constitute a wide spectrum of absorption. The fluorescence spectrum, surface photovoltage spectrum, ultraviolet photoelectron spectroscopy spectrum and solid diffuse spectrum were used to explore the photosensitivity of T. In addition, the D–A type POM can act as a good intermediate for the injection of electrons and improve the visible photocurrent response; meanwhile, it can obviously reduce the dark current and increase the electron lifetime, which can solve the problem about the high recombination at the QD/TiO2/electrolyte interface. In general, the best photovoltaic performance of T and CdSe cosensitized solar cells is increased to 6.59% (Jsc = 18.37 mA cm−2, Voc = 0.57 V, FF = 0.63), which is improved by 32.33% compared to those of the pure CdSe-sensitized cells (Jsc = 16.20 mA cm−2, Voc = 0.50 V, FF = 0.61, η = 4.98%).
研究领域:
材料科学
·
太阳能
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2023
·Vol. 25
·期 15
·2237-2242
·
IF 3.1
Cunxin Li,Kaijia Xu,Lanjun Cheng,Zhichuan Wu,Yinyin Qian
Group I–V–VI2 nanocrystals have been considered as potential candidates in the field of optoelectronics due to their highly tunable semiconductor characteristics. AgSbTe2, one of the emerging group I–V–VI2 nanocrystals with optical phase-change properties, a high light absorption coefficient and wide spectral response, is attractive for eco-friendly photodetector devices. However, a colloidal synthetic route for obtaining highly crystalline AgSbTe2 nanocrystals with low toxicity precursors, which is vital to high-performance solution-processed photodetector devices, is still rare. Herein, we investigate the colloidal synthesis of quasi-cube AgSbTe2 nanocrystals from the reaction of commercially available AgNO3 with Sb(Ph)3 in oleylamine at 190 °C, followed by the injection of a tellurium source, which was prepared by directly dissolving TeO2 in 1-dodecanethiol. Simple AgSbTe2/ITO heterostructure photodetectors were fabricated by a low-temperature colloidal synthetic route in combination with the spin-coating technique, which exhibit good photoresponse in a wide range from 405 to 980 nm with fast response times (0.49 and 0.58 s) and excellent stability. This work suggests that ternary silver-based I–V–VI2 compound nanostructures have great potential for high-performance optoelectronic applications.
研究领域:
材料科学
·
纳米技术
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Shengdong Ran,Yuzhe Chen,Haiyang He,Qingwen Zhang,Xiaohu Liu,Yi Wang
Smart wearable ophthalmic devices such as contact lenses have gained widespread interest owing to their compactness, portability, and versatility and have emerged as the most promising, non-invasive, wearable devices for the treatment and diagnosis of a variety of ocular diseases. While contact lenses for the treatment of congenital eye diseases such as color vision deficiency (CVD) are reported, they show limited spectral adjustment range and the unavailability of blocking harmful light such as high-energy blue light (HEBL). In this study, silver nanoparticle (AgNP) based multifunctional contact lenses that can correct various types of CVDs and filter out harmful light are developed. AgNPs are controllably assembled via short-peptide-induced diffusion-limited aggregation and then integrated into the contact lenses. By varying the sequence and concentration of the peptides, the extinction value of the nanoparticles can be broadly tuned in the 400–600 nm range. The multifunctional contact lenses thus show wide spectral tunability and are capable of efficiently correcting multiple CVDs and blocking HEBL. The contact lenses are found to have excellent biocompatibility with cell and animal tests. In conclusion, the multifunctional contact lenses provide a candidate for the correction of CVD and protection against HEBL, and pave the way for personalized wearable ophthalmic devices.
研究领域:
眼科学
·
纳米技术
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
InfoMat
·
2021
·Vol. 4
·期 3
·e12258
·
IF 25.405
Ruixue Bai,Tao Xiong,Jinshu Zhou,Yue-Yang Liu,Wanfu Shen,Chunguang Hu,Faguang Yan,Kaiyou Wang,Dahai Wei,Jingbo Li,Juehan Yang,Zhongming Wei
Low-dimensional semiconductors with in-plane anisotropy and narrow bandgap have been extensively applied to polarized detection in the near-infrared (NIR) region. However, the narrow bandgap can cause noise owing to the high dark current in photodetectors. This article reports quasi-1D ZrGeTe 4 nanoribbon-based photodetectors with low dark current and broadband polarization detection. The photodetector was fabricated by evaporating 50-nm-thick Au electrodes on a ZrGeTe 4 nanoribbon. Benefiting from the photovoltaic characteristics in the ZrGeTe 4 nanoribbon and Au electrodes, these photodetectors can operate without bias voltage, with decreased dark current, and improved device performance. Furthermore, the quasi-1D ZrGeTe 4 nanoribbon-based photodetectors demonstrate a polarization sensitivity in a broadband from visible (VIS) to the NIR region, such as a high photoresponsivity of 625.65 mA W −1 , large external quantum efficiency of 145.9% at 532 nm, and photocurrent anisotropy ratio of 2.04 at 1064 nm. They exhibit a novel perpendicular optical reversal of 90° in polarization-sensitive photodetection, angle-resolved absorption spectra, and azimuth-dependent reflectance difference microscopy (ADRDM) from VIS to the NIR region, as opposed to other nanoribbon-based polarization-sensitive photodetectors. This work paves the way for utilizing photovoltaic photodetectors based on low-dimensional materials for broad-spectrum polarized photodetection.
研究领域:
材料科学
·
光电子学
·
光子学
✓ 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）