JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2023
·Vol. 53
·期 12
·2411-2419
·
IF 2.9
Mai Manfang,Liao Bin,Liao Yijun,Lin Donghai,Ma Xinzhou
GaTe thin films are electrochemically deposited on indium tin oxide for photoelectrochemical applications. The electrochemical deposition behavior of GaTe thin films in acidic solution of HTeO 2 + with Ga 3+ is studied with cyclic voltammetry combining with operando transmittance spectroscopy. Underpotential deposition of Ga on Te starts at potential of − 0.35 V. The presence of Ga 3+ in the solution can strongly suppressed the formation of H 2 Te. XPS analysis reveals that Ga-rich GaTe is deposited over a wide potential range. The photoelectrochemical performance of the thin films as photocathodes is strongly dependent on the deposition potential. The GaTe films deposited at − 1.0 V produced the highest photocurrent of about − 0.03 mA cm −2 . Meanwhile the film deposited at − 0.35 V shows improved performance during photoelectrochemical measurement, which can be ascribed to the increased GaTe content during photoelectrochemical measurements, as confirmed by XPS analysis. Graphical
研究领域:
材料科学
·
电化学
·
半导体物理
·
光电功能材料
·
能源材料
·
表面科学
·
薄膜技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 91
·74251-74255
·
IF 3.84
Juan-Ye Wang,Hong-Dan Peng,Jia-Mei Yang,Jing-Hui Yan,Ge-Bo Pan
We develop a facile approach for the one-step growth of ultralong and high-quality NiOEP nanowires in a large area, through a solvent-induced self-assembly method without using any structure directing agents. The size of the nanowires can be controlled by changing the composites of solvent mixtures. Being assembled in visible-light sensors, these nanowires exhibit a fast, reversible, and stable response. The highest Ion/Ioff ratio and photoresponsivity of photodiodes could reach 681 and 10.1 mA W−1, respectively, which could be attributed to the perfect single crystal quality, large surface to volume ratio, and fewer recombination barriers within the nanostructures. The facile fabrication and good photoresponse make NiOEP nanowires promising in optoelectronic applications.
研究领域:
材料科学
·
纳米科技
·
光电子学
·
物理化学
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2011
·Vol. 21
·期 18
·6736-6741
·
IF 5.101
Xiwei Zhang,Jiansheng Jie,Zhi Wang,Chunyan Wu,Li Wang,Qiang Peng,Yongqiang Yu,Peng Jiang,Chao Xie
Single-crystal p-type ZnSe nanowires (NWs) with zinc blende structure and [21–1] growth direction were synthesized by using bismuth (Bi) as dopant via a thermal co-evaporation method. The ZnSe : Bi NWs showed evident p-type conductivity with hole concentration up to 4.1 × 1018 cm−3 after the acceptor activation. Negative photoconductivity was first investigated in the p-ZnSe NWs, i.e., the conductivity of the NWs under light was dramatically lower than that in the dark. Surface effects arising from oxygen absorption and photo-desorption were suggested to be responsible for this. By using Al as the Schottky gate, high-performance nano-metal-semiconductor field-effect transistors (nanoMESFETs) were constructed, and measurements on the Al/p-ZnSe NW Schottky diode also revealed the bias-dependent photoresponse. It is expected that the p-type ZnSe : Bi NWs will have great potential in nano-optoelectronic applications.
研究领域:
材料科学
·
半导体物理
·
纳米技术
·
光电子学
·
凝聚态物理
✓ 已验证
DOI
高影响因子
Physica Status Solidi-Rapid Research Letters
·
2023
·Vol. 18
·期 2
·2300183
·
IF 2.8
Lei Xu,Mengtong Yang,Qidong Lu,Yuxin Ren,Yi Chen,Jinjia Guo,Mingjie Cai,Xiao Miao,Feng Teng,Haibo Fan,Chunmei Zhang,Xuexia He,Peng Hu
Broadband photodetectors are essential for the integrated design of next-generation optical detector devices. Ternary 2D bismuth sulfide semiconductor (BiXI, X = S, Se, Te) is an ideal candidate for broadband photoelectric detection due to its narrow bandgap and excellent electrical transport performance. Here, BiSeI is grown by chemical vapor transport (CVT) method and used in photoelectrochemical (PEC) photodetection. The PEC-type photodetector based on BiSeI nanosheets has a broadband detection ranging from 350 to 900 nm, displaying a high responsivity of 2.88 mA W −1 , a high detectivity of 1.10 × 10 10 Jones and a fast response time of 7/16 ms at a bias voltage of 0.5 V. Furthermore, the device also exhibits a negligible current density loss after three months, which indicates that it has good stability against air and moisture. In addition, the photodetector can work without bias potential, indicating that it is a good self-powered device. The results demonstrate that BiSeI is a potential material in self-powered PEC photodetector.
研究领域:
材料科学
·
纳米科技
·
光电子学
·
半导体物理
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Xi-Ming Song,Xin Zhou,Chunxue Yuan,Yu Zhang,Qiang Tong,Ying Li,Luxia Cui,Daliang Liu,Wei Zhang
We reported a novel Fe 2 O 3 /rutile TiO 2 nanorod (NR) arrays with the heterogeneous structure for photoelectrochemical (PEC) cells, which were fabricated on fluorine-doped tin oxide glass (FTO) substrates that serve as model architecture via a hydrothermal method. Fe 2 O 3 was revealed as an inexpensive and eco-friendly semiconductor sensitizer to make TiO 2 respond to visible light . By using this photoanode, the photoelectric conversion and water splitting properties of PEC cells based on the one-dimensional (1D) Fe 2 O 3 /TiO 2 heterostructures were investigated in detail under simulated sunlight. Meanwhile, the optimization of photovoltaic performance was also achieved by regulating the amount of Fe 2 O 3 . The open circuit voltage and short circuit current of the Fe 2 O 3 /TiO 2 solar cell can reach 0.435 V and 1.840 mA/cm 2 , respectively. In addition, theoretical analysis of the photoelectric effect is preliminarily explored on the basis of the flat band potential results.
研究领域:
材料科学
·
物理化学
·
能源科学
·
纳米科技
·
光催化
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 25
·9816-9821
·
IF 8.262
Li Cheng,Qing Chang,Yu Chang,Nannan Zhang,Changyuan Tao,Zhaona Wang,Xing Fan
Hierarchical forest-like photoelectrodes were prepared by assembling nano-ZnO on an array of micro-metal dendrites, aiming to demonstrate the idea of highly efficient photon-harvesting inside a biomimetic dendrite structure. Via a facile aqueous electrochemical deposition process, the metal dendrites were deposited on both flat and wire substrates with different alignments, showing wide adaptability. A strong, broadband anti-reflection effect was observed, owing to the diffuse reflection inside the microdendrites. By increasing the dendrite height, the overall reflectivity of the metal electrode can be reduced from 75% to 45%, which could be further reduced to 12% after combining with acicular-leaf-like ZnO nanoarrays. Its applications in light-driven water splitting were successfully demonstrated. Taking advantage of the forest-like photoelectrode, we have artificially constructed an efficient photo-electrochemical system similar to plants in a forest, with photons harvested by the crown-like photoanodes in the sunshine, and synthetic reactions driven by the root-like electrode in the shadow.
研究领域:
材料科学
·
纳米科技
·
光电化学
·
可再生能源
·
仿生学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 46
·期 10
·16524-16532
·
IF 3.83
Muhammad Yousaf,Asma Noor,Shuai Xu,Majid Niaz Akhtar,Baoyuan Wang
Yttrium iron garnet (YIG) nanoparticles (NPs) doped with rare earth (RE) metal ions (Y 2.5 Sm 0.5 Fe 5 O 12 , Y 2.5 Nd 0.5 Fe 5 O 12 ) were successfully synthesized by sol-gel auto combustion approach. The cubic crystalline structure and morphology of the prepared garnet ferrite NPs were analyzed by X-ray diffractometer (XRD) and field emission scanning electron microscopy (FESEM). The cubic crystalline garnet phase of the synthesized YIG, Sm-YIG and Nd-YIG samples was successfully achieved at 950 °C sintering temperature . The force constant and absorption bands were estimated by using Fourier transform infrared spectroscopy (FTIR). The doping effect of RE metal ions on the chemical states of YIG were examined by x-ray photoelectron microscopy (XPS). The valence band (from 12.63 eV to 13.22 eV), conduction band (from 10.89 eV to 11.34 eV) edges and optical bandgap values of RE doped YIG samples were calculated using UV–Vis spectroscopy and ultraviolet photo electron spectroscopy (UPS). The magnetic analysis of the prepared NPs was studied using vibrating sample magnetometer (VSM). The XPS analysis of RE doped YIG samples exhibit the existence of RE (Sm +3 , Nd +3 ) contents on the surface of YIG ferrite by decreasing the oxygen lattice in garnet structure. The optical bandgap (from 1.74 eV to 1.88 eV) explains the semiconducting nature of the synthesized NPs. The UPS results confirm the valence band position of YIG doped samples. The saturation magnetization and remanence of RE doped garnet ferrite samples increased from 13.45 to 18.83 emu/g and 4.06–6.53 emu/g, respectively.
研究领域:
材料科学
·
纳米科技
·
固体物理
·
无机化学
·
功能材料
✓ 已验证
DOI
高影响因子
Sustainable Energy & Fuels
·
2020
·Vol. 4
·期 6
·2800-2807
·
IF 5.503
Haili Yu,Busheng Zhang,Ruijuan Qi,Nannan Qu,Chaoliang Zhao,Yan Lei,Xiaogang Yang,Zhi Zheng
Designing lead-free inorganic perovskite or perovskite-like structure materials and researching the corresponding photoinduced charge carrier dynamics are always promising due to both the environment and power conversion efficiency considerations. In this work, we intelligently employ a bilayer metal Bi/Cu thin film with different atomic ratios as the precursor to fabricate a CuBiI4 perovskite-like film in situ with a controlled Bi gradient at room temperature. This structure can significantly affect the photoinduced charge carrier dynamics of the resulting products. Next, a series of transient surface photovoltage (TSPV) measurements are carried out to investigate the photoinduced charge carrier dynamics of such CuBiI4 and CuBiI4:organic hybrid thin films. The results reveal that the gradually decreasing Bi content from ITO to CuBiI4 can facilitate the photoinduced charge carrier transportation. Finally, a champion PCE of 1.10% is obtained for an ITO/CuBiI4:polythieno[3,4-b]-thiophene-co-benzodithiophene (PTB7)/Au solar cell device. In particular, we find an exact negative correlation of the defined parameter L (the defined value for evaluating the photoinduced charge carrier dynamics in TSPV measurements) with the corresponding PCE of various devices for the first time, which may pave a new way for evaluating the potential photoelectric and photovoltaic performances of new materials without the assembly of solar cell devices.
研究领域:
材料科学
·
光伏技术
·
凝聚态物理
·
表面科学
·
能源化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Zhiwei Wang,Hongfeng Yin,Yun Tang,Qin Hou,Chen He,Hudie Yuan
Herein, we constructed an ordered nanoporous embedding nanoparticles composite by anodic oxidation of Ti 3 SiC 2 in fluorine containing organic electrolyte. Compared to anodized Ti which resulted in TiO 2 nanotubes , the anodized Ti 3 SiC 2 (ATSC) led to the formation of nanostructured TiO 2 /C/SiO 2 composite. The morphologies of oxides in the composite also varied with different anodization parameters. The ATSC could be directly used as an electrode without further processes, which possessed a superior structure and composition with a visible-light photocurrent density of 7.56 μA cm −2 , initial reversible area capacity of 6.18 F cm −2 , which were respectively 1.32 and 6.87 times higher than those of the anodized Ti (AT), respectively. The ATSC synthesized by such a feasible fabricating strategy shows favorable photoelectrochemical properties and remarkable stability, and may broaden the bifunctional material prospects of anodized MAX phases.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 29
·11065-11072
·
IF 0
Qian Zhang,Ying Zhou,Fang Wang,Fan Dong,Wei Li,Haimin Li,Greta R. Patzke
Elemental photocatalysts have recently been proposed as interesting materials to be used as alternatives to conventional semiconductor compounds. In this study, we demonstrate that not only elements with semiconducting properties are photocatalytically active by introducing semimetallic bismuth for the photooxidation of NO. Black Bi films were prepared via an electrochemical deposition approach. Both density functional theory (DFT) calculations and temperature dependence electrical resistivity measurements pointed out that the obtained films exhibited semimetallic behavior. The Bi films were easily oxidized upon exposure to air. However, electrochemical reduction of the surface amorphous oxide layer led to a more than 4-fold enhancement of the photocurrent density of the Bi films. The detection of hydroxyl radicals with electron spin resonance (ESR) investigations further confirmed the photogeneration of electrons and holes. A 37.7% removal ratio of NO over Bi films was observed under UV light irradiation with no significant reduction of photocatalytic activity after five cycles. Given that the conduction and valence bands of semimetallic Bi overlap, the associated excitation processes are more complex in comparison with semiconductor photocatalysts, thereby indicating a different photocatalytic mechanism. The present study points out new directions for developing semimetallic photocatalysts.
研究领域:
材料科学
·
环境催化
·
物理化学
·
表面科学
·
无机功能材料
✓ 已验证
DOI
Small
·
2022
·Vol. 19
·期 2
·2205353
·
IF 15.153
Fapeng Sun,Wenting Hong,Xu He,Chuanyong Jian,Qiankun Ju,Qian Cai,Wei Liu
β-Ag 2 Te has attracted considerable attention in the application of electronics and optoelectronics due to its narrow bandgap, high mobility, and topological insulator properties. However, it remains a significant challenge to synthesize 2D Ag 2 Te because of the non-layered structure of Ag 2 Te. Herein, the synthesis of large-size, ultrathin single crystal topological insulator 2D Ag 2 Te via the van der Waals epitaxial method for the first time is reported. The 2D Ag 2 Te crystal exhibits p-type conduction behavior with high carrier mobility of 3336 cm 2 V −1 s −1 at room temperature. Taking advantage of the high mobility and perfect electron structure of Ag 2 Te, the Ag 2 Te/WSe 2 heterojunctions are fabricated via mechanical stacking and show an ultrahigh rectification ratio of 2 × 10 5 . Ag 2 Te/WSe 2 photodetector also exhibits self-driven properties with a fast response speed (40 µs/60 µs) in the near-infrared region. High responsivity (219 mA W −1 ) and light ON/OFF ratio of 6 × 10 5 are obtained under the photovoltaic mode. The overall performance of the Ag 2 Te/WSe 2 photodetector is significantly competitive among all reported 2D photodetectors. These results indicate that 2D Ag 2 Te is a promising candidate for future electronic and optoelectronic applications.
研究领域:
凝聚态物理
·
材料科学
·
纳米电子学
·
光电子学
·
半导体器件
·
二维材料科学
✓ 已验证
DOI
高影响因子
CURRENT APPLIED PHYSICS
·
2023
·
IF 2.4
WenXin Zhang,Hao Li,Haofei Cong,Ruifu Zhou,Yuanbin Qin,Peilong Xu,Xuhai Liu,Fengyun Wang
One-dimensional wide band-gap metal oxide semiconductors demonstrate enormous potential in high-performance ultraviolet photodetectors. Here, via tuned zinc oxide (ZnO) concentration ratio and heterojunction structure as well as decent V TH value, we electrospun tin zinc oxide (SnZnO X ) nanowires for photoelectronic conversion function. The constructed optimized photodetectors based on Sn 8 Zn 2 O X nanowires can exhibit a remarkable detectivity of 1.77 × 10 16 Jones, excellent responsivity of 2.23 × 10 3 A/W and relative high sensitivity over 10 4 . In addition to the excellent photodetection performance, Sn 8 Zn 2 O X nanowire devices exhibit nonvolatile memory effect , which can maintain the light-induced low resistance state at 5 V without light. Moreover, a voltage of 30 V was applied to Sn 8 Zn 2 O X nanowires devices to realize light-writing state switching to bias-erasing state, and the device could come back to their initial high resistance state. These results indicate SnZnO X nanowires devices possess a tremendous potential in the circuit design of the artificial visual system.
研究领域:
材料科学
·
纳米电子学
·
光电子学
·
半导体器件
·
人工视觉系统
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）