JOURNAL OF ALLOYS AND COMPOUNDS
·
2014
·
IF 2.726
Pin Lv,Wuyou Fu,Yannan Mu,Hairui Sun,Shi Su,Yanli Chen,Huizhen Yao,Dong Ding,Tie Liu,Jun Wang,Haibin Yang
TiO 2 film materials have very wide applications in photovoltaic conversion techniques. And, TiO 2 nanotubes array film with nanowires directly formed on top (denoted as TiO 2 NTWs) was prepared by the anodization method. CdS and PbS quantum dots (QDs) were firstly cosensitized on the TiO 2 NTWs array (denoted as (CdS + PbS)/TiO 2 NTWs) by novel successive ionic layer adsorption and reaction (N-SILAR), which only needed a cation mixed solution containing Cd 2+ and Pb 2+ and an anionic solution containing S 2− . This N-SILAR method can not only effectively shorten the experimental time, simplify the experiment procedure and reduce the experiment cost, but also make the material of (CdS + PbS)/TiO 2 NTWs possess the advantages of improving electron transport and reducing chemical erosion. Moreover, the photocurrent of (CdS + PbS)/TiO 2 NTWs was 4.1 mA/cm 2 under an illumination of 100 mW/cm 2 . The most eye-popping part was that the result was 8 times higher than that of the bare TiO 2 NTWs array. The result of photoelectrochemical measurements indicated that this novel material had a potential application in photovoltaic devices.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Yuli Xiong,Lin Yang,Huichao He,Jing Wan,Peng Xiao,Wenlong Guo
The successive ionic layer absorption and reaction (SILAR) method has been successfully used for the thin film preparation of metal oxides. In this work, we firstly fabricate the hybrid Bi 2 MoO 6 @Bi 2 Mo 2 O 9 photoanode by a one-step SILAR method. The optimized Bi 2 MoO 6 @Bi 2 Mo 2 O 9 demonstrates a photocurrent about 0.160 mA cm −2 at 1.23 V vs. RHE, which is 3.6 and 8.0 times enhancement compared with pristine Bi 2 MoO 6 and Bi 2 Mo 2 O 9 for water oxidation . The enhanced efficiencies of charge separation and oxidation kinetics by Bi 2 MoO 6 @Bi 2 Mo 2 O 9 are 20.5% and 54.6% at 1.23 V vs. RHE, which is higher than Bi 2 Mo 2 O 9 (9.2% and 15.4%) and Bi 2 MoO 6 (10.7% and 29.2%). Moreover, the electron transport time of Bi 2 MoO 6 @Bi 2 Mo 2 O 9 is 0.038 ms at 300 W m −2 through the controlled intensity modulated photocurrent spectrometer analysis, which is lower than Bi 2 Mo 2 O 9 (0.087 ms) and Bi 2 MoO 6 (0.052 ms). The enhanced photoelectrochemical activities of Bi 2 MoO 6 @Bi 2 Mo 2 O 9 can be attributed to the matched energy band between Bi 2 Mo 2 O 9 and Bi 2 MoO 6 , which could not only improve the charge separation, but also accelerate the charge migration. Therefore, our research indicates an effective technique for fabricating Bi 2 MoO 6 @Bi 2 Mo 2 O 9 by one step process, and thus may provide a new idea for the preparation of other hybrid ternary metal oxides.
研究领域:
材料科学
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2019
·Vol. 19
·期 6
·3437-3446
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IF 1.093
Niu Yakun,Zhou Yi,Niu Ping,Shen Haiyan,Ma Ying
Ti doped hematite photoanodes have been intensively investigated due to their excellent activity for photoelectrochemical water oxidation. However, little attention has been paid to the doping effect on the photocurrent onset potential of hematite and the underlying mechanism. In this
paper, Ti doped hematite nanorod arrays were successfully prepared through a facile treatment of hematite with TiCl3 solution. The photocurrent of the Ti doped hematite photoanode increases by three times, and its onset potential shifts more positively as compared with that of the
undoped one. Electrochemical analyses were employed to unravel the mechanism of anodic shift of the onset potential. Cyclic voltammograms and electrochemical impedance spectra confirmed that more surface states were formed in Ti doped hematite than the undoped one. As a result, lower activity
towards oxygen evolution reaction (OER) and increased electron–hole recombination after light on/off in low potential region were observed in Ti doped hematite. It is concluded that these doping induced surface states may be a hindrance to charge transfer and the onset potential of Ti
doped hematite shifts anodically.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Nan Ma,Ya Yang
Research of photovoltaic effect has been increased based on ferroelectric materials , generating a series of important discoveries. However, the conventional ferroelectric ceramics usually have low photocurrent values. How to increase the photocurrent of ceramics becomes an important issue to push forward the practical application of these devices. Here, we report the intrinsic properties about the temperature dependence of photocurrent and its relationship with the ferroelectric polarization. The photocurrent of BaTiO 3 ceramics strongly depends on the temperature, which can achieve an enhancement of 121.9～179.6% at low temperature (80–240 K) as compared with that at room temperature. The enhancement of photocurrent is associated with ferro-pyro-phototronic effect, evidencing by the enhanced ferroelectric polarization and the activation of shallow trap levels at low temperature, which can be used for detecting 405 nm light under low temperature. This research provides a potential approach to boost the photocurrent of ferroelectric ceramics and enable the development of a wide range of optoelectronic devices.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 5
·2729-2735
·
IF 4.036
Jie Zhang,Jiaojiao Liu
In this study, CsPbBr3 particles were prepared by a simple solvent evaporation method in ambient environment; the p–n heterojunction formed by CsPbBr3 particles on the surface of a single long Te wire was used to construct a high-performance Te/CsPbBr3 photodetector. Compared with CsPbBr3 PDs, the Te/CsPbBr3 photodetector showed improved photocurrent, and exhibited characteristics of excellent self-powered performance, broad-spectrum response (UV-visible), and ultra-fast response speed (trise = 0.09 ms). In addition, under zero bias and upon 540 nm light irradiation, the device had good responsivity (0.35 mA W−1), high photosensitivity (up to 100 on/off ratio), and a detectivity of 1.42 × 1010 Jones. This study provides insight into the possibility of manufacturing high-performance self-powered photodetectors through a simple in situ construction of heterojunctions.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
PubMed
高影响因子
CURRENT APPLIED PHYSICS
·
2025
·
IF 3.1
Yanshu Shi,Mengke Guo,Yiqian Wang,Xuekun Wang,Jile Wang,Xiaoyun Qin,Yumin Song,Hai Wang,Xiaoyan Wang,Tingting Guo
With the rising demand for high-performance organic small-molecule semiconductor materials in optoelectronic devices, reconstructing specific morphologies of nano-phthalocyanines is of great significance. Herein, TiOPc ultrathin nanosheets (UNSs) and nanosheets (NSs) are reconstructed using a simple and effective physical vapor deposition (PVD) method. The thickness and lateral sizes of the UNSs are between 1 to 10 nm and 50–200 nm, respectively. The subsequent experimental results of photodetection exhibited that the photocurrent of UNSs/NSs is nearly four to five orders of magnitude higher than that of the raw materials at 10 V and show good stability. The photoresponsivity of the UNSs is about 3.37 × 10 4 times that of the raw materials, demonstrating good photoelectric conversion capability. Under different wavelengths, the photocurrents of the UNSs are consistently higher than those of the NSs and the raw materials. The NSs exhibit the fastest response speed, with rise and fall times of 194 ms and 193 ms, respectively, under 395 nm. Furthermore, the photoresponsive properties of the reconstructed UNSs and NSs are better than those of most other reported MPc materials. Our results indicate that TiOPc UNSs and NSs hold great application prospects in high-performance optoelectronic devices.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2023
·
IF 4.7
Yuan Liu,Yun Ji,Peng Wang,Xiao Wu,Ya Yang
The photocurrent produced by the synergy of pyroelectric and photovoltaic effects in ferroelectric materials exhibits great potential for photodetection. Photocurrent generated by various ferroelectric materials exhibits a different behavior with the ambient circumstance especially the temperature, making it a long-term topic. Here, we report a remarkable promotion in the photocurrent of a photoelectric device based on ferroelectric (K0.5Na0.5)(Nb0.94Sb0.06)O3-Bi(Ni0.33Nb0.67)O3 (KNNS-BNN) materials via temperature modulation. When compared with the photocurrents obtained at room temperature, by lowering the atmospheric temperature to 14.8 °C, the peak photocurrent is increased by 219%, and by raising the temperature to 46 °C, the platform photocurrent is improved by 69.9%. The enhanced photocurrents are mainly ascribed to temperature-controlled conductivity and energy band structure of the KNNS-BNN materials. Working as a self-powered photodetector, the responsivity of the device reaches 4.01 × 10–6 A W–1. This work provides new possibilities for high-performance ferroelectric photodetectors.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 24
·12845-12851
·
IF 7.443
Ling Lin,Gui-Qi Gao,Qing Zhu,An-Wu Xu
Plasmon hot electron injection enhanced photocurrent has potential applications in light harvesting in photovoltaic devices. We demonstrate a cathodic photocurrent enhancement system utilizing strongly coupled Ag@perylene (Ag@Pe) core–shell nanowires, and the perylene shell thickness can be readily controlled. The strong coupling between the plasmonic resonance and molecular exciton resonance is evidenced by the substantial plasmon damping of Ag NWs and the enhancement of fluorescence of perylene with a red shift in Ag@Pe samples. The photocurrent of the Ag@Pe sample with a shell thickness of 5.8 nm (Ag@Pe-5.8 nm) shows a 16-fold enhancement compared to that of perylene. While, a simply mixed Ag–perylene sample displays only a 6-fold enhancement in photocurrent, indicating that the strong coupling in the Ag@Pe system plays a major role in the enhancement of photocurrent through hot electron transfer from the silver nanowires to perylene molecules. This strongly coupled Ag@Pe hetero-nanostructure could find potential applications in surface plasmon-driven, hot-electron solar cells and surface catalytic reactions.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2017
·
IF 12.343
Lin Yang,Yuli Xiong,Wenlong Guo,Ming Zhou,Kena Song,Peng Xiao,Guozhong Cao
Manipulation the charge transport and energy band of a semiconductor is always an important theme for photoelectrochemistry. Here we design and fabricate a ferroelectric-semiconductor hybrid structure for photoelectrochemical applications. By selecting the appropriate poled bias, the polarization direction of ferroelectric could be conveniently manipulated for n-type semiconductors (TiO 2 and ZnO) and p-type semiconductors (g-C 3 N 4 and Bi 2 Mo 2 O 9 ). The photocurrents of the hybrid photoanodes (at 1.23 V vs. RHE) and photocathodes (at 0 V vs. RHE) enhanced by 60 ± 5% and 85 ± 15% with water oxidation and reduction respectively under the illumination of a monochromater ( λ = 365 nm). Further, the efficiency of oxidation kinetics for hybrid photoanodes increased by 1.5 fold, and the charge transport time reduced 10–15%. The polarized ferroelectric blended in semiconductor may have an effect on the space charge region of the semiconductors, further, bending the energy band and accelerating the charge transport at the photoelectrode surface. This research has a certain reference for developing hybrid photoelectrodes relevant to the large-scale application of ferroelectric materials in solar water splitting, photovoltaic , and solar fuels devices.
研究领域:
材料科学
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光电化学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2019
·
IF 4.018
Kun Xu,Lei Zhang
The interactions between molecules and halide perovskite surfaces are important for halide perovskite-based optoelectronic and energy conversion systems. In this manuscript, we investigate the interactions between N3 dye, a famous dye widely employed for dye-sensitized solar cells, and halide perovskite CH 3 NH 3 PbI 3 surface, employing combined experimental and first principles techniques. We find that the interactions between the N3 dye and CH 3 NH 3 PbI 3 are synergistic for the photocurrent generation from the resulting molecule/perovskite photoanode in aqueous solution. The photocurrent values significantly increase by orders of magnitude for the hybrid N3/CH 3 NH 3 PbI 3 system compared with those of the individual components under visible light. The first principles calculations reveal the detailed structural, electronic and optical properties of the N3/CH 3 NH 3 PbI 3 hybrid systems. This study facilitates the fundamental understanding of the interactions between dye molecules and halide perovskite materials, and benefits the design of surface engineered halide perovskite materials for optoelectronic and energy conversion applications.
研究领域:
材料科学
·
光电转换
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Guang Yang,Hao Zhang,Mingyu Dou,Hua Yang,Xingliang Yin,Dacheng Li,Haitao Zhao,Jianmin Dou
To enhance the photocatalytic activity, loading proper semiconductor with high efficiency and low cost is one of the most valid approaches. Herein, various amounts of CoWO 4 as a novel metal-free material were loaded on Mn 0.47 Cd 0.53 S (MCS) nanorods for photocatalytic hydrogen production reaction. The CoWO 4 /Mn 0.47 Cd 0.53 S-25 (CW/MCS-25) exhibits the highest hydrogen production rate of 41.53 mmol·h −1 ·g −1 in the Na 2 S/Na 2 SO 3 system, which is about 2.68 times higher than that of pristine MCS. The Mapping and HRTEM reveals the deposited of CoWO 4 on the MCS. The detailed analyses of XPS, EIS, TRPL spectra and transient photocurrent responses indicate that CoWO 4 and MCS interacted closely and the photogenerated electrons of CoWO 4 can be transferred into MCS. In particular, the introduction of CoWO 4 can further transfer the photogenerated holes of MCS, thereby inhibiting the photocorrosion of MCS and improving photocatalytic activity. This work provides a reference for the exploration of noble metal-free composite material and shows great potential in the photocatalytic application.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Ruiyang Yu,Hui Qiao,Gengcheng Liao,Zongyu Huang,Qiaoliang Bao,Xiang Qi
Here, a photoelectrochemical (PEC) photodetector with good flexibility and high photoresponsivity was successfully fabricated in a vertical structure, where the MXene (Ti2CTx) nanosheet and carbon black electrode were separated by adenosine triphosphate/nicotinamide adenine dinucleotide phosphate (ATP/NADPH)-incorporated solid-state electrolyte. The photocurrent and photoresponsivity can reach 1.84 μA/cm2 and 8.89 μA/W, respectively, under a light intensity of 90 mW/cm2 at a bias potential of 0.6 V, which are approximately 2.3 times those of Ti2CTx nanosheets. The addition of ATP and NADPH to the electrolyte also leads to a large decrease of the rise time from 0.76 to 0.26 s. Furthermore, the photodetector can continue to function and maintain stability under 45° bending and after 500 cycles of bending, indicating a robust device structure and great flexibility. The performance enhancement of the PEC photodetector can be attributed to the synergistic effect of electrolyte additives on Ti2CTx nanosheets, where ATP and NADPH greatly enhance the circulation and utilization of photogenerated carriers. This work suggests that the incorporation of chloroplast-inspired carrier circulation with two-dimensional nanosheets could achieve efficient light-current conversion, providing a new strategy to improve the performance of PEC-type photodetectors.
研究领域:
材料科学
·
光电器件
·
生物启发设计
✓ 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）