CHEMICAL PHYSICS LETTERS
·
2024
·
IF 2.8
Yelin Ding,Yiwei Zhao,Zhihui Deng,Kai Lian,Zhengtong Wang,Xiaohui Liu,Chun Sun
Halide perovskites have attracted widespread attention in the fields of photovoltaics, LEDs, lasers, and photocatalysis due to their unique optoelectronic properties. Here, we proposed a method to synthesize CsPbBr 3 /TiO 2 composite material by embedding precursors into mesoporous titanium dioxide pores and inducing in-situ growth of the perovskites within the pores. Due to the encapsulation of mesoporous TiO 2 , CsPbBr 3 maintains its excellent luminescent characteristics in water, air, and at high temperatures. Furthermore, the Z-type heterojunction structure formed between mesoporous TiO 2 and internal CsPbBr 3 significantly enhances the photo-generated current, and the response time has increased by 1.7 times.
研究领域:
材料科学
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光催化
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光电探测器
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光电
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 28
·16059-16067
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IF 4.22
Li Huafeng,Li Jing,Bao Yanan,Li Jianliang,He Chengyu,Wang Hengshan,Zhang Yajing,Tang Huayi,Xu Jiao,Fang Yurui,Liang Shuang,Yang Yiming
All-inorganic halide perovskite nanowires (NWs) are promising materials due to they have broad application prospects in the field of optoelectronics, with mixed-halide perovskite nanowires can change the optoelectronic properties by adjusting the halide ratio. Here, we experimentally investigated the two-process governed anion-exchange reaction in single-crystalline CsPbX 3 micro- and nanowires. The critical parameters affecting the outcome of the reaction are identified as the reaction temperature, reaction time, and precursor concentrations. Upon examining the photoluminescence and morphology of the NWs, high-quality NWs were obtained by optimizing these critical parameters. The bandgap of the NWs can be tuned over the entire visible spectra (430–700 nm). In addition, photodetectors incorporating single NWs were fabricated, which demonstrated excellent responsivity under illumination. Our results expand the validity of liquid-phase anion exchange to the microscale, and lay the basis for liquid-processed optoelectronics and displays.
研究领域:
材料科学
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光电
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纳米技术
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光子学
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DOI
高影响因子
DYES AND PIGMENTS
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2020
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IF 4.613
Yuxiao Chen,Lei Zhang,Juhong Miao,Jingfa Li
Dye-sensitized halide perovskite systems have recently been demonstrated as promising candidates for photoelectrochemical devices. In this manuscript, we focus on the calcein dye-sensitized halide perovskite systems for aqueous-based photoelectrochemical system. This is achieved via the deposition of the commercially available self-assembled dye layer at the CH 3 NH 3 PbI 3 /TiO 2 interface. Enhanced optoelectronic properties are obtained when the calcein dye is incorporated in the perovskite-based material. The photoelectrode consisting of the calcein/CH 3 NH 3 PbI 3 hybrid film produces a photocurrent value that is orders of magnitude higher than that from a bare CH 3 NH 3 PbI 3 photoelectrode under the same condition. In addition, the calcein dye improves the light-emitting properties of the CH 3 NH 3 PbI 3 -based photoelectrode in water. The first-principles calculations suggest that multiple Lewis-acid-base coordination sites are available between the calcein dye and the halide perovskite substrate, such that the calcein dye could simultaneously enhance the light harvesting properties and passivates the perovskite electrode. This manuscript highlights the potentials of the multifunctional dye-sensitized halide perovskite materials, and facilitates the convergent understanding of halide perovskite materials for integrated optoelectronic devices.
研究领域:
材料科学
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化学
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DOI
高影响因子
ACS Nano
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2020
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IF 14.588
Qiaoyan Hao,Jidong Liu,Gang Wang,Jiewei Chen,Haibo Gan,Jiaqi Zhu,Yuxuan Ke,Yang Chai,Junhao Lin,Wenjing Zhang
Indium selenide (InSe) has become a research hotspot because of its favorable carrier mobility and thickness-tunable band gap, showing great application potential in high-performance optoelectronic devices. The trend of miniaturization in optoelectronics has forced the feature sizes of the electronic components to shrink accordingly. Therefore, atomically thin InSe crystals may play an important role in future optoelectronics. Given the instability and ultralow photoluminescent (PL) emission of mechanically exfoliated ultrathin InSe, synthesis of highly stable mono- and few-layer InSe nanosheets with high PL efficiency has become crucial. Herein, ultrathin InSe nanosheets were prepared via thermal annealing of electrochemically intercalated products from bulk InSe. The size and yield of the as-prepared nanosheets were up to ∼160 μm and ∼70%, respectively, and ∼80% of the nanosheets were less than five layer. Impressively, the as-prepared nanosheets showed greatly enhanced stability and PL emission because of surface modification by carbon species. Efficient photoresponsivity of 2 A/W was achieved in the as-prepared nanosheet-based devices. These nanosheets were further assembled into large-area thin films with photoresponsivity of 16 A/W and an average Hall mobility of about 5 cm2 V–1 s–1. Finally, one-dimensional (1D) InSe nanoscrolls with a length up to 90 μm were constructed by solvent-assisted self-assembly of the exfoliated nanosheets.
研究领域:
材料科学
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纳米技术
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光电
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半导体物理
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Youxu Yu,Yuxin Liu,Zhefei Pan,Liang An,Rong Chen
The performance of a dual-photoelectrode photoelectrochemical cell highly depends on cell configuration. Conventional opposite configuration usually requires bilateral illumination at both the photoelectrodes, while the parallel configuration has a large mass transfer resistance between the two ends of the photoelectrodes. Herein, a dual-photoelectrode photoelectrochemical cell with an opposite configuration is developed, in which a high-transmittance mesoporous TiO 2 photoanode and an air-breathing Cu 2 O-CuO nanowires photocathode are adopted. The mesoporous TiO 2 photoanode can absorb incident UV light for photoanodic reactions, and its high transmittance allows for substantial visible light to pass through the photoanode to illuminate the photocathode for reduction reactions. This design not only enables unilateral illumination to the photoelectrochemical cell with an opposite configuration and spectral splitting of sunlight utilization but also enhances light harvesting. Due to these merits, the dual-photoelectrode photoelectrochemical cell with a mesoporous TiO 2 photoanode exhibits an increase in the short current density by 78.6 % and an increase in the maximum power density by 8.1 % compared to the one with the nanoparticles-packed TiO 2 photoanode.
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DOI
高影响因子
NANOTECHNOLOGY
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2022
·Vol. 34
·期 2
·025202
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IF 3.953
Jun Zhu,Hongyan Chen,You Zi,Mengke Wang,Weichun Huang
Although black phosphorus analogue, bismuthene, has been extensively investigated in recent years, yet the investigation into the photoelectronic devices is still in its infancy. In this contribution, uniform zero-dimensional (0D) bismuth (Bi) quantum dots (QDs) with different sizes were successfully synthesized by a simple solvothermal method. The as-synthesized 0D Bi QDs serve as working electrode materials by a direct deposition for photoelectrochemical (PEC)-type photodetection. The PEC results demonstrate that the as-fabricated 0D Bi QD-based electrode not only possess suitable self-powered broadband photoresponse, but also displays excellent photodetection performance. Under simulated light, the photocurrent density and photoresponsivity of the as-fabricated 0D Bi QD-based electrode can reach 2690 nA cm−2, and 22.0 μA W−1, respectively. In addition, the as-prepared Bi QDs with the average diameter of 17 nm exhibit the best PEC photoresponse behavior in the studied size range of Bi QDs, mainly ascribed to the synergistic effect of suitable band gap and accessible active sites. It is anticipated that the uniform Bi QDs can be served as building blocks for a variety of photoelectronic devices, further expanding the application prospects of bismuthene, and can provide in-depth acknowledge on the performance optimization of monoelement Bi-based optical devices.
研究领域:
材料科学
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纳米技术
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光电子学
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2019
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IF 8.456
Jun Wang,Yining Pan,Liangxing Jiang,Min Liu,Fangyang Liu,Ming Jia,Jie Li,Yanqing Lai
Copper ions are not only physiologically essential for life but also hazardous materials causing a series of neurodegenerative diseases. Photoelectrochemical (PEC) detection has attracted a large amount of focus as a potential strategy to develop Cu2+ ion sensors. However, relatively low photocurrent signals with poor antidisturbance ability and the limited concentration range have prevented its practical applications. Here, we designed a WO3/CdS heterojunction photoanode for the PEC determination of Cu2+ in aqueous solution through a simple two-step chemical bath deposition method. The obtained WO3/CdS photoanode had a nanoplate morphology and showed an enhanced photoresponsivity with a photocurrent density of 1.5 mA/cm2 at 1.23 V versus RHE under illumination. Naturally, it exhibited a low detection limit (0.06 μM) and wider range (0.5 μM to 1 mM) for Cu2+ PEC detection first, suggesting that the WO3/CdS heterojunction photoanode is a promising tool to monitor copper pollution in natural environments.
研究领域:
环境科学
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分析化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
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2017
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IF 2.986
Jimin Du,Mengke Yang,Fangfang Zhang,Xuechun Cheng,Haoran Wu,Huichuang Qin,Qingsong Jian,Xialing Lin,Kaidi Li,Dae Joon Kang
Photoelectrochemical (PEC) water splitting using high-performance catalysts shows considerable promise in generating environment-friendly hydrogen energy. Its practical applications, however, suffer from several shortcomings, such as low photocurrent density, large onset-voltage value, and poor durability. In this study, CuS and CdS quantum-dot-cosensitized porous TiO 2 -based PEC catalysts (CuS-CT) have been successfully synthesized via in situ sulfuration of CuO and CdO coexisting inside a porous TiO 2 monolith by a hydrothermal method . Compared to porous TiO 2 , CuS-sensitized porous TiO 2 (CuS-TiO 2 ), and CdS-sensitized porous TiO 2 (CdS-TiO 2 ) in terms of PEC performance, the CuS-CT photoanode exhibited a significantly high anodic photocurrent for water splitting under simulated sunlight radiation. The photocurrent produced by the optimized sample of 7% CuS-5% CdS-TiO 2 (7% CuS-CT) was nearly 2.7 times higher than that of pure porous TiO 2 at 1.0 V versus a reversible hydrogen electrode (RHE). Porous TiO 2 possesses large surface areas that can drive fast electrolyte transport and afford more surface reaction active sites. On the other hand, CuS and CdS quantum dots not only broaden the visible light absorption range, but also improve photoinduced electron-hole separation efficiency. The co-sensitized multi-nanostructures photoanodes lead to a remarkable and promising application in PEC water splitting reactions.
研究领域:
材料科学
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光化学
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能源材料
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Heliyon
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2024
·
IF 3.4
Chenhan Lv,Haixiang Cheng,Rui Fan,Jingyu Sun,Xinghai Liu,Yinghui Ji
Organic fluorine compounds are acute carcinogenic and mutagenic to humans. Photoelectrocatalysis (PEC) treatment is an innovative technology in the field of the removal of fluorine compounds, and thus current research focused on improving stability and catalytic ability of photoanode. In this study, it has been synthesized a rGO/BiOI photocathode for the efficient degradation of 4-Fluoroaniline (4-FA). The physical characterization and photoelectrochemical properties of the photocathode was determined. The results indicate that the PEC treatment with the rGO/BiOI photocathode was more efficient compared with individual processes. During the optimization experiments, the PEC treatment achieved 99.58 % and 72.12 % of 4-FA degradation and defluorination within 1 h. Cyclic stability experiments show that rGO/BiOI photocathode was efficient and stable, which reached 96.91 % and 67.64 % of 4-FA degradation and defluorination after five cycles. Mechanism analysis indicates that the PEC process was based on an electrochemical reaction and photo-induced processes. The degradation product of 4-FA was mainly 2,4-di-t-butylphenol, and trapping experiments indicates that h + is the primary oxidizing species. Therefore, PEC treatment with rGO/BiOI photocathode is a competitive green approach to remove fluorine compounds pollutants and brings new insights into development of PEC treatment.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Physical Chemistry Letters
·
2024
·
IF 4.8
Hongyan Yin,Can Zhang,Quanzhen Zhang,Pu Wang,Jianguo Tang,Sui Mao
Metallic nanoparticles can generate photoexcited hot carriers on the femtosecond scale under light excitation, which holds immense significance for applications such as optical communication and ultrafast imaging. In this study, a tunnelling junction structure with ZrO2 as the dielectric layer is designed and fabricated to achieve efficient hot hole collection between Au nanoparticles and P-type Si. Through characterizations of photoconductive atomic force microscopy, the electrical transition from an ohmic contact to a tunneling junction is confirmed, and the transfer pathway of Au hot holes to P-type Si upon 520 nm excitation is clearly observed. The impact of the tunneling structure on device performance is investigated through the fabrication of Si/ZrO2/Au/TiO2 photodiodes. The performance tests show that hot hole collection by the tunneling effect significantly enhances a range of parameters, e.g., external quantum efficiency by 250%. Noticeably, the external quantum efficiency attributed to photogenerated hot carriers under 520 nm excitation is estimated to exceed 2.5%. Moreover, the transient photoresponse of the photodiodes is examined with a typical rising time of less than 20 ns.
研究领域:
光电子学
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纳米光子学
·
固态物理
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材料科学
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半导体器件
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Ning Wang,Yaping Zhang,Xingcheng Xu,Mengke An,Jijiao Gu,Wei Song,Jun Wan,Lei Wang
Modulation of two-dimensional (2D) morphology structure is an effective strategy to improve the electron transport properties of BiVO 4 photoanodes. However, up to now, the application of 2D BiVO 4 in photoelectrochemical water splitting has been extremely scarce reported. Here, a simple method to prepare nanoplate BiVO 4 photoanodes is reported. Mo-BiVO 4 nanoplates were grafted on the conventional BiVO 4 particles by the mild method. Due to the special structure, the specific surface area of the photoanode is increased, which enhances the light absorption and utilization efficiency. Moreover, the homojunction formed between BiVO 4 substrate and Mo-doped BiVO 4 nanoplate promotes the separation of photogenerated carriers and the transfer of photogenerated holes to the electrolyte interface. The abundant specific surface area also provides more support for the co-catalyst. As a result, under multiple facilitation, the photocurrent density of the BiVO 4 /Mo-BiVO 4 /CoPi photoanode is enhanced to 5.1 mA/cm 2 at 1.23 V vs. RHE.
研究领域:
材料科学
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光化学
·
能源材料
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
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2018
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IF 3.767
Han-Xuan Ji,Zu-Sheng Huang,Lingyun Wang,Derong Cao
Three novel metal-free organic dyes IT , IPT and IQT , containing a dipentyldithieno[3,2- f :2′,3′- h ]quinoxaline ( DPQ ) unit as the π-bridge were synthesized and the impacts of the auxiliary acceptors on the photovoltaic performances were studied. IQT with 2,3-dipentylquinoxaline as the auxiliary acceptor exhibited the highest efficiency of 7.98%, with a short-circuit photocurrent density of 16.87 mA cm −2 , an open-circuit photovoltage of 0.71 V, and a fill factor of 0.67, under standard global AM 1.5G solar light condition. IPT with the strongest electron-withdrawing group (2,3-dipentylpyridopyrazine) as the auxiliary acceptor could red-shift the absorption range, but showed the weakest performance, which might be due to the electron trap of the 2,3-dipentylpyridopyrazine unit. The results show that incorporating auxiliary acceptor with moderate electron-deficient ability can extend the absorption range and adjust the molecular orbital energy levels, improving the photovoltaic performance.
研究领域:
材料科学
·
能源研究
✓ 已验证
DOI
高影响因子
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