Journal of Energy Chemistry
·
2025
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IF 14.9
Xiaozhen Huang,Zilong Zhang,Yuheng Li,Liangliang Zhang,Can Wang,Lusheng Liang,Chi Li,Chunming Liu,Zhehong Zhou,Ruidan Zhang,Yue Wang,Mingwei An,Yang Wang,Peng Gao
Exploring multifunctional interfacial modifiers is an effective approach to addressing interface issues in perovskite solar cells (PSCs) and improving device performance and stability. While most interfacial modifiers focus on passivating defects at the interfaces, there has been limited investigation into the relationship between molecular design and interfacial charge dynamics. This work introduces resonance molecules with a push-pull effect for interfacial modification, allowing for synergistic regulation of passivation effects and charge dynamics. Specifically, FCz-PO, which includes an electron-withdrawing fluorine atom, exhibits superior passivation but poor molecular stacking and charge extraction. In contrast, MCz-PO, featuring an electron-donating methoxy group, provides effective passivation, well-ordered molecular packing, and efficient charge extraction and transport. Consequently, PSCs using MCz-PO achieve high power conversion efficiency (PCE) of 24.74% and excellent operational stability. This study suggests that resonance structures can be an effective molecular design strategy for developing interfacial modifiers with both strong passivation capabilities and well-regulated charge dynamics.
研究领域:
材料科学
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光伏技术
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化学工程
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 12
·126505
·
IF 4.386
Yaqi Liu,Kaidong Zhan,Zhili Shi,Wenjing Lv,Pujia Cheng,Xuecheng Ren,Fan Wu
CuO nanoarrays were synthesized by using a hydrothermal method, and TiO2 nanocrystals were deposited on the surface of CuO nanoarrays to form bulk heterostructure photoelectrodes. The current-time curve revealed that TiO2 nanocrystals can enhance the photocurrent of CuO nanoarrays, resulting from the higher charge separation efficiency and transfer rate. In addition, the effects of small biases (–0.1 and 0.1 V) on the photocurrent and photogenerated charge dynamics in the aforementioned photoelectrodes were evaluated. A small bias was found to not influence the macroscopic dynamical process during charging and discharging of the CuO photoelectrode, but it was more correlated with the microscopic dynamics. Additionally, the built-in electric field in the CuO nanoarray/TiO2 heterojunction could be affected by a small external bias, thereby influencing the charge separation and charge diffusion concentration, which, subsequently, influenced the charge diffusion length, L. In contrast, L in the pristine CuO nanoarray was not improved under a small reverse bias, because the small reverse bias could not efficiently improve the diffusion concentration owing to the lack of a built-in electric field to dissociate electron-hole pairs. These kinetic mechanisms are helpful in understanding the photoelectric conversion process in heterogeneous photoelectrodes.
研究领域:
材料科学
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物理化学
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DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2021
·Vol. 127
·期 2
·1-9
·
IF 2.584
Ma Rongrong,Pathak Rajesh,Zheng Dongping,Zhang Yingjie,Xing Jie,Liu Junhong,Jiang Yuanyuan,Xiao Mingxing,Wu Fan
In this paper, a ZnO array is first prepared on the conductive glass by hydrothermal method, and then a seed layer of CuO nanoparticles is deposited on the surface of ZnO nanorods to form a core–shell ZnO/CuO nanoarray. Following, the dendritic CuO nanorods are grown on ZnO nanorods by hydrothermal method, constructing a three-dimensional ZnO/CuO nano-heterogeneous hierarchical structure array and applied in photoelectrochemical cell. Our three-dimensional ZnO/CuO nano-heterogeneous hierarchical structure shows obvious absorption of visible light from 500 to 900 nm. The current–time curves reveal that the photocurrent is greatly enhanced after dendritic CuO grows on the ZnO nanorod array. Furthermore, the charge dynamics processes in the core–shell ZnO/CuO nano-heterostructure array and the three-dimensional ZnO/CuO nano-heterostructure array are studied by comparing electrochemical impedance spectroscopy and intensity modulation photocurrent (photovoltage) spectroscopy. Although the photo-generated charge transfer rate in the ZnO/CuO core–shell structure is slightly faster than the three-dimensional ZnO/CuO hierarchical structure, the recombination life of the photo-generated charge is increased by nearly two orders of magnitude in the three-dimensional ZnO/CuO nano-heterostructure array. The three-dimensional ZnO/CuO nano-heterostructure array has a good potential application in the field of photoelectric conversion devices and photocatalysis.
研究领域:
材料科学
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光电化学
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DOI
高影响因子
Nano Research
·
2021
·Vol. 15
·期 4
·2928-2934
·
IF 8.897
Xiao Xudong,Lin Siying,Zhang Liping,Meng Huiyuan,Zhou Jing,Li Qi,Liu Jianan,Qiao Panzhe,Jiang Baojiang,Fu Honggang
The formation of chemical bonds between metal ions and their supports is an effective strategy to achieve good catalytic activity. However, both the synthesis of active metal species on a support and control of their coordination environment are still challenging. Here, we show the use of an organic compound to produce tubular carbon nitride (TCN) as a support for Pd nanoparticles (NPs), creating a composite material (NP-Pd-TCN). It was found that Pd ions preferentially bind with the electron-rich N atoms of TCN, leading to strong metal-support interactions that benefit charge transfer from g-C 3 N 4 to Pd. X-ray absorption spectroscopy further revealed that the metal-support interactions resulted in the formation of Pd-N bonds, which are responsible for the improvement in the charge dynamics as evidenced by the results from various techniques including photoluminescence (PL) spectroscopy, photocurrent measurements, and electrochemical impedance spectroscopy (EIS). Owing to the good dynamical properties, NP-Pd-TCN was used for photocatalytic hydrogen evolution under visible-light irradiation ( λ > 420 nm) and an excellent evolution rate of ∼ 381 µmol·h −1 (0.02 g of the photocatalyst) was attained. This work aims to promote a strategy to synthesize efficient photocatalysts for hydrogen production by controllably introducing metal nanoparticles on a support and in the meantime forming chemical bonds to achieve intimate metal-support contact.
研究领域:
材料科学
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化学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2019
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IF 7.65
Jun Wan,Yue Zhang,Ruimiao Wang,Lin Liu,Enzhou Liu,Jun Fan,Feng Fu
Developing and designing a rational heterojunction with efficient charge kinetics properties have been a research hotspot for improving photocatalytic performance. Herein, a surface plasmons coupled two-dimensional chemical Au/Bi 2 WO 6 -MoS 2 heterojunction was synthesized. In thus a system, Au nanoparticles are tightly attached to the sides of Bi 2 WO 6 nanosheets , conducting a HEI effect with additional visible light response to inject “hot electrons” into Bi 2 WO 6 , resulting in additional charge generation. Meanwhile, few-layer MoS 2 nanosheets were chemically assembled onto ultrathin Bi 2 WO 6 nanosheets via interfacial S O bonds to form a intimate 2D-2D nanojunction, the separated and injected electrons on the surface of Bi 2 WO 6 were further directional transfer to MoS 2 nanosheets through S O bonds for detoxification of heavy metal ions Cr(VI), and the corresponding holes left on Bi 2 WO 6 nanosheets were applied for simultaneous degradation of tetracycline antibiotic. The photocatalytic detoxification activity of Au/Bi 2 WO 6 -MoS 2 was nearly 4.84, 3.47 and 1.90 times higher than that of pristine Bi 2 WO 6 , Au/Bi 2 WO 6 and Bi 2 WO 6 -MoS 2 composites, which could be ascribed to the effective charge kinetics steering and well manipulation of charge flow by virtue of the rational structural and compositional features. This work provides a new perspective for the construction of high-activity detoxification photocatalysts through steering charge kinetics.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Xin-Zheng Yue,Chuan-Qi Li,Zhong-Yi Liu,Sha-Sha Yi,De-Liang Chen,Feng Wang,Shuai-Hui Li
The constructing of functional materials with well-defined nanostructure , showing efficient charge separation and transportation properties, has been intensively and in depth investigated to fabricate catalysts for H 2 generation from solar-driven water reduction. Here we demonstrate that loading W 2 C@C structure in which each W 2 C nanoparticle (NP) is wrapped by carbon shell on surface of hollow TiO 2 microspheres (HTMs) can enhance the separation of photogenerated electron-hole pairs by building an internal electric field in W 2 C@C/HTMs composite structure and act as the reaction active sites for water reduction. As expected, the optimized W 2 C@C/HTMs construction exhibits the highest photocatalytic H 2 generation rate of 6.91 mmol h −1 g −1 under simulated solar light illumination, over 20 times larger than that of bare HTMs. The underlying mechanism has been investigated from the perspective of photochemistry and photophysics based on a series of characterization techniques, which suggests that W 2 C@C can effectively steer the charge kinetics, maximizing the charge carriers’ separation.
研究领域:
材料科学
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光催化
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纳米技术
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可再生能源
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2025
·
IF 3.6
Johar Zeb,Shuai Zhang,Muhammad Bilal Ahmed Qureshi,Manas Kumar Mandal,Qunhui Yuan,Wei Gan
Photoinduced intra and intermolecular charge transfer processes are vital in the solar energy conversion system. This research compared the photoinduced charge transfer processes of 1-aminoanthraquinone (AAQ) and 1,5-diaminoanthraquinone (DAAQ) molecules in ethanol using steady-state and transient absorption spectroscopic techniques, along with density functional theory (DFT) methods. The results revealed that AAQ shows greater intramolecular charge transfer (ICT) than the intermolecular charge transfer process. On the other hand, DAAQ, which has a lower solubility in ethanol and exhibits strong π-π stacking, displays higher intermolecular charge transfer processes than AAQ alongside its ICT process. The lifetimes for ICT and intersystem crossing (ISC) are shorter for DAAQ than AAQ molecules, representing their fast ICT and ISC processes. This work provides a comprehensive insight into the photoinduced intra- and intermolecular charge transfer processes of these two molecules, explaining their respective suitability as additives in photovoltaics and other optoelectronic devices due to their photoinduced charge transfer processes and structural planarity.
研究领域:
物理化学
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材料科学
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光化学
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
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IF 4.1
Libo Yu,Zhen Li,Weiqiang Qiao,Junke Wang,Chengshuang Zhao
Light harvesting plays crucial role for high photovoltaic performance of quantum dots sensitized solar cell (QDSSC). However, there are still issues need to be tackled, such as enlarging light response range and enhancing light scattering capability. In this work, TiO 2 eggshell hollow microspheres (EHMS) were synthesized by carbonaceous microspheres (CMS) template method and co-sensitized by CdS/CdSe/PbS quantum dots (QDs) for application in QDSSC . Compared with QDSSC based on TiO 2 nanoparticles (NP) and TiO 2 hollow microspheres (HMS), the TiO 2 EHMS based QDSSC showed a remarkable increase of short-circuit current density (J sc ) to 24.81 mA cm −2 with a power conversion efficiency (PCE) of 4.07 %. Photoelectrochemical analysis of QDSSC indicate that CdS/CdSe/PbS QDs can enlarge the light response range, and the TiO 2 EHMS improve the light scattering, leading to the improvement of light harvesting efficiency. Charges dynamics tests results proved that a larger charges recombination resistance at photoanode/electrolyte interface and longer electron lifetime can be achieved with TiO 2 EHMS, contributing to the boost of J sc . The presented study introduces a simple strategy for researchers interested in designing photoanode for various photoelectrochemical applications.
研究领域:
材料科学
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光电化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Chengwei Qiu,Zhihua Liu,Qin Rao,Hui Yang,Yuxin He,Dongmiao Li,Yuhua Zhong,Jianhan Lin,Haifeng Li,Guocheng Huang,Huaxiang Lin,Jinni Shen,Xiaoyan Zhang,Zizhong Zhang,Xuxu Wang,Xianzhi Fu
The serious combination of abundant electrons/holes in bulk primarily hinders the efficiency in the photocatalytic reaction. It is crucial to control the spatial charge dynamics through delicately designing the crystal configuration of photocatalyst. In this work, a modified tungsten trioxide nanosheet colloid (M-WO 3 ) was synthesized by an ion exchange method. Compared to pristine WO 3 (P-WO 3 ), the crystal lattice vibration frequency of M-WO 3 increases from 2.8 meV to 4.3 meV, which effectively prohibits electron–phonon coupling and powerfully accelerates the separation and transfer of photoinduced charge carriers. Irradiated by visible-light, M-WO 3 shows much higher photocatalytic bacterial inactivation performance than P-WO 3 . In addition, this regulation method increases the surface charges of the WO 3 colloid to improve its stability, which endows this colloid photocatalyst with broad prospects in practical photocatalytic antibacterial applications. This work offers guidance to construct efficiently separated photoinduced electron/hole pairs of the colloid photocatalyst by designing its crystal structure.
研究领域:
材料科学
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纳米技术
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光催化
·
细菌学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Hongqin Liu,Pengfei Tan,Yong Liu,Huanhuan Zhai,Wenna Du,Xinfeng Liu,Jun Pan
The interfacial charge dynamics was crucial for semiconductor heterostructure photocatalysis. Through the rational design of the heterostructure interface, heterojunction expressed variable recombination and migration dynamics for excited carriers. Herein, followed by a typical chemical bath strategy with the hexagonal cadmium sulfide (CdS) overlapped on the exfoliated molybdenum disulfide (MoS 2 ) film, we developed a cadmium sulfide/molybdenum disulfide (CdS-MoS 2 ) nano-heterojunction and investigated the interfacial charge dynamics for photocatalytic hydrogen evolution. Photoelectron spectroscopy detected an energetic offset between CdS and MoS 2 , revealing the formation of an interfacial electric field with efficient charges separation. Through transient absorption spectra, we demonstrated the type-II contact at the CdS-MoS 2 interface. Driven by the electric field, the excited carriers separated and rapidly migrated to sub-band defects of CdS within the first 500 fs. The carriers-restricted defects provided catalytic active sites, endowing CdS-MoS 2 a highly efficient photocatalytic capability. Consequentially, the CdS-MoS 2 achieved an enhanced hydrogen evolution rate of 2.3 mmol·g −1 ·h −1 with significantly stronger photocurrent density. This work gave an insight to the channel of interfacial separation and migration for excited carriers, which could contribute to the interfacial engineering of advanced heterojunction photocatalysts.
研究领域:
材料科学
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光催化
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能源转换
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Peng Qiu,Huiyun Wei,Qianming Huang,Meina Yu,Yuyu Hu,Xiaoli Zhu,Heng Liu,Xinhe Zheng
In this work, gallium nitride (GaN) is employed for the first time to modulate the charge dynamics of quantum dot-sensitized solar cells (QDSCs). An ultrathin GaN layer has been coated on the surface of both mesoporous TiO 2 photoanode and quantum dots (QDs) at 240 °C by plasma-enhanced atomic layer deposition (PEALD) approach. It is revealed that there exists a stepped energy level alignment among the as-prepared TiO 2 film, GaN layer and QDs, which accelerates the extraction and collection of photogenerated electrons. Meanwhile, a type-II core-shell QD/GaN structure is formed benefiting from the self-limiting reactions of PEALD, resulting in an enhanced light absorption and a redshift of absorption edge. In addition, the dense GaN layer can also effectively inhibit the reverse transfer of photogenerated electrons from TiO 2 to QDs or electrolyte while improving the connection between TiO 2 and QDs. Ultimately, the QDSCs with a 0.68 nm-thick GaN layer achieve a 29% increase of short-circuit current density and enhanced device efficiency, even with reduced fill factor. This work has shown the multi-functions of GaN in regulating the charge dynamics of QDSCs as well as the potential advantages in replacing TiO 2 as photoanode for electronic extraction and transport.
研究领域:
材料科学
·
能源技术
·
纳米技术
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·Vol. 37
·期 28
·2501875
·
IF 26.8
Jie Zhang,Thomas Dittrich,Qian Li,Chenwei Ni,Zhongrui Min,Lingcong Zhang,Jiangshan Qu,Mingrun Li,Xiuli Wang,Can Li,Fengtao Fan
Ferroelectric materials, known for their non-inversion symmetry, show promise as photocatalysts due to their unique asymmetric charge separation, which separates hydrogen and oxygen evolution sites. However, the strong depolarized field induces a relaxed surface structure, which in turn directly leads to slow hole charge transfer dynamics, hindering their efficiency in water splitting. In this study, a fundamental breakthrough in dramatically enhancing the overall water-splitting activity is presented, through the synergistically regulating of the surface behaviors of photogenerated carriers, resulting in nearly perfect parallel dynamics and balanced amounts. By depositing atomic layers of TiO 2 onto the surface of PbTiO 3 , surface vacancies are effectively passivated, significantly prolonging the hole lifetime from 10 −6 to 10 −3 s. Spatially resolved transient photovoltage spectroscopy showed that improved hole dynamics led to a 180° phase shift between photogenerated electrons and holes, indicating nearly identical extraction dynamics. Notably, hole and electron concentrations increased to equivalent levels. This leads to a nearly 578-fold increment in the apparent quantum yield, resulting in significantly increased overall water-splitting rates, with a quantum yield of 5.78% at 365 nm. The strategy is also effective with Al 2 O 3 and SiO 2 , demonstrating its versatility across varied materials, providing a valuable method for creating high-performance ferroelectric photocatalysts.
研究领域:
材料科学
·
光催化
·
能量转换
·
铁电学
·
可再生能源
✓ 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）