Article
Nanoscience & Nanotechnology
Oleg Lupan, Nicolae Magariu, Rasoul Khaledialidusti, Abhishek Kumar Mishra, Sandra Hansen, Helge Krueger, Vasile Postica, Helge Heinrich, Bruno Viana, Luis Katsuya Ono, Beatriz Roldan Cuenya, Lee Chow, Rainer Adelung, Thierry Pauporte
Summary: A comparative investigation was conducted on the influence of post-electroplating treatments on the gas detecting performances of single ZnO nanorods/nanowires. Different treatments were found to enhance material properties, with higher temperature synthesis resulting in increased gas response to H-2 gas. Thermal annealing and hydrothermal treatment were shown to further increase sensor response, indicating potential for high-performance devices in flexible and wearable electronics.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Issam Boukhoubza, Elena Matei, Anouar Jorio, Monica Enculescu, Ionut Enculescu
Summary: ZnO nanostructures were synthesized using electrochemical methods and their properties were investigated under different potentials. It was found that using a graphene/Cu electrode led to the formation of ZnO nanowires with smaller diameter and higher emission intensity compared to deposition directly on copper surface.
Article
Materials Science, Ceramics
Smita Dey, Asit Kumar Kar
Summary: The role of FRET and charge transfer in controlling the luminescence of PPy-ZnO nanocomposites is discussed. The nanocomposites were synthesized with different ZnO content, and nanowires were observed in the SEM and TEM images. XRD spectra showed ordering in the polymer chain with the incorporation of ZnO. The absorption peak of PPy red shifted in the nanocomposites, indicating increased singlet exciton diffusion. FRET dominantly occurred at lower ZnO content, while charge transfer dominated at higher ZnO content due to type II band alignment. Increasing ZnO content increased the interfacial area and the rate of charge transfer, leading to decreased photoluminescence intensity.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Qinrong He, Xuan Li, Jinshuai Zhang, Han Zhang, Joe Briscoe
Summary: The study successfully fabricated a p-n junction ZnO textile nanogenerator using PEDOT:PSS/CuSCN-coated ZnO nanorods, combining the advantage of ZnO piezoelectricity and textile flexibility. It was found that increasing the length of ZnO nanorods can lead to higher output voltage and power density in the nanogenerators, which could be applied in designing future flexible self-powered devices and wearable electronics.
Article
Chemistry, Physical
Lequn Li, Chujun Yao, Li Wu, Kai Jiang, Zhigao Hu, Ning Xu, Jian Sun, Jiada Wu
Summary: In this study, the enhancement of UV emission of ZnO was achieved by covering the ZnO nanorods with a ZnS coating. The results showed that the NBE emission of ZnO was significantly enhanced after the ZnS coating, both at room temperature and reduced temperatures.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Aubry Martin, Audrey Potdevin, Francois Reveret, Emmanuel Centeno, Rafik Smaali, Fatima Omeis, David Riassetto, Elena Kachan, Yves Jourlin, Genevieve Chadeyron, Michel Langlet
Summary: An original ZnO nanowire architecture was developed using a soft chemistry approach, involving photoimprinting of a sol-gel ZnO-based photosensitive seed layer and subsequent localized hydrothermal growth of ZnO nanowires. The optimized protocol resulted in uniform and reproducible linear and periodic gratings of ZnO nanowires. Morphological and photoluminescence studies revealed the unique characteristics of the nanowire gratings, including a hedgehog-like profile and enhanced red part emission. Electromagnetic simulations demonstrated the role of the gratings in boosting the ZnO emission through light localization and diffractive mechanisms, allowing the extraction of resonant photons at specific angles and wavelengths.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Haiying Xu, Juan Xu, Mingming Jiang, Maosheng Liu, Kai Tang, Caixia Kan, Daning Shi
Summary: In this study, one-dimensional (1D) superlattice microwires were synthesized and used to construct a waveguide light source, demonstrating their optical properties. The results indicate that these 1D superlattice microwires can be employed to develop exciton-polariton luminescence/lasing light sources with low-threshold/thresholdless lasers for practical applications.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Feng Ke, Chuanjun Zhou, Mengke Zheng, Hao Li, Junjie Bao, Chen Zhu, Yongbo Song, Wen Wu Xu, Manzhou Zhu
Summary: The synthesis and properties of a novel alloyed Ag-Cu nanowire were described in this study, showing good conductivity and resistivity consistent with that of a semiconductor. This alloyed nanowire has potential applications in electronic devices due to its excellent thermal stability and high-yielding gram-scale synthesis.
CHEMICAL COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Ryota Narishige, Naoto Yamashita, Kunihiro Kamataki, Takamasa Okumura, Kazunori Koga, Masaharu Shiratani, Hisato Yabuta, Naho Itagaki
Summary: Epitaxial growth of (ZnO)(x)(InN)(1-x) films on 0.9%-lattice-mismatched ZnO substrates was achieved by sputtering at 450 degrees C. Films fabricated on O-polar substrates showed higher crystal quality and smoother surface. High-resolution transmission electron microscopy revealed distinct growth modes on O-polar and Zn-polar surfaces.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Fatemeh Abbasi, Fahimeh Zahedi, Mohammad Hasan Yousefi
Summary: This study synthesized pure zinc oxide and cadmium-doped zinc oxide nanorods through thermal decomposition, analyzing their optical, structural, and morphological characteristics using various techniques. The incorporation of Cd led to a change in morphology and enhanced specific peak in the UV region of the PL spectra. ZnO:Cd samples exhibited significant photosensitivity in UV photodetection applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Optics
L. Zhang, C. L. Heng, X. Wang, W. Y. Su, T. G. Finstad
Summary: We studied the enhancement effects of ultraviolet emission from rare earth ytterbium doped ZnO films by using capping layers of Al and SiO2 micro-spheres. The results showed that the UV emission was enhanced by several to dozens times compared to the case without any capping. The enhancement was attributed to the increased optical (or electrical) fields around the film surface and defect passivation after the capping.
Article
Materials Science, Multidisciplinary
E. Zielony, M. A. Pietrzyk
Summary: This paper focuses on fundamental studies of ZnO/ZnMgO nanowire p-n junctions grown by MBE on Si substrate for UV light emitting sources. The investigation of defects responsible for optical emission from the nanowires was emphasized, and electro-optical properties of the diodes were studied through PL and DLTS. Fabrication of n-ZnMgO/p-Si p-n junctions and verification of their quality through electrical measurements were also conducted. PL experiments revealed excitonic transitions and a deep-level emission peak, with the depletion region located on the n-type side of the p-n junction according to C-V results. DLTS measurements identified electron traps related to ZnO, with parameters such as activation energies and capture cross sections determined.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Optics
K. Saravanan, Sujoy Sen, Chidambara Sharma, S. Amirthapandian, Mukul Gupta, B. Sundaravel, N. V. Chandra Shekar
Summary: Highly aligned ZnO nanostructures were created through glancing angle ion irradiation. ZnO thin films were deposited on Si substrates using pulsed laser deposition, followed by irradiation with 100 keV Xe+ ions at a glancing angle of 70 degrees. The resulting nanostructures exhibited a transformation from randomly oriented flower petal-like structures to aligned nanostripes, nanowires, and wrinkled structures with increasing ion fluence. X-ray diffraction analysis confirmed the hexagonal wurtzite structure of the ZnO nanostructures, and photoluminescence emissions in the UV regime were observed. The exciton emission of the ion beam modified ZnO nanostructures was further analyzed using X-ray absorption spectroscopy at O K-edge.
JOURNAL OF LUMINESCENCE
(2023)
Article
Nanoscience & Nanotechnology
Yun Xiao, Haibin Wang, Fumiyasu Awai, Naoyuki Shibayama, Takaya Kubo, Hiroshi Segawa
Summary: This study fabricated eco-friendly solar cells using interdigitated layers consisting of ZnO nanowires and infrared absorbing AgBiS2 nanocrystals. The quality of ZnO nanowires and its defects affecting solar cell performance were investigated. Oxygen vacancies and Zn interstitial sites were identified as the main recombination sites, hindering carrier collection in the solar cells. By reducing the concentration of these defects, the structural order and electron-phonon interaction in ZnO nanowires were improved. Furthermore, the study emphasized the significance of reducing defects in ZnO for improving not only colloidal quantum dot solar cells but also other emerging solar cell technologies.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Phung Thi Thu, Vu Duy Thinh, Vu Dinh Lam, Ta Ngoc Bach, Le Thi Hong Phong, Do Hoang Tung, Do Hung Manh, Nguyen Van Khien, Trinh Xuan Anh, Ngo Thi Hong Le
Summary: This work investigates the photocatalytic performance of ternary CuO-Ag-ZnO nanowires synthesized using a two-step approach. The introduction of Ag and CuO nanostructures onto the surface of ZnO nanowires is achieved through plasma electrolytic oxidation. The as-prepared samples are characterized in terms of structure, size, morphology, and optical properties. The CuO-Ag-ZnO nanowires exhibit higher decolorization rate and shorter half-life time compared to Ag-ZnO and bare ZnO nanowires, indicating superior visible light-driven photocatalytic properties. The synergic incorporation between noble metal-semiconductor or semiconductor-semiconductor at the interfaces of Ag-CuO, Ag-ZnO, and CuO-ZnO expands the visible light absorption range and eliminates photogenerated electron-hole recombination.
Article
Multidisciplinary Sciences
Tao Fang, Tiantian Wang, Xiansheng Li, Yuhui Dong, Sai Bai, Jizhong Song
Summary: This study demonstrates green perovskite QLEDs with improved efficiency and operational lifetime by balancing charge injection, showing high color saturation and excellent external quantum efficiency. Modulating charge balance significantly enhances the operational lifetime of the devices, further highlighting the potential of perovskite QLEDs for practical applications.
Article
Optics
Jiawei Chen, Jian Wang, Xiaobao Xu, Jinhang Li, Jizhong Song, Si Lan, Sinan Liu, Bo Cai, Boning Han, Jake T. Precht, David Ginger, Haibo Zeng
Summary: Halide perovskite LEDs are a new type of white light-emitting diode that utilizes efficient and low-cost lighting technologies, featuring a single broadband emissive layer without the need for phosphors. These LEDs operate with high peak luminance and external quantum efficiency, with potential for further improvements in the future through advancements in fabrication technology and mechanistic understanding.
Article
Materials Science, Multidisciplinary
Le Ma, Boning Han, Fengjuan Zhang, Leimeng Xu, Tao Fang, Shalong Wang, Jizhong Song
Summary: This review focuses on the application of metal halide perovskites in light-emitting diodes, discussing the types of defects affecting their efficiency and suppression strategies, as well as looking forward to future directions.
APPLIED MATERIALS TODAY
(2021)
Article
Chemistry, Multidisciplinary
Boning Han, Shichen Yuan, Bo Cai, Jizhong Song, Wenqiang Liu, Fengjuan Zhang, Tao Fang, Changting Wei, Haibo Zeng
Summary: A methylene-bis-acrylamide cross-linking strategy is proposed to enhance the stability of perovskite light-emitting diodes (PeLEDs) by increasing the binding energy and activation energy, thereby preventing ions from migrating inside and across crystals. This strategy not only improves the external quantum efficiency, but also extends the half-life of the devices, making them more stable during continuous operation.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Multidisciplinary Sciences
Fengjuan Zhang, Jizhong Song, Bo Cai, Xi Chen, Changting Wei, Tao Fang, Haibo Zeng
Summary: Color-stable blue PeLEDs were achieved through a hydrogen-bonded amine-group doping strategy, with emission peaks fixed at 490.5 (GA) and 492.5 (FA) nm without any obvious shift as the voltage increases. The maximum external quantum efficiency was also significantly improved.
Article
Engineering, Environmental
Tiantian Wang, Xiansheng Li, Tao Fang, Shalong Wang, Jizhong Song
Summary: A ligand-mediated strategy was proposed to synthesize gamma-phase CsPbI3 perovskite NCs in non-polar solvent at room temperature for the first time. This method showed superior universality as evidenced by the successful synthesis of efficient red-green-blue CsPbX3 NCs, indicating that room-temperature synthesis could avoid the tediousness of typical hot-injection at high temperatures.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Optics
Jisong Yao, Leimeng Xu, Shalong Wang, Jizhong Song
Summary: Metal halide perovskites have emerged as promising materials for white light-emitting diodes (WLEDs) due to their excellent optoelectronic properties. Achieving efficient and stable perovskite-based WLEDs remains a challenge despite rapid progress in recent years.
JOURNAL OF PHYSICS-PHOTONICS
(2022)
Article
Chemistry, Physical
Zhi Yang, Tianchi Wang, Xuhui Xu, Jisong Yao, Leimeng Xu, Shalong Wang, Yadong Xu, Jizhong Song
Summary: Researchers have designed a fiber optic plate (FOP) coupled perovskite X-ray camera to reduce the dose rate for dental X-ray imaging. After FOP coupling, the pulp cavity, root canal, dentin, and root canal file can be clearly observed at a dose rate as low as 3 muGy(air) s(-1), which is lower than the required dose rate for commercial intraoral dental sensors. This portable X-ray camera shows great potential in intraoral dental X-ray imaging.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Wenxuan Fan, Leimeng Xu, Zhi Yang, Yingliang Liu, Jizhong Song
Summary: In recent years, lead-free perovskites have gained increasing attention due to their outstanding optoelectronic properties and non-toxicity. However, the luminescence efficiency and stability of lead-free perovskites still need to be improved. In this study, an A-site engineering strategy was introduced to enhance the luminescence performance of Cs(3)Cu(2)I(5) through a simple and cost-effective solution method. By incorporating the formamidinium cation (FA(+)), the lattice defects in Cs3Cu2I5 were significantly reduced, leading to a decrease in non-radiative recombination and an improvement in luminous efficiency. The optimized FA(+)-engineered Cs3Cu2I5 exhibited a photoluminescence quantum yield (PLQY) of 95%, representing a 35.7% improvement.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Mingyang Li, Jindi Wang, Jisong Yao, Shalong Wang, Leimeng Xu, Jizhong Song
Summary: Increasing the content of Br-based passivation ligands is shown to enhance the external quantum efficiency of perovskite quantum dot light-emitting diodes. However, the operational lifetimes decrease due to intensified ion migration. Analysis suggests that a small amount of residue oleic acid ligands can weaken ion migration. A halide- and acid-hybrid co-passivation strategy is proposed to optimize the ligand content and achieve a balance between efficiency and stability.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Zhi Yang, Tianchi Wang, Xuhui Xu, Jisong Yao, Leimeng Xu, Shalong Wang, Yadong Xu, Jizhong Song
Summary: By designing a fiber optic plate (FOP) coupled perovskite X-ray camera, we have successfully reduced the dose rate for dental X-ray imaging and achieved clear observation of the pulp cavity, root canal, dentin, and root canal file under a low dose rate. This designed portable X-ray camera shows great potential in intraoral dental X-ray imaging.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Wenxuan Fan, Kaishuai Zhang, Shalong Wang, Leimeng Xu, Yingliang Liu, Jizhong Song
Summary: This study proposed a ligand engineering strategy to enhance the stability of Cs3Cu2I5 by inhibiting the oxidation of Cu+ to Cu2+. By using ethylenediaminetetraacetic acid (EDTA) as the organic molecule, the interaction between carboxyl groups and Cu+ was strengthened, resulting in improved light emission stability and properties of Cs3Cu2I5. EDTA-engineered Cs3Cu2I5 also showed enhanced photoluminescence quantum yield (PLQY) and was used in constructing a high-quality white-light emitting diode (WLED).
Review
Chemistry, Multidisciplinary
Jisong Yao, Leimeng Xu, Shalong Wang, Zhi Yang, Jizhong Song
Summary: Light-emitting diodes based on lead halide perovskite nanocrystals have achieved a remarkable increase in efficiency and are important for the development of the next generation of ultra-high-definition displays. However, the ion migration in mixed-halide perovskites can affect the spectral stability and operational lifetimes of perovskite light-emitting diodes. Therefore, it is crucial to develop efficient color-saturated perovskite light-emitting diodes based on single-halide perovskite nanocrystals.
Review
Chemistry, Physical
Leimeng Xu, Shichen Yuan, Le Ma, Baisong Zhang, Tao Fang, Xiansheng Li, Jizhong Song
Summary: Solution-processed colloidal lead halide perovskite quantum dots are considered promising candidates for next-generation photovoltaics due to their excellent optoelectronic properties and low-cost synthetic process. While remarkable breakthroughs have been made in bulk perovskite solar cells, all-inorganic perovskite quantum dot-based solar cells are still catching up. Various optimization means have been discussed to improve the performance of all-inorganic perovskite quantum dot-based solar cells.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Li Yan, Li Jinhang, Xu Leimeng, Chen Jiawei, Song Jizhong
Summary: This study focused on the purification issues of CsPbI3 quantum dots and proposed a mixed-solvent purification strategy and ligand compensation strategy to successfully prepare CsPbI3 QDs with high photoluminescence quantum yield and excellent electrical properties. Experimental results showed that the QLED prepared from these QDs achieved good luminance performance under electrically driven conditions.
ACTA CHIMICA SINICA
(2021)
