Article
Chemistry, Physical
Amaresh Das, Durga Basak
Summary: This study presents a comprehensive investigation on the interplay between nitrogen and various defects in ZnO nanorods, revealing that nitrogen implantation induces structural damages and forms nitrogen-related defect complexes. Post-implantation annealing in O2 and Ar environments plays a key role in stabilizing nitrogen dopants in ZnO nanorods.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Y. Syryanyy, M. Zajac, E. Guziewicz, W. Wozniak, Y. Melikhov, M. Chernyshova, R. Ratajczak, I. N. Demchenko
Summary: Virgin and Yb-implanted epitaxial ZnO films grown using ALD were investigated by XAS. The polarization dependence of the films determined by the orientation of the polarization vector of the synchrotron radiation to the sample surface was revealed. The implantation and subsequent annealing were found to have an important influence on the native point defect complexes in the ZnO. The presence of donor-acceptor complexes in the samples was confirmed through the comparison of experimental and modelled spectra.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Dojalisa Sahu, Amrita Palai, Nihar Ranjan Panda
Summary: In this study, Y ZnO nanocrystallites were synthesized using ultrasonication and doped with boron and nitrogen. Structural changes in ZnO upon B/N doping were observed through XRD, with shifting and broadening of peak positions. Boron doping resulted in decreased electrical resistivity and increased carrier concentration in ZnO, while nitrogen doping initially increased carrier concentration before decreasing it.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Ceramics
Roman Yatskiv, Jan Grym, Sarka Kucerova, Stanislav Tiagulskyi, Ondrej Cernohorsky, Nikola Basinova, Jozef Vesely
Summary: This paper examines the effects of annealing atmosphere and temperature on defect-related emission in ZnO thin films and bulk substrates. The results demonstrate that post-annealing treatment is a powerful tool for modifying defects in ZnO and accurately tailoring emission wavelength. This research has significant implications in optoelectronics, particularly in LED, display, and biological labeling technologies.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Xinxin Xia, Tsz-Ki Lau, Xuyun Guo, Yuhao Li, Minchao Qin, Kuan Liu, Zeng Chen, Xiaozhi Zhan, Yiqun Xiao, Pok Fung Chan, Heng Liu, Luhang Xu, Guilong Cai, Na Li, Haiming Zhu, Gang Li, Ye Zhu, Tao Zhu, Xiaowei Zhan, Xun-Li Wang, Xinhui Lu
Summary: The morphology of organic thin film, including in-plane and out-of-plane directions, is crucial for the performance of organic solar cells. Utilizing GTSAXS, researchers uncovered the nanomorphology in the out-of-plane dimension and demonstrated its impact on exciton dissociation and charge transfer.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
N. H. Erdogan, T. Kutlu, N. Sedefoglu, H. Kavak
Summary: Undoped ZnO films and Na-doped ZnO films with different Na/Zn molar ratios were deposited on glass substrates by the sol-gel spin coating method. Sodium doping significantly influenced the structure and properties of the films, resulting in different electrical conductivity and optical characteristics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Apu Mondal, S. Pal, Suvadip Masanta, Sourabh Pal, Rajib Saha, Pravin Kumar, A. Singha, S. Chattopadhyay, D. Jana, A. Sarkar
Summary: The study found that rapid thermal annealing helps to maintain nitrogen at lattice positions, while conventional furnace annealing promotes nitrogen outdiffusion, also explaining the mechanism of nitrogen enrichment in ZnO.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Optics
Smita Dey, Asit Kumar Kar
Summary: The optical properties of luminescent PMMA-ZnO nanocomposites are affected by the variation of ZnO concentration, which decreases emission intensity but increases energy transfer efficiency as ZnO concentration increases. The photoluminescence quantum efficiency of the composite with highest emission is 74%.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Physical
Sathi Chatterjee, Asit Kumar Kar
Summary: The study synthesized pure ZnO and ZnO nanomaterials doped with different ratios (4%, 6%, and 8%) of Cu2+ ions, observing various changes in properties and effects through a series of experiments, such as alterations in lattice structure, spectral characteristics, and photocatalytic effects.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Qaisar Khushi Muhammad, Lukas Porz, Atsutomo Nakamura, Katsuyuki Matsunaga, Marcus Rohnke, Juergen Janek, Juergen Roedel, Till Froemling
Summary: This study demonstrates that dislocations can be used to modulate the conductivity of ceramic materials by accurately controlling the arrangement of dislocations, achieving effects similar to chemical doping. By combining various testing methods, mechanical control of the interaction between neighboring dislocations is achieved, allowing differentiation between conducting pathways and separated charge regions.
Article
Chemistry, Physical
Jiamin Lin, Chujun Yao, Li Wu, Kai Jiang, Zhigao Hu, Lequn Li, Ning Xu, Jian Sun, Jiada Wu
Summary: A plasma-assisted method was utilized to synthesize CuO and decorate ZnO nanorods, resulting in significantly higher photocatalytic activity of CuO-decorated ZnO nanorods compared to pure CuO films and bare ZnO nanorods. The enhanced photocatalytic activity was explained by a proposed Z-scheme electron transfer mechanism for nanostructured ZnO/CuO heterogeneous composites.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Yong Cheng, Chenxue Lin, Chong Luo, Weicheng Liu, Ming-Sheng Wang
Summary: Despite the potential of alkali metal batteries, safety concerns due to dendrite growth limit their commercial applications. This study explores the possibility of using both Na+ and K+ ions in Na-K alloy anodes, finding that the type of deposited metal is influenced by the electrolyte. The concurrent use of Na+ and K+ ions can prevent dendrite formation and enhance the energy density of the battery, providing guidance for the development of liquid-alloy batteries.
Article
Chemistry, Physical
J-X Zhou, X-Y Zeng, F-M Xie, Y-H He, Y-Q Tang, Y-Q Li, J-X Tang
Summary: The choice of secondary donor/acceptor has significant effects on the properties and efficiencies of TADF emitters. Two new orange-red TADF emitters, CN-BP-TPA and CF3-BP-TPA, show high photoluminescence quantum yields and excellent performance in OLEDs.
MATERIALS TODAY ENERGY
(2021)
Article
Chemistry, Physical
Fu Sun, Leo Duchene, Markus Osenberg, Sebastian Risse, Chao Yang, Libao Chen, Nan Chen, Yongxin Huang, Andre Hilger, Kang Dong, Tobias Arlt, Corsin Battaglia, Arndt Remhof, Ingo Manke, Renjie Chen
Summary: Through non-destructive and cross-sectional visualization using synchrotron X-ray tomography, a new capacity decaying mechanism in all-solid-state Na batteries has been proposed, which is caused by electrochemically generated inactive Na electrodeposits.
Article
Chemistry, Multidisciplinary
L. Seravalli, F. Esposito, M. Bosi, L. Aversa, G. Trevisi, R. Verucchi, L. Lazzarini, F. Rossi, F. Fabbri
Summary: Strain engineering is an efficient tool for adjusting the electrical and optical properties of 2D materials. In this study, we found that the built-in strain in MoS2 monolayers grown on a SiO2/Si substrate is mainly dependent on the size of the monolayer. A critical size of 20 μm was identified, beyond which the built-in strain significantly increased. The maximum built-in strain was observed in a 60 μm sized monolayer, which resulted in 1.2% tensile strain with partial strain release near the triangular vertexes due to nanocrack formation. These findings suggest that the standard method for evaluating the number of layers based on Raman mode separation may be unreliable for highly strained monolayers with a lateral size above 20 μm.
