Article
Chemistry, Multidisciplinary
Asmae El Aouami, Laura M. Perez, Kawtar Feddi, Mohamed El-Yadri, Francis Dujardin, Manuel J. Suazo, David Laroze, Maykel Courel, El Mustapha Feddi
Summary: The shape of quantum dots has a significant impact on the electronic and photonic characteristics of intermediate band solar cells, with cubic quantum dots showing the highest photovoltaic conversion efficiency.
Article
Crystallography
Hind Althib
Summary: Models describing the tunneling of electrons and holes through parabolic InxGa1-xN/GaN quantum well/LED structures with respect to strain were developed. The study found that an increase in the mole fraction can lead to efficiency droop in the LED structure.
Article
Physics, Condensed Matter
F. Sonmez, S. Ardali, B. Arpapay, E. Tiras
Summary: The photoluminescence properties of InGaN/GaN multiple quantum wells with different quantum well numbers were studied in this research. The observed shift in the peak energy of photoluminescence with increasing temperature is explained by the S-shaped behavior. The localization states of carriers and the inhomogeneity in the samples contribute to this behavior. The study also discusses the parameters that characterize the degree of carrier localization and the activation energy.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Energy & Fuels
Bilel Chouchen, Frederique Ducroquet, Samia Nasr, Abdullah Y. A. Alzahrani, Ali T. Hajjiah, Mohamed Hichem Gazzah
Summary: InxGa1-xN/GaN solar cells show optimized efficiency at high temperatures by balancing In composition and working temperature, with the need to reduce indium content as temperature rises to limit carrier concentration impact, while the band offsets become less limiting and thermionic transport probability increases with higher temperature.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Engineering, Electrical & Electronic
Yang Dai, Zhaoyang Lu, Qingsong Ye, Jiangtao Dang, Shenglei Zhao, Xiaoyi Lei, Jiangni Yun, Wu Zhao, Xiaojiang Chen
Summary: A novel n-InxGa1-xN/N-GaN homotype heterostructure IMPATT diode is proposed as an alternative to the GaN p-n IMPATT diode. The performance of the homotype heterojunction IMPATT improves as the In composition increases, with better frequency bandwidth and ability to withstand bias current density compared to p-n IMPATT.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Chemistry, Multidisciplinary
Yu-Chung Lin, Ikai Lo, Cheng-Da Tsai, Ying-Chieh Wang, Hui-Chun Huang, Chu-An Li, Mitch M. C. Chou, Ting-Chang Chang
Summary: Red, green, and blue lighting micro-LEDs can be fabricated using InxGa1-xN multiple quantum wells grown on GaN/γ-LiAlO2 microdisk substrates. Optimization of self-assembly growth of InxGa1-xN multiple quantum well microdisks using a ball-stick model has been achieved through bottom-up nanotechnology. It has also been demonstrated that a beautiful InxGa1-xN-QW microdisk for optoelectronic applications can be fabricated by selecting an appropriate buffer layer.
Article
Nanoscience & Nanotechnology
Tong Wei, Kai Lian, Jiaqi Tao, Hu Zhang, Da Xu, Jiachen Han, Chao Fan, Zihui Zhang, Wengang Bi, Chun Sun
Summary: A large-area liquid luminescent solar concentrator (LSC) with high photoluminescence quantum yield (PLQY) and optical conversion efficiency has been fabricated using Mn-doped perovskite materials.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Electrical & Electronic
N. Yahyaoui, A. Jbeli, N. Zeiri, S. Abdi-Ben Nasrallah, S. Saadaoui, M. Said
Summary: In this study, the third-order nonlinear susceptibility associated with intersubband transition in a GaN/GaN/InxGa1-xN/GaN quantum dot-quantum well (QD-QW) structure was investigated theoretically. The results showed that the intensity and position peak of susceptibility were significantly affected by the geometrical parameters, applied electric field, and indium concentration.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Crystallography
Laura M. Perez, Asmae El Aouami, Kawtar Feddi, Vittorianna Tasco, Abdellatif Ben Abdellah, Francis Dujardin, Maykel Courel, Javier A. Riquelme, David Laroze, E. L. Mustapha Feddi
Summary: This study focuses on improving the efficiency of photovoltaic cells by juxtaposing two different combinations of quantum dots in the I region of the PIN junction, aiming to determine the optimized parameters. By controlling the size and inter-dot distance of quantum dots, the intermediate band can be tailored to enhance solar cell efficiency.
Article
Crystallography
Huei-Jyun Shih, Ikai Lo, Ying-Chieh Wang, Cheng-Da Tsai, Yu-Chung Lin, Yi-Ying Lu, Hui-Chun Huang
Summary: Key properties of the lattice-matched InxGa1-xN/InyAl1-yN quantum wells, such as band-gap energy, indium concentration, and lattice mismatch, were measured using different techniques. The findings suggest that these technologies will be beneficial in the fabrication of full-visible-light emitting diodes.
Article
Energy & Fuels
Angel E. Obispo, Cristofher Zuniga Vargas, William C. Algoner
Summary: This study analyzes the photovoltaic conversion efficiency of a single-intermediate band solar cell that incorporates a double quantum well structure. The results indicate that higher efficiency can be achieved under specific conditions.
Article
Materials Science, Multidisciplinary
F. Hadjaj, M. Belhadj, K. Laoufi, A. Missoum
Summary: The study shows that using high In-content InxGa1-xN/InyGa1-yN multiple quantum wells as active regions can improve the performance of laser diodes, and it is important to optimize the structural parameters to enhance their properties. However, an increase in In-content can lead to strain accumulation, which can be detrimental to structural stability, so optimizing the structure is crucial for achieving reliable optoelectronic components.
JOURNAL OF OVONIC RESEARCH
(2021)
Article
Chemistry, Physical
Qingyuan Luo, Ronghuo Yuan, Yan-Ling Hu, Defa Wang
Summary: InxGa1-xN nanowires with core/shell structure grown on n-type Si substrate by Ni-assisted CVD method were studied for their photocatalytic properties. Thicker GaN shell was found to reduce photoactivity, and a strategy to improve performance was proposed.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Heng-Sheng Shan, Ming-Hui Li, Xiao-Ya Li, Cheng-Ke Li, Sheng-Wei Liu, Yi-Fan Song, Yun-Jian Mei, Xiao-Dong Hao, Shu-Fang Ma, Bing-She Xu
Summary: The photoelectric conversion efficiency of InGaN/GaN multiple quantum well (MQW) solar cells decreased from 2.58% to 2.39% when the temperature was increased to 500°C. Analysis using atomic force microscopy (AFM) showed increased surface roughness and deterioration of crystal quality due to high-temperature treatment. X-ray diffraction analysis indicated an increase in the full width at half-maximum (FWHM) value and relaxation in the InGaN sample, suggesting degraded crystal quality in the active region. Photoluminescence (PL) spectroscopic measurements confirmed a decrease in peak intensity and a red shift in the peak wavelength in the PL spectrum. Scanning transmission electron microscopy (STEM) revealed uneven distribution of indium components and lattice distortion in the quantum well region after high-temperature treatment. First-principles calculations also confirmed the reduction in band gap and red shift in the peak wavelength due to atomic movement. The fluctuations in indium components and lattice distortion at 500°C led to an increase in nonradiative recombination centers, resulting in the degradation of photoelectric conversion efficiency in InGaN/GaN MQW solar cells.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
M. Camacho-Reynoso, C. A. Hernandez-Gutierrez, C. M. Yee-Rendon, C. Rivera-Rodriguez, D. Bahena-Uribe, S. Gallardo-Hernandez, Yuriy Kudriavtsev, M. Lopez-Lopez, Y. L. Casallas-Moreno
Summary: We report the successful growth of InxGa1-xN/GaN quantum wells in the metastable-cubic phase using two controlled methods, Migration Enhanced Epitaxy (MEE) and conventional Molecular Beam Epitaxy (conventional MBE). The In mole fraction in the c-InxGa1-xN QWs increases as the growth temperature decreases in both methods. The MEE method shows lower In segregation compared to conventional MBE. By varying the In content, excitonic transitions in the visible spectrum range were achieved and matched theoretical calculations. Chemical bonds and binding energies in each c-InxGa1-xN QW were identified using X-ray photoelectron spectroscopy (XPS).
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Environmental Sciences
Fenghua Li, Xianqi Zhao, Yanni Jiao, Xinglan Duan, Lianlong Yu, Fengjia Zheng, Xiaolin Wang, Lin Wang, Jia-Sheng Wang, Xiulan Zhao, Tianliang Zhang, Wei Li, Jun Zhou
Summary: This study analyzed the exposure level and health risks of aflatoxins (AFs) and zearalenone (ZEA) through cooking oil consumption in Shandong, China. The findings showed that children are facing the highest health risk, and liver cancer incidence is associated with exposure to aflatoxins.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Dehui Wu, Shibin Lin, Hongfu Chen, Xiaohong Wang
Summary: An analytical model for calculating the mutual inductance between coplanar rectangular spiral coils was developed in this study. The model is applicable to PCB-based spiral coils in eddy-current testing probes and can simplify the calculation process while maintaining accuracy.
INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS
(2023)
Article
Polymer Science
Xin-Xin Zhi, Hua-Sen Wang, Jie Jia, Xiao-Lei Wang, Yan-Shuang Ga, Shu-Jing Chen, Jin-Gang Liu
Summary: In this study, alignment agents derived from different poly(amic acid)s (PAAs) were prepared and applied to the fabrication of liquid crystal (LC) minicells. The polyimides (PI) alignment layers obtained from the thermal dehydration reaction of the PAA precursors showed good alignment effects to the LC molecules and exhibited good optoelectronic features.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2023)
Article
Obstetrics & Gynecology
Linli Hu, Jieqiang Lv, Qianhong Ma, Xiujuan Chen, Xiaohong Wang, Xiaoyan Liang, Dingfei Xu, Yanping Li, Yuanhua Huang, Lina Hu, Xiaohui Deng, Jing Wei, Feng Zhou, Songying Zhang, Jie Wang, Fang Ma, Yingpu Sun
Summary: The study aimed to compare the equivalence of QL1012 and Gonal-f((R)) in ovarian stimulation for assisted reproductive technology. The results showed that there were no significant differences between QL1012 and Gonal-f((R)) in the primary endpoint of oocytes retrieved, and they had similar safety profiles.
REPRODUCTIVE BIOMEDICINE ONLINE
(2023)
Article
Psychiatry
Yu Gu, Huijuan Guo, Jiansong Zhou, Xiaoping Wang
Summary: This study investigated the socio-demographic, clinical, and offense-related characteristics of mentally ill offenders in a forensic psychiatric hospital in China. The majority of the participants were male, unmarried, and had sought medical help for their mental illnesses prior to their offenses. Schizophrenia was the most common diagnosis, and homicide offenses were prevalent, with family members being the most common victims.
Article
Geochemistry & Geophysics
Shanqi Liu, Yongbing Li, Zhiming Yang, Jianming Liu
Summary: The phase stability of FeS and the equilibrium Fe isotope fractionation are important for understanding the interior of the Earth and terrestrial planets. In this study, first-principles methods were used to investigate the pressure-dependent phase transitions of FeS and the isotope fractionation between FeS phases and mantle silicates. The results show that measurable Fe isotope fractionation occurs under mantle pressure-temperature conditions.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Soil Science
Wei Shi, Yan-xia Pan, Ya-feng Zhang, Rui Hu, Xin-ping Wang
Summary: Water redistribution has a profound impact on the function of dryland ecosystems. Biological soil crusts (BSCs or biocrusts), which cover a large portion of arid land soil surface, have conflicting effects on water redistribution at a regional scale. This study clarified the effects of different biocrusts on soil hydraulic properties in the Tengger Desert. The results showed that biocrusts significantly altered soil hydraulic properties, including water holding capacity, soil hydrophobicity, water sorptivity, and unsaturated hydraulic conductivity. Understanding the role of biocrusts in hydraulic properties can help improve our understanding of soil water distribution, movement, and retention in the area.
Article
Genetics & Heredity
Liangcheng Yu, Lu Wang, Lijin Wang, Song Yan, Shuqiang Chen, Qian Xu, Danjie Su, Xiaohong Wang
Summary: This study aims to identify the association between immune cell types, immune-related genes, and recurrent implantation failure (RIF) through bioinformatics analysis. Differentially expressed genes (DEGs) were screened, and enrichment analysis and protein-protein interaction (PPI) analysis were conducted. The RIF-associated immune cell types were clarified, and differentially expressed immune cell types-related modules were identified. Three immune-related hub genes were identified and validated, and a ceRNA network was constructed.
FRONTIERS IN GENETICS
(2023)
Article
Chemistry, Multidisciplinary
Zhengrong Li, Zhongwen Ouyang, Jiaojiao Cao, Xiaochen Liu, Tongtong Xiao, Lei Wang, Youyuan Liang, Zhaoming Tian, Zhenxing Wang, Zhengcai Xia
Summary: A new perfect triangular lattice antiferromagnet K2Ni(SeO3)(2) has been synthesized, in which both in-plane and inter-plane geometric frustration is present. The compound shows antiferromagnetic order at T(N) ≈ 7 K. High-field magnetization and electron spin resonance indicate the presence of easy-plane anisotropy. Density functional theory calculations confirm the excellent two-dimensionality of the compound. Thus, K2Ni(SeO3)(2) is a perfect triangular-lattice antiferromagnet with strong frustration and easy-plane anisotropy.
CRYSTAL GROWTH & DESIGN
(2023)
Review
Pharmacology & Pharmacy
Bei Pan, Long Ge, Honghao Lai, Liangying Hou, Chen Tian, Qi Wang, Kelu Yang, Yao Lu, Hongfei Zhu, Mengting Li, Deren Wang, Xiuxia Li, Yuqing Zhang, Ya Gao, Ming Liu, Guowu Ding, Jinhui Tian, Kehu Yang
Summary: This study aimed to compare the effectiveness, safety, and tolerability of different drugs for treating insomnia. The results showed that non-benzodiazepines, antidepressants, and orexin receptor antagonists may have positive effects on improving total sleep time, sleep onset latency, and wake time after sleep onset. The choice of insomnia drugs should consider the individual's insomnia phenotype, as well as the safety and tolerability of each drug.
Article
Radiology, Nuclear Medicine & Medical Imaging
Xiaohong Wang, Guiying Du, Yao Liu
Summary: The study found that lateral meniscal body extrusion (LMBE) is associated with progression of OA-related knee structural damage over 4 years, and identified thresholds for predicting this progression.
EUROPEAN JOURNAL OF RADIOLOGY
(2023)
Article
Immunology
Genwei Zhang, Guodong Niu, Diana Hooker-Romera, Sadeq Shabani, Julian Ramelow, Xiaohong Wang, Noah S. Butler, Anthony A. James, Jun Li
Summary: In this study, antibodies against human alpha-tubulin were found to significantly reduce the number of P. falciparum oocysts in mosquito midguts. Further investigation revealed that antibodies specifically against P. falciparum alpha-tubulin-1 also limited the transmission of P. falciparum to mosquitoes. Mouse monoclonal antibodies against recombinant P. falciparum alpha-tubulin-1 were generated, and two of them, A3 and A16, effectively blocked parasite transmission.
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Lingze Yang, Lei Bao, Tong Dong, Honghao Xie, Xiaohong Wang, Huili Wang, Jingbo Wu, Chen Hao
Summary: In this study, Typha angustifolia was chemically modified with potassium permanganate to obtain modified Typha angustifolia (MTC), and then compounded with carboxymethyl cellulose (CMC) and guar gum (GG) to prepare the CMC/GG/MTC composite hydrogel. The optimal adsorption conditions were determined, and the maximum adsorption capacity for Cu2+, Co2+, and methylene blue (MB) were calculated. The results showed that the main mechanism of removing pollutants by the adsorbent is surface complexation and electrostatic attraction. The CMC/GG/MTC adsorbent exhibited good adsorption and regeneration capacity after five cycles.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Proceedings Paper
Energy & Fuels
Fan Yang, Xiaohong Wang, Haishan Guo, Hemin Yang, Zhixin Huo, Youzong Jian, Jing Hu
Summary: This paper proposes a direct AC-AC modular multilevel converter called Hexverter, which is based on cascaded full-bridge sub-modules and is suitable for connecting two systems operating at different frequencies. However, the operating range of Hexverter is limited by the capacitor voltage of the sub-modules. To address this issue, a strategy based on optimal neutral voltage and circulating current is proposed to limit the capacitor voltage within a specific range and minimize switching loss. Simulation results confirm that this strategy effectively suppresses the magnitude of the capacitor ripple voltage and reduces switching loss.
PROCEEDINGS OF THE 3RD INTERNATIONAL SYMPOSIUM ON NEW ENERGY AND ELECTRICAL TECHNOLOGY
(2023)
Review
Materials Science, Biomaterials
Dongxu Xu, Qian Duan, Hui Yu, Wenyue Dong
Summary: Porphyrins and their derivatives have excellent properties that make them attractive for various applications, but their limitations hinder their use in biomedicine. Metal-organic frameworks (MOFs) have emerged as a promising solution by combining the unique properties of porphyrins and MOFs. This article reviews the synthetic strategies and recent research achievements in forming porphyrin-based MOFs and their applications in photodynamic therapy (PDT) and tumor therapy.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
