Article
Chemistry, Physical
Xianyu Chu, Fanling Meng, He Yang, Wei Zhang, Tingting Qin, Zizhun Wang, Sebastian Molin, Piotr Jasinski, Weitao Zheng
Summary: In this study, Cu-doped Co-based LDH materials were prepared as electrode materials with excellent conductivity and charge transfer capability. The introduction of copper increased the electron density of cobalt-based hydroxide, resulting in improved charge storage capacity. The fabricated CuCo-LDH electrode exhibited high energy density and remarkable cycling stability.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xia Zhou, Enhui Huang, Rui Zhang, Hui Xiang, Wenying Zhong, Bo Xu
Summary: Inorganic electrochromic (EC) materials are widely used in displays and smart windows for reversible optical property changes. However, achieving multicolor tunability is a challenge for most inorganic EC materials. This study suggests that the Burstein-Moss (BM) effect, which expands the optical gap through carrier density, could be a potential mechanism to realize multicolor tunability in EC materials. By selecting suitable degenerate semiconductors with appropriate band gaps and carrier masses, multicolor tunable EC materials based on the BM effect may be developed. The BM effect also allows selective modulation of absorption for near infrared and visible light, offering potential applications in designing novel EC smart windows.
Article
Physics, Applied
Manju Kumari Jaiswal, Biswajit Choudhury
Summary: This study reports the photocatalytic activity of doped graphitic carbon nitride under visible light. Doped samples showed improved band structure and absorption properties compared to the pure form. Various factors such as dopant-induced strain and quantum confinement contributed to the enhanced photocatalytic performance.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Materials Science, Ceramics
Dongwen Gao, Li Wang, Xueqiong Su
Summary: This study investigates the influence of different doping ratios on the composition, structure, morphology, and luminescence properties of bulk ceramics, determining the optimum doping ratio in this range. The research enhances the optical performance of the material, suggesting improved microstructural, optical, and electrical properties for potential use in new optoelectronic devices.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Rachel Woods-Robinson, Yihuang Xiong, Jimmy-Xuan Shen, Nicholas Winner, Matthew K. Horton, Mark Asta, Alex M. Ganose, Geoffroy Hautier, Kristin A. Persson
Summary: Many semiconductors have weak or forbidden transitions at their band edges, creating a widened transparency region. The presence of forbidden transitions has been neglected in the study of new p-type transparent conductors, unlike in n-type transparent conductors. Through computation and analysis of absorption spectra, it is found that compounds with highly localized band-edge states are more likely to exhibit forbidden transitions. This study suggests potential p-type and n-type transparent conductor candidates with forbidden transitions.
Article
Nanoscience & Nanotechnology
Hsieh-Chih Chen, Chieh-Ming Hung, Chun-Hong Kuo
Summary: Natural vitamin B was added into the precursor solution to passivate ionic defects in perovskite films, leading to improved charge transport efficiency in PSCs and significantly increased power conversion efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Inorganic & Nuclear
Zohra Nazir Kayani, Ammara Iqbal, Zainab Bashir, Saira Riaz, Shahzad Naseem
Summary: Researchers are increasingly interested in thin film materials due to the growing demand in the electronics industry. In this study, K-doped TiO2 thin films were synthesized using sol-gel dip-coating, and the effects of K concentration on the properties of the films were investigated. The results showed that K doping had a significant impact on the morphological, structural, magnetic, dielectric, antibacterial, and optical characteristics of the TiO2 films.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
M. F. Al-Kuhaili, Q. A. Drmosh
Summary: Tungsten oxide (WO3) thin films are commonly used as functional coatings in various applications. Doping with Fe has been considered effective for improving their properties. However, this study found that Fe-doped WO3 thin films deposited by co-sputtering exhibited reduced crystallinity, increased electrical resistivity, and widened band gap, resulting in inferior functional performance.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Physics, Applied
Boyang Xiang, Guiru Gu, Nagarajan Ramaswamyd, Christopher Drew, Xuejun Lu
Summary: This paper presents voltage-tunable e-SWIR photodetectors based on GaSb n-i-p and p-i-n homojunctions, which offer bias-dependent photodetection band tuning. The detection bands can be tuned between 1.7 μm and 1.9 μm with a low reverse bias voltage. The voltage-dependent band-tuning mechanism is attributed to the Moss-Burstein effect, which changes the electron and hole filling factors. This analysis provides useful guidance for the designs of e-SWIR photodetectors.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Golam Murtaza Mirza, Mahamud Hasan Tusher, Nazmus Sakib, Naymul Islam
Summary: The surface morphology, structure, and optical characteristics of undoped and Al-doped ZnO thin films were investigated. Thin films were prepared on glass substrates using the sol-gel spin-coating technique, with Al-doping concentrations of 1.5% and 2.5%. Structural analysis revealed a decrease in grain size and an increase in dislocation density after adding Al dopants. Scanning electron microscopy data showed that undoped ZnO particles were spherical and agglomerated, while the particle size decreased and transmittance decreased with increasing Al-dopant concentration according to the related histograms and distribution curve. Additionally, band gaps of the films were observed to decrease with increasing Al-dopant percentage.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Olim Ruzimuradov, Khusniddin Musaev, Shavkat Mamatkulov, Khakimjan Butanov, Isabel Gonzalo-Juan, Liudmila Khoroshko, Nurmuhammad Turapov, Suvonkul Nurmanov, Jamoliddin Razzokov, Victor Borisenko, Ralf Riedel
Summary: Nickel and chromium metal ions have been used to extend the light absorption range of titanium dioxide nanocrystals by doping and co-doping them. Various analysis techniques were employed to study the modified materials, revealing that the modified catalyst primarily contains the anatase polymorph. The incorporation of transition metal ions in the TiO2 nanocrystals resulted in a decrease in the band gap width and a decrease in photoluminescence intensity.
Article
Nanoscience & Nanotechnology
Jian Zhang, Yi Zhu, Mike Tebyetekerwa, Delong Li, Dan Liu, Weiwei Lei, Lifeng Wang, Yupeng Zhang, Yuerui Lu
Summary: Substitutional doping of monolayer transition metal dichalcogenides (TMDs) with vanadium has been successfully achieved, resulting in significant enhancement of photoluminescence (PL) intensity and dominance of exciton recombination over trion recombination. Controllable vanadium doping allows for tuning of optical bandgap of MoS2 and threshold voltage of field-effect transistors (FETs). This study demonstrates the potential for applications in optoelectronics by preparing Mo-based monolayer TMDs with controllable vanadium doping.
ACS APPLIED NANO MATERIALS
(2021)
Article
Multidisciplinary Sciences
N. J. Bailey, T. B. O. Rockett, S. Flores, D. F. Reyes, J. P. R. David, R. D. Richards
Summary: This study thoroughly investigates a series of gallium arsenide bismide device layers using low-temperature, power-dependent photoluminescence measurements. The results show that the growth temperature and bismuth beam equivalent pressure have significant effects on the localized state distributions, emission linewidths, and device properties. It is concluded that bismuth-rich surface conditions during growth are preferable for achieving the narrowest emission linewidths with this material. Furthermore, the study demonstrates how the growth mode of a gallium arsenide bismide layer can be inferred ex-situ from low-temperature photoluminescence measurements.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Condensed Matter
Ghulam Nabi, Muhammad Arshad Kamran, Waseem Raza, Mohsin Amjad, M. Bilal Tahir, N. R. Khalid, Muhammad Tanveer, Nafisa Malik, Raheel Yousaf
Summary: The successful incorporation of dysprosium ions into CdS nanostructures resulted in the formation of ferromagnetism, which can tune the optical and magnetic properties for potential applications in optical devices and spintronics.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Ahmed M. Bolbol, Omar H. Abd-Elkader, Hassan Elshimy, Zaki I. Zaki, Salah A. Shata, M. Kamel, Ahmed S. Radwan, Nasser Y. Mostafa
Summary: In this study, dense thin films of TiO2 and TiO2 doped with Zr4+ were prepared using spin coating on glass substrate and characterized. The results showed that doping Zr4+ can change the optical and crystalline structure properties of TiO2, with higher doping concentration leading to lower band gap energy, slight lattice enlargement, and smaller crystal size. Additionally, the doped films exhibited typical photoluminescence in the visible spectrum region and had a lower rate of electron-hole recombination.
RESULTS IN PHYSICS
(2022)
