Article
Chemistry, Physical
Naveen Kumar, Umme Farva, Malkeshkumar Patel, Wu-Shin Cha, Jaehyeong Lee, Joondong Kim
Summary: In this study, a novel, eco-friendly sputtergrown p-n heterojunction thin-film device utilizing n-Ga2O3 and p-SnS was proposed and investigated for transparent photovoltaic (TPV) applications. By optimizing the thickness of Ga2O3 thin-film, the device achieved high photocurrent density and open-circuit voltage, demonstrating excellent photovoltaic performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Vedaste Uwihoreye, Zhenni Yang, Jia-Ye Zhang, Yu-Mei Lin, Xuan Liang, Lu Yang, Kelvin H. L. Zhang
Summary: In this study, Ta-doped SnO2 thin films were fabricated via a low-cost sol-gel spin coating method, achieving high electrical conductivity and high optical transparency. The optical bandgaps of the films increased due to Ta doping, however, a bandgap shrinkage was also observed due to many-body interactions. These films exhibit both transparency and conductivity, providing a new platform for optoelectronic and solar cell applications.
SCIENCE CHINA-MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
P. Shayeghi Sabzevar, M. M. Bagheri-Mohagheghi, A. Shirpay
Summary: In this study, SnO2: rGO compound thin films were prepared on glass substrates by spray pyrolysis method. The effects of reduced graphene oxide and annealing with hydrazine as a reducing agent on the structural, electrical, and optical properties of these films were investigated. It was found that the addition of reduced graphene oxide and annealing under hydrazine led to the formation of SnO2 phase, increased peak intensity, and improved electrical properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Nanoscience & Nanotechnology
Eliana M. F. Vieira, Jose P. B. Silva, Katerina Veltruska, Cosmin M. Istrate, Veniero Lenzi, Vanira Trifiletti, Bruno Lorenzi, Vladimir Matolin, Corneliu Ghica, Luis Marques, Oliver Fenwick, Luis M. Goncalves
Summary: This work presents an all-oxide p-n junction thermoelectric generator composed of low-cost, abundant, and nontoxic materials, demonstrating high quality p-n junction and achieving good power output at a temperature difference of 160 K.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Carmen Lazau, Mircea Nicolaescu, Corina Orha, Viorel Serban, Cornelia Bandas
Summary: A self-powered photodetector with FTO/n-TiO2/p-CuMnO2 configuration was successfully fabricated and characterized. The device exhibited high sensitivity and performed well in both self-powered mode and biased mode.
Article
Materials Science, Multidisciplinary
Angang Song, Yiwen Wang, Suxiang Liu, Qinpu Wang, Junhua Hu
Summary: In this study, niobium-doped SnO2 transparent conductive oxides were deposited on glass substrates using remote plasma sputtering at ambient temperature without annealing. The films were characterized using advanced techniques and it was found that oxygen defects significantly affected their transparent conductivity. Crystalline films had higher resistivities due to decreased oxygen vacancies, while amorphous films exhibited remarkable conductivity.
Article
Chemistry, Physical
Akhmed K. Akhmedov, Aslan Kh. Abduev, Eldar K. Murliev, Victor V. Belyaev, Abil Sh. Asvarov
Summary: It is possible to fabricate indium zinc oxide (IZO) films with a wide range of optoelectronic properties by using different oxygen contents in the working gas during sputtering deposition. Additionally, high deposition temperature is not necessary to achieve excellent transparent electrode quality in the IZO films. By modulating the oxygen content in the working gas during RF sputtering, IZO-based multilayers were deposited, consisting of ultrathin IZO unit layers with high electron mobility alternating with layers characterized by high concentration of free electrons. Through optimizing the thicknesses of each unit layer, low-temperature 400 nm thick IZO multilayers with excellent transparent electrode quality were obtained, exhibiting low sheet resistance, high transmittance in the visible range, and a very flat multilayer surface.
Article
Materials Science, Multidisciplinary
Catalin Vitelaru, Anca C. Parau, Adrian E. Kiss, Iulian Pana, Mihaela Dinu, Lidia R. Constantin, Alina Vladescu, Lavinia E. Tonofrei, Cristina S. Adochite, Sarah Costinas, Liliana Rogozea, Mihaela Badea, Mihaela E. Idomir
Summary: This study introduces a transparent film with silver as the main antimicrobial agent for disinfection on screen protectors. Titanium dioxide and silicon dioxide are used as transparent matrix to embed silver nanoparticles, and the silver amount is controlled through different sputtering techniques. The film's structure and antimicrobial properties are confirmed through surface analysis and spectroscopic testing.
Article
Chemistry, Physical
Alexander Axelevitch
Summary: Transparent conductive oxide (TCO) thin films, such as indium-tin oxide (ITO), are widely used in micro- and optoelectronics, with dynamic hot-probe measurement system being one method to extract the main parameters of the films. This method, demonstrated on commercial ITO films and ZnO:Al layers, can also be applied to other wide-bandgap semiconductors.
Article
Engineering, Electrical & Electronic
Alessandro Tonon, Enrico Di Russo, Francesco Sgarbossa, Luca Bacci, Nicola Argiolas, Carlo Scian, Yurii P. Ivanov, Giorgio Divitini, Brendan Sheehan, Davide De Salvador, Andrea Gasparotto, Vittorio Morandi, Ray Duffy, Enrico Napolitani
Summary: This study aimed to directly produce large-scale crystalline 2H-MoS2 films on a SiO2-on-Si substrate through nanosecond pulsed laser annealing. The film structure, composition, and morphology were monitored using various techniques, such as Raman spectroscopy, X-ray diffraction, Rutherford backscattered spectroscopy, scanning transmission electron microscopy, and atomic force microscopy. The electrical properties of the film with optimized crystallinity were investigated by depositing Cr/Au contacts using shadow masks. This approach can be applied to other TMDs materials and substrates, enabling the fabrication of heterostructures and electrical devices on a single substrate.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Chemistry, Physical
Christina M. Chang, Luke M. Davis, Eliza K. Spear, Roy G. Gordon
Summary: Copper halides are high-mobility p-type transparent conductors, suitable for thin film optoelectronic devices. Researchers have developed a new CVD method to prepare CuBr thin films, opening up the possibility of a general route for CVD of other metal halides.
CHEMISTRY OF MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Michael Cholines Pedapudi, Jay Chandra Dhar
Summary: The effects of annealing on the performance of GLAD synthesized vertical p-NiO/n-beta-Ga2O3 heterostructure nanowire arrays based UV photodetector were investigated. The analysis showed that the sample annealed at 800 degrees C exhibited improved crystallinity and reduced defect levels, resulting in the largest responsivity and fast response speed. However, above 800 degrees C, crystallographic defects were formed, degrading the sample's performance.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Alexis Harmon, Darnell Robertson, Mehran Elahi, Bijandra Kumar, Adetayo Adedeji
Summary: The amorphous ternary tantalum silicon nitride (Ta-Si-N) has been found to be a suitable candidate for opto-electronic device applications due to its transparency and passivity to the thermochromic property of VO2 films and high oxidation temperature for vanadium.
MRS COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Sreeram Sundaresh, Akash Hari Bharath, Kalpathy B. Sundaram
Summary: The deposition of CuCrO2 thin films using a dual-target RF magnetron sputtering technique and subsequent annealing resulted in significant changes in the electrical, optical, structural, and morphological properties. XRD and XPS analyses confirmed the presence of phase pure CuCrO2 and the oxidation state of Cu in the films. SEM analysis showed the promotion of nanocrystalline growth with increasing annealing temperature. Optical studies revealed a decrease in optical transmission and bandgap as the temperature increased. Transparent heterojunction diodes based on p-type CuCrO2 and n-type ITO showed promising electrical characteristics.
Article
Materials Science, Multidisciplinary
Ebitha Eqbal, E. I. Anila
Summary: In this study, P-type copper doped tin oxide thin films were successfully prepared using chemical spray pyrolysis method and their properties were further investigated. Transparent homojunction diodes fabricated using this method demonstrated potential applications.
Article
Chemistry, Physical
Yunhui Wu, Jiurong Li, Xiujian Zhao, Xiao Gong
Summary: In this study, nickel-doped carbon dots (Ni-CDs) with tunable fluorescence emission were successfully synthesized using a simple one-step solvothermal method. The introduction of Ni enhanced the fluorescence intensity and caused a redshift. By mixing Ni-CDs with polyvinylpyrrolidone (PVP), the self-quenching effect of solid-state fluorescence was effectively avoided. Based on this, high-performance green, yellow, and red light-emitting diodes (LEDs) were constructed, demonstrating the potential of these carbon dots for solid-state lighting applications.
Article
Physics, Applied
Baoshun Liu, Xiujian Zhao
Summary: VO2-based thermochromic smart glazes have attracted attention for energy-saving buildings. Multi-layer film assemblies are used to increase visible luminous transmittance and solar light modulation efficiency. This research proposed an automatic optimization method to improve T-lum and ?T-sol, and analyzed the physical reasons behind high T-lum and ?T-sol. The results are meaningful for the design of multi-layer film assemblies according to user's demands.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Zhilin Li, Qiaoqiao Li, Mengyan Cao, Liujiang Zhou, Xiujian Zhao, Xiao Gong
Summary: Metal halide perovskite materials have attracted attention for lighting applications due to their unique optoelectronic properties. However, their complex preparation processes and toxicity of lead restrict their practical use. This study reports Sb3+ and Bi3+ doping of 0D (NH4)2SnCl6 perovskite powders, which exhibit wide emission peaks at different wavelengths with high photoluminescence quantum yield (PLQY). The mechanisms of the doping effects are proposed based on experimental and theoretical analysis. Both Sb3+ and Bi3+ dopings enhance the air and thermal stability of 0D (NH4)2SnCl6 perovskites, showing great potential for solid-state lighting.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Fang Yan, Jiurong Li, Xiujian Zhao, Xiao Gong
Summary: Multicolor fluorescent carbon dots with unconventional luminescence behavior were prepared using o-, m-, or p-phenylenediamine (o-PD, m-PD, or p-PD) and 2,3-dihydroxynaphthalene as reaction precursors. The fluorescence emission of the synthesized carbon dots followed a rule of o-PD to m-PD to p-PD from blue to red, contrary to most previously reported results. The differences in the polymerization, surface states, functional groups, and graphite N content of the carbon dots were identified as the main reasons for the unconventional luminescence behavior. These multicolor carbon dots have promising applications in LED lighting and anticounterfeiting fields.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Qiufen Liu, Xuelei Chen, Jiahao Wu, Liming Zhang, Guanjie He, Shouqin Tian, Xiujian Zhao
Summary: In this paper, amorphous ZIF-8 was modified with carboxyl functional groups (H3BTC-ZIF-8) to load organic fluorescent dyes (R6G and C151) and prepare R6G/C151/H3BTC-ZIF-8 composite films. The enhanced fluorescence properties were attributed to the increased interactions between the dyes and H3BTC-ZIF-8, which reduced the ACQ effect and resulted in a white-light-emitting composite film with high photoluminescence quantum yield (PLQY). This strategy provides guidance for the development of white-light-emissive materials.
Article
Chemistry, Multidisciplinary
Zhilin Li, Qiaoqiao Li, Mengyan Cao, Zhihui Rao, Xinyu Shi, Liujiang Zhou, Xiujian Zhao, Xiao Gong
Summary: In this study, Sb3+-doped Cs2ZrCl6 crystals with excellent optical properties and stability were successfully synthesized. The crystals exhibited blue and orange-red emissions under 254 nm and 365 nm light, respectively, attributed to the presence of [ZrCl6]2- and [SbCl6]3- octahedra. The Cs2ZrCl6:xSb(3+) crystals with a PLQY of up to 52.5% showed potential for white light-emitting diode (WLED) fabrication.
Article
Nanoscience & Nanotechnology
Yongfei Hu, Hao Dong, Arnauld Robert Tapa, Javad Shamsi, Javad Shabani Shayeh, Albert Trokourey, Baoshun Liu, Xiujian Zhao, Yi Xie
Summary: In this study, a facile and scalable NaBr-assisted room-temperature aqueous phase procedure was developed for the synthesis of all-inorganic CsPbBr3-embedded PbBr(OH) with controlled hierarchical structures, excellent ambient stability, and strong activity for photocatalytic degradation of dyes in simulated organic wastewater. The CsPbBr3-embedded PbBr(OH) photocatalysts exhibited excellent photocatalytic activity for dye degradation under visible-light irradiation, surpassing that of commercial TiO2 and other perovskite-based materials. This work provides insights into the green synthesis of ultra-stable perovskite-based nanomaterials for photocatalytic degradation of organic pollutants and other promising water treatment technologies.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Environmental
Tingfeng Ma, Bin Li, Shouqin Tian, Jiachen Qian, Longxiao Zhou, Qiufen Liu, Baoshun Liu, Xiujian Zhao, Gopinathan Sankar
Summary: W18O49 shows strong Localized Surface Plasmon Resonance (LSPR) effect and unique oxygen-deficient structure, making it widely used in photothermal application and photocatalyst. The photochromic feature of W18O49 has seldom been studied due to the challenge of exploring its features in the saturated colored state. However, the researchers found that the bleached W18O49 obtained by mild-heating the synthesized blue W18O49 nanoparticles in air had considerable reversible photochromic feature, which has great potential in energy-saving smart windows application.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Yuzhou Hu, Ying Ye, Wenchao Zhang, Kai Li, Yao Zhou, Yudong Zhang, Zhao Deng, Jianjun Han, Xiujian Zhao, Chao Liu
Summary: Precise and efficient patterning of light-emitting structures in high resolution and full-color light-emitting diodes is achieved by light-induced inverted patterning of nanocrystals in glasses for micro-light-emitting diodes. This method involves the use of ultrafast laser pulse to induce structural destruction and amorphization of nanocrystals in glasses, resulting in inverted luminescent patterns. The high-throughput patterning of micrometer-scale, thermally stable, and highly photoluminescent structures in nanocrystals embedded glass provides a novel way to fabricate high-performance and ultrahigh-resolution color conversion layers for micrometer-scale light-emitting diodes.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Jiurong Li, Jiancang Chen, Xiujian Zhao, Alberto Vomiero, Xiao Gong
Summary: Organosilane-grafted carbon dots (Si-CDs) were synthesized by hydrothermal method and can be uniformly dispersed in polyvinyl alcohol (PVA) matrix. Si-CDs/PVA thin-film LSCs exhibit excellent absorption in the UV spectral region and about 90% transmission in the visible range, with high stability and power conversion efficiency (PCE).
Article
Chemistry, Physical
Wenhao Zhao, Liping Wen, Ivan P. Parkin, Xiujian Zhao, Baoshun Liu
Summary: In this study, the Fermi-level (E-F) shift of the UV-illuminated Ag/TiO2 system under gaseous conditions was evaluated using in situ photoconductance and theoretical analysis. The role of Ag nanoparticles in storing and separating electrons was discussed, and it was found that the E-F of Ag/TiO2 is located deeper in the gap and is less affected by temperature compared to undecorated TiO2. The analysis showed that approximately 46 electrons can be stored in 10 nm Ag nanoparticles under the experimental conditions, and the blue-shift of localized surface plasmon resonance (LSPR) in Ag nanoparticles is not related to electron storage.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Ling Li, Yuwei Zhong, Yongfei Hu, Jilin Bai, Fen Qiao, Abdelaal S. A. Ahmed, Ghafar Ali, Xiujian Zhao, Yi Xie
Summary: This study develops a facile room-temperature approach for the synthesis of environmentally friendly all-inorganic orange-red-emitting Ag-doped and Mn-doped lead-free halide double perovskite Cs2NaBiCl6 (CNBC) in the shape of an octahedron. Both Ag and Mn doping heavily enhance the photoluminescence intensity of the CNBC samples, and their stability is studied under various conditions. The photocatalytic performances of the samples are investigated, demonstrating a strong and stable photodegradation activity. This work provides a facile and cost-effective protocol for doped lead-free double perovskites as stable and environmentally friendly alternative photocatalysts.
Article
Chemistry, Multidisciplinary
Zhihui Rao, Zhilin Li, Xiujian Zhao, Xiao Gong
Summary: A targeted high-precision luminescence thermometer was designed using a lead-free double perovskite platform by selecting multiple thermally coupled levels (TCLs) of the Er3+ ion. By choosing different TCLs in a single system platform, more precise temperature resolution can be obtained in different temperature regions from 100 K to almost 880 K. This work provides a quantitative guideline for the development of the next generation of temperature sensor based on trivalent erbium ions.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Mengyan Cao, Xiujian Zhao, Xiao Gong
Summary: Luminescent solar concentrators (LSCs) are semi-transparent windows that generate electricity from sunlight absorption. Despite their potential for building-integrated photovoltaics (BIPV), the current power conversion efficiency (PCE) of LSCs is still very low, limiting their practical applications. This Perspective summarizes and reviews the latest developments in LSCs, focusing on the future possibilities of higher PCE, large-scale production, and durability. It promotes the use of uniform testing standards and addresses the need for industrial development, toxicity concerns, and durability issues. A critical assessment of the field is provided, followed by discussions on challenges and solutions.
Article
Chemistry, Inorganic & Nuclear
Shiyu Ma, Jilin Bai, Li Sun, Lihong Zhao, Hao Tan, Lifeng Liu, Zhigang Peng, Xiujian Zhao, Dehua Xiong
Summary: This work successfully synthesized CuCoO2 nanosheets and regulated their crystal size by adding PEG and using a solvothermal route. The Ni@CCO2 electrode exhibited outstanding OER performance in 1.0 M KOH electrolyte, with good structural and compositional stability.
DALTON TRANSACTIONS
(2023)