Article
Energy & Fuels
M. F. Al-Kuhaili
Summary: Multilayer thin films are used as functional coatings in various applications, such as transparent conducting electrodes and infrared-blocking energy-saving coatings. This study investigated the properties of WO3/Ag/WO3 multilayer coatings, which were optimized to meet the requirements of both applications. The results showed that these coatings exhibited high electrical conductivity, visible transmittance, and infrared-blocking performance.
Article
Engineering, Multidisciplinary
Yaelim Hwang, Haena Yim, Kwanyoung Oh, Jiseul Park, Sohee Kim, Ho-Won Jang, Ji-Won Choi
Summary: Silicon nitride-based electrodes (SiNx) have been proposed as candidates for high-capacity transparent anode electrodes, but their low electrical conductivity limits their application in thin film batteries. To overcome this, we introduced uniformly dispersed Ag nanoparticles in SiNx thin film to enhance electrochemical properties without affecting transmittance. The addition of Ag increased the capacity of the thin-film battery and allowed for higher C rates, while maintaining optical transmittance over 60% in the visible range.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Siqi Qu, Jing Guan, Dongqi Cai, Qianshuo Wang, Xiuyun Wang, Wei Song, Wei Ji
Summary: Electrochemical surface-enhanced Raman scattering (EC-SERS) spectroscopy is an ultrasensitive technique that provides mechanistic and dynamic information on electrochemical interfaces at the molecular level. This study developed a reliable EC-SERS substrate for studying molecular dynamics at electrochemical interfaces. The results not only provide new insights into the chemical mechanism of SERS, but also into the hot-electron transfer mechanism in metal-semiconductor heterostructures.
Article
Materials Science, Multidisciplinary
Pattarapon Pooyodying, Jung-Woo Ok, Young-ho Son, Youl-Moon Sung
Summary: This study investigated the electrical and optical properties of an electrochromic device with molybdenum-doped tungsten trioxide electrode. The results showed that the WO3:Mo film prepared under specific RF power conditions exhibited the highest coloration efficiency and sensitivity among the tested samples.
Article
Immunology
Yong Jun Park, Deokyeon Lee, Kwang-Mo Kang, Sumin Choi, Minkyung Shin, Seung Ho Han, Il Heo, Ho Seong Jang, Yoon-Chae Nah, Dong Hun Kim
Summary: This article investigates the properties of Ag nanoparticle-incorporated electrochromic WO3 thin films. The films with higher Ag concentration showed merged particles and a single or polycrystalline phase, while films with lower Ag concentration had a random distribution of small nanoparticles. Surface plasmon resonance peaks in the absorption spectra confirmed the formation of metallic nanoparticles. The W0.91Ag0.09O3-delta thin film exhibited faster switching time, higher coloration efficiency, and black coloration, indicating the achievement of color neutrality through Ag nanoparticle incorporation.
INTERNATIONAL IMMUNOPHARMACOLOGY
(2023)
Article
Materials Science, Ceramics
Zhongzhou Xie, Zhonghao Li, Hao Lu, Ying Wang, Yongsheng Liu
Summary: A method for synthesizing freestanding GdBa2Cu3O7-x thin films with high current carrying capacity was reported, where a water-soluble sacrificial layer of Sr3Al2O6 was grown on a LaAlO3 substrate and etched to obtain the freestanding film with a critical current density of 0.65 MA/cm(2) at 30K. This successful preparation expands the application of superconducting films.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
M. Zubkins, V. Vibornijs, E. Strods, I. Aulika, A. Zajakina, A. Sarakovskis, K. Kundzins, K. Korotkaja, Z. Rudevica, E. Letko, J. Purans
Summary: This paper reports the improved stability of WO3/Cu/WO3 coatings deposited by magnetron sputtering on glass and polyethylene terephthalate substrates. The stability issues due to Cu oxidation and migration can be addressed by adjusting the deposition parameters. Additionally, the antimicrobial properties of these coatings are revealed.
SURFACES AND INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Qiaonan Han, Rui Wang, Hongbing Zhu, Meixiu Wan, Yaohua Mai
Summary: Reactively sputtered molybdenum trioxide thin films were studied and used as cathodic electrochromic layers in all thin film electrochromic devices. The working pressure was found to significantly influence the performance of MoO3 films, with a 4 Pa MoO3 film exhibiting high optical modulation and coloration efficiency.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Chemistry, Physical
Rui Wang, Han Lin, Hongbing Zhu, Meixiu Wan, Kai Shen, Yaohua Mai
Summary: In this study, nickel oxide (NiOx) thin films were reactively sputtered at different working pressures for flexible all-thin-film electrochromic devices (ATF-ECDs) application. The working pressure significantly influenced the properties of reactively sputtered NiOx thin films, including deposition rate, grain structure, morphology, chemical composition, optical properties, and electrochemical properties. The ATF-ECDs with >= 2 Pa NiOx thin films exhibited high optical modulation and fast response time during electrochromic processes. The detailed electrochromic mechanism was discussed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Condensed Matter
G. V. Ashok Reddy, Habibuddin Shaik, K. Naveen Kumar, Hitha D. Shetty, R. Imran Jafri, Ramachandra Naik, Jyothi Gupta, Sheik Abdul Sattar, B. H. Doreswamy
Summary: In this study, cerium oxide nanorods were synthesized using a hydrothermal technique and a thin layer of tungsten trioxide (WO3) was deposited on the nanorods using DC magnetron sputtering. The electrochromic studies showed that the prepared thin films exhibited high coloration efficiency. SEM, UV-Visible, XRD, and electrochemical analyzer were used to investigate the surface morphology, optical properties, composition, and electrochromic performance of the thin films. The combination of CeO2 nanorods and WO3 coating shows potential for applications in electrochromic devices.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
K. Pandurangarao, V. Chitti Babu, V. Ravi Kumar
Summary: Tungsten oxide thin films with titanium dopant were deposited using reactive dc-magnetron sputtering at different temperatures and oxygen partial pressures. The study investigated the effect of titanium and deposition parameters on the morphological and electrochromic properties of the films. The morphology of the films changed with the deposition parameters, with the presence of titanium increasing the grain size. The films exhibited excellent electrochromic properties, with coloration efficiency ranging from 31.8 cm2/C to 101.70 cm2/C.
Article
Chemistry, Physical
Pritam J. Morankar, Rutuja U. Amate, Ganesh T. Chavan, Aviraj M. Teli, Dhanaji S. Dalavi, Chan-Wook Jeon
Summary: Electrochromic (EC) smart windows with large areas, low cost, durability, and multi-functionality were developed using potentiostatically electrodeposited WO3 thin films. The fabricated EC device showed high optical modulation, excellent Li-ion diffusion coefficient, and reversible performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Tien-Chai Lin, Bai-Jhong Jheng, Hui-Min Yen, Wen-Chang Huang
Summary: In this study, a vanadium pentoxide (V2O5) thin film was transformed from an amorphous to polycrystalline structure through thermal annealing, resulting in improved electrochromic properties. The annealed V2O5 thin film exhibited higher charge capacity and transparent difference.
Article
Chemistry, Physical
Soo-Won Choi, Ji-Woo Seo, Yonghun Kim, Pungkeun Song, Jung-Dae Kwon
Summary: This study investigates the fabrication of transparent hydrogenated amorphous silicon solar cells for building-integrated photovoltaic (BIPV) windows using a p-type window layer of molybdenum oxide (MoOx). By reactive sputtering, the MoOx layer is prepared with different oxygen flow ratios, and it is found that MoOx with an oxygen flow ratio of 0.09 improves the photovoltaic performance by reducing carrier recombination and parasitic absorption. Furthermore, the cell is optimized by introducing a MoOx bilayer, leading to enhanced power conversion efficiency through improved hole transfer and boosted open circuit voltage. To realize the application of BIPV windows, a monolithic connected solar module is manufactured using the laser scribing process, with a cell-to-module loss of approximately 22.9%. This is due to the residual MoOx remaining after the P2 scribing process, which deteriorates the series resistance.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Energy & Fuels
Yingming Zhao, Xiang Zhang, Wenjie Li, Zitong Li, Hulin Zhang, Mingjun Chen, Wenhai Sun, Yingjun Xiao, Jiupeng Zhao, Yao Li
Summary: A controllable crystalline structure WO3 film was prepared by adjusting the power in a magnetron sputtering deposition process. The film combined the advantages of excellent cyclic stability from highly ordered structure WO3 and fast response and satisfactory coloration efficiency from highly disordered structure WO3. The adjusted WO3 sputtered film exhibited superior electrochromic properties, and an all-solid-state electrochromic device based on this film showed excellent performance.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Chemistry, Multidisciplinary
Yi Yin, Haoyu Zhu, Tao Wu, Pengkun Liao, Changyong Lan, Chun Li
Summary: A bistable electrochromic (EC) device that can transform between transparent, mirror, and black states based on reversible metal Ag electrodeposition is achieved by introducing surface modification and ionic liquids (IL) to enhance long-term memory performance.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Yunlu Lian, Jiayue Han, Ming Yang, Silu Peng, Chaoyi Zhang, Chao Han, Xingchao Zhang, Xianchao Liu, Hongxi Zhou, Yang Wang, Changyong Lan, Jun Gou, Yadong Jiang, Yulong Liao, He Yu, Jun Wang
Summary: This study proposes a novel strategy for fabricating bi-directional photoresponse devices based on PtSe2-x films. By tuning the ratio of PtSe2 in the film, the direction of the photocurrent can be reversibly modulated in a broadband range, and the polarity switching wavelength from NPC to PPC can be further modulated. The tunable bi-directional photoresponse enables the device to mimic the fundamental functions of artificial synapses.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Dengji Li, You Meng, Yuxuan Zhang, Pengshan Xie, Zixin Zeng, Wei Wang, Zhengxun Lai, Weijun Wang, Sai-Wing Tsang, Fei Wang, Chuntai Liu, Changyong Lan, SenPo Yip, Johnny C. Ho
Summary: The surface of low-dimensional perovskites is crucial for determining their intrinsic properties, and understanding their characteristics and the influence of specific surfaces is valuable for designing functional surface-engineered structures. Surface passivation can also be used to stabilize and optimize perovskite-based optoelectronics. In this study, cesium lead bromide (CsPbBr3) microwire parallel arrays with specific (100)-terminated crystal planes were fabricated, showing excellent photodetection performance and long-term environment stability (>3000 h). It was found that environmental oxygen can passivate Br-vacancy-related trap states on the (100) surface and create charge carrier nanochannels to enhance the (opto)electronic properties. The coupling effects between oxygen species and the specific terminated crystal planes of perovskites highlight the importance of surface engineering for designing and optimizing perovskite-based devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Physics, Applied
Yao Nie, Haoen Ma, Zheng Wang, Changyong Lan, Wei Zhang, Leiming Chen, Chuanfu Huang
Summary: In this paper, cobalt was chosen as the doping element for BiFeO3 (BFO), and a series of BiFe1-x Co (x) O-3 (x = 0.03, 0.05, 0.07, 0.09) nanoparticles were successfully prepared and investigated. The doping of cobalt in BFO resulted in a competing structure between rhombohedral and orthorhombic structures. The photocatalytic degradation of Rhodamine B was studied, and 7BFCO was found to be the optimal proportion for achieving high photocatalytic efficiency. The underlying physics based on lattice structure, size effects, and energy gap was also discussed.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Rui Zhang, Qiusong Zhang, Xinyu Jia, Shaofeng Wen, Haolun Wu, Yimin Gong, Yi Yin, Changyong Lan, Chun Li
Summary: In this work, a low-temperature synthesis method for large-area polycrystalline PdSe2 films on silicon substrate was presented, and their charge carrier transport behaviors were investigated. The results showed that the film thickness has a significant impact on the device performance, with thinner films exhibiting a record high on/off ratio and thicker films exhibiting the highest reported hole mobility for polycrystalline films.
Article
Multidisciplinary Sciences
You Meng, Xiaocui Li, Xiaolin Kang, Wanpeng Li, Wei Wang, Zhengxun Lai, Weijun Wang, Quan Quan, Xiuming Bu, SenPo Yip, Pengshan Xie, Dong Chen, Dengji Li, Fei Wang, Chi-Fung Yeung, Changyong Lan, Chuntai Liu, Lifan Shen, Yang Lu, Furong Chen, Chun-Yuen Wong, Johnny C. Ho
Summary: The authors explore the unique multi-scale van der Waals interactions in one-dimensional tellurium systems to overcome the restrictions imposed by chemical bonds. They succeed in synthesizing wafer-scale van der Waals nanomeshes composed of self-welding Te nanowires on various substrates at a low temperature, which exhibit improved transport and photoelectric properties. These Te vdWs nanomesh electronics hold great promise in meeting emerging technological demands.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Rui Zhang, Zhuojun Yang, Liwen Liu, Jie Lin, Shaofeng Wen, You Meng, Yi Yin, Changyong Lan, Chun Li, Yong Liu, Johnny C. Ho
Summary: This study reports highly sensitive, broadband, and flexible PdSe2 thin film photodetectors on PI substrates that can detect light from UV to infrared regions. The devices with thick PdSe2 films exhibit good performance, with a responsivity of 37.6 mA W-1 at 1550 nm and a fast response time. The thin PdSe2 film shows both positive and negative photoresponses in the infrared region, and the negative photoresponse in the UV to VIS region is attributed to charge transfer-related adsorption-desorption of gas molecules.
ADVANCED OPTICAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Yiyang Wei, Changyong Lan, Shuren Zhou, Chun Li
Summary: This review provides an overview of the recent advancements in photodetectors based on 2D material/Si heterojunctions, including the background and motivation, key performance metrics, recent progress, and future prospects.
APPLIED SCIENCES-BASEL
(2023)
Article
Nanoscience & Nanotechnology
Shaofeng Wen, Rui Zhang, Zhuojun Yang, Shuren Zhou, Yimin Gong, Haodong Fan, Yi Yin, Changyong Lan, Chun Li, Yong Liu
Summary: This study demonstrates the tunable temperature coefficient of resistance (TCR) in palladium diselenide (PdSe2) nanosheet-based field effect transistors (FETs) through gate voltage modulation, and also shows the potential application of PdSe2 nanosheet-based FETs as bolometric photodetectors.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Rui Zhang, Jie Lin, Tao He, Jiafang Wu, Zhuojun Yang, Liwen Liu, Shaofeng Wen, Yimin Gong, Haifeng Lv, Jing Zhang, Yi Yin, Fangjia Li, Changyong Lan, Chun Li
Summary: This study presents a high-performance piezoresistive strain sensor that utilizes PdSe2 films grown directly on polyimide substrates to achieve outstanding strain-sensing capability and stability. The sensor can measure various physiological parameters in health care monitoring and use deep learning technology to achieve intelligent recognition of arterial temperature. The PdSe2 film sensor has the advantages of low-temperature fabrication and a simple device structure, making it promising for wearable electronics and health care sensing systems.
Article
Materials Science, Multidisciplinary
Shuren Zhou, Haodong Fan, Shaofeng Wen, Rui Zhang, Yi Yin, Changyong Lan, Chun Li, Yong Liu
Summary: Photodetectors based on pyramidal black-Si/graphene heterojunctions exhibit high responsivity and broadband characteristics, with a potential for significant gain compared to other structures.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Changyong Lan, Xinyu Jia, Yiyang Wei, Rui Zhang, Shaofeng Wen, Chun Li, Yi Yin, Johnny C. Ho
Summary: The reliable synthesis of two-dimensional materials is crucial for their practical applications. This study investigates the synthesis of WS2 assisted by Na2WO4 and reveals the critical factors in manipulating the morphology and properties of the WS2 products. The findings demonstrate a highly controllable synthesis method and provide possibilities for exploring technological applications of monolayer WS2.
MATERIALS ADVANCES
(2023)