Article
Engineering, Environmental
Mahyar Mohammadnezhad, Gurpreet Singh Selopal, Ozge Cavuslar, David Barba, Emek G. Durmusoglu, Havva Yagci Acar, Zhming M. Wang, Gregory P. Lopinski, Barry Stansfield, Haiguang Zhao, Federico Rosei
Summary: The study presents a method to enhance the performance of DSSCs by preparing a nanocomposite of functional gold nanoparticles and multiwall carbon nanotubes, which are embedded in mesoporous TiO2 films as photoanodes. The use of this nanocomposite resulted in a significant improvement in power conversion efficiency and short-circuit photocurrent density compared to control cells based on TiO2 alone. Additionally, DSSCs utilizing the TiO2/AuNP/MWCNT photoanode exhibited remarkable stability, retaining 92% of the initial power conversion efficiency value after continuous illumination for ten days.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Varishetty Madhu Mohan, Kenji Murakam, Madhavi Jonnalagadda, V. R. Machavaram
Summary: Pure TiO2 and surface-modified TiO2 films were developed using spray pyrolysis technique, with similar crystal structure and optical absorption properties. However, the addition of ZnO layer in SMT films increased impedance and hindered reverse electron transmission. Thus, the efficiency of DSSCs improved from 8.25% to 9.3%.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Hafiz Muhammad Asif Javed, Wenxiu Que, Muhammad Shahid, Akbar Ali Qureshi, M. Afzaal, M. Salman Mustafa, Shahid Hussain, Abdullah Saad Alsubaie, Khaled H. Mahmoud, Zeinhom M. El-Bahy, Ling Bing Kong
Summary: The research investigated the effects of anodization parameters on the growth behavior and top morphology of TiO2 nanotubes. Different TiO2 nanostructures were obtained through electrochemical anodization of Ti foil by varying parameters, and dye sensitized solar cells based on TiO2 nanohexagons showed the highest power conversion efficiency. The efficiency of DSSC was further enhanced through modifications of TiO2 nanohexagons with TiO2 nanoparticles derived from TiCl4.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Physical
R. Sasikala, M. Kandasamy, S. Suresh, V Ragavendran, V Sasirekha, J. M. Pearce, S. Murugesan, J. Mayandi
Summary: In this study, Ag-SrTiO3NC nanocomposites with varying weight percentages of Ag nanoparticles were synthesized, characterized, and integrated into dye-sensitized solar cells (DSSCs). The Ag-SrTiO3 NC photoanode loaded with 2.5 wt% Ag NPs exhibited enhanced photovoltaic performance in DSSCs, attributed to factors such as high dye loading, improvement in visible light harvesting, and fast photo-induced electron transfer caused by the plasmonic Ag NPs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Li-Syuan Chen, Manik Chandra Sil, Cheng-Chung Chang, Chih-Ming Chen
Summary: The use of anodization to modify titanium can enhance the efficiency of dye-sensitized solar cells by constructing TiO2 nanotube structures. The incorporation of N719 dye and D-Dye further improves cell efficiency, with the spatial effect of D-Dye molecules playing a key role in suppressing molecular aggregation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Chemistry, Multidisciplinary
Ana Belen Munoz-Garcia, Iacopo Benesperi, Gerrit Boschloo, Javier J. Concepcion, Jared H. Delcamp, Elizabeth A. Gibson, Gerald J. Meyer, Michele Pavone, Henrik Pettersson, Anders Hagfeldt, Marina Freitag
Summary: Dye-sensitized solar cells (DSCs) and dye-sensitized photoelectrochemical cells (DSPECs) have seen a revival in recent years as they offer unique properties such as low cost, non-toxic materials, colorfulness, transparency, and efficiency in low light conditions. This review covers advancements in DSC technology over the past decade, including theoretical studies, characterization techniques, materials, applications, and commercialization efforts by various companies.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Materials Science, Multidisciplinary
Anees Ur Rehman, Najeeb Ullah, Muhammad Abid Saeed, Usman Khan Khalil
Summary: In this study, the concept of localized surface plasmon resonance was used to enhance the absorption efficiency of dye-sensitive solar cells. Different shapes of aluminum nanoparticles were investigated, and a three-dimensional model was developed using COMSOL Multiphysics. The results showed that aluminum nanoparticles with spherical, rod and triangle morphologies had higher absorption capability compared to aluminum-free nanoparticles. Additionally, the use of core-shell Al@SiO2 nanoparticles in a bilayer photoanode nanostructure demonstrated improved absorption performance.
Article
Multidisciplinary Sciences
Brishty Deb Choudhury, Chen Lin, Sk Md Ali Zaker Shawon, Javier Soliz-Martinez, Hasina Huq, Mohammed Jasim Uddin
Summary: The study presents an improved photoanode with hierarchical microstructure of photoactive TiO2, along with the deposition of plasmonic nanoparticle Ag using photoreduction method. The branched structure of the photoanode increases dye loading, while Ag nanoparticles play multiple roles in enhancing light-to-current conversion efficiency. This novel design shows remarkably higher photon conversion efficiency compared to traditional structures.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
Govind Sharma, Chandan Dawo, Komal Mulchandani, Uttam K. Kumawat, R. K. Singhal, Chhagan Lal
Summary: Impedance and modulus spectroscopy were used to study the charge carrier dynamics of N719 dye-sensitized solar cells (DSSC). Significant changes were observed in the low-frequency regime under both light-off and illumination conditions. The N719 DSSC exhibited high performance with a JSC of 10.89 mA/cm2, a VOC of 0.672 V, a fill-factor of 0.65, and a photoconversion efficiency of 4.81%. The Nyquist plots showed small arcs at higher frequencies and large arcs at lower frequencies, indicating deviation from ideal Debye relaxation. The dielectric relaxation followed the interfacial polarization of Maxwell-Wagner type, possibly due to grain boundary effects. Comparative analysis revealed localized carrier relaxation in this N719 DSSC, correlated with conductivity hopping process.
Article
Materials Science, Coatings & Films
Philipp G. Gruetzmacher, Michael Schranz, Chia-Jui Hsu, Johannes Bernardi, Andreas Steiger-Thirsfeld, Lars Hensgen, Manel Rodriguez Ripoll, Carsten Gachot
Summary: The power conversion efficiency (PCE) of PEB and PUB as sensitizers of dye-sensitized solar cells is investigated using first-principles calculations. Different adsorption models are constructed for PEB/PUB on the TiO2 surface, and their geometrical configurations and electronic properties are optimized. The obtained PCEs confirm the credibility of the current method and predict that PUB and PEB are promising candidate sensitizers for dye-sensitized solar cells.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Daniel Ursu, Radu Banica, Melinda Vajda, Corneliu Birtok Baneasa, Marinela Miclau
Summary: In this study, one-dimensional silver nanowires were integrated into zinc tin oxide spheres through one-step hydrothermal synthesis to enhance the photovoltaic performance of dye-sensitized solar cells. Experimental results demonstrated that the addition of silver nanowires can enhance the photoelectrochemical activity and charge injection.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Chemical
Juan Zhang, Jung Keun Cha, Xiuting Luo, Eun Ji Cho, Ji Hoon Kim, Soo Hyung Kim
Summary: This study aims to enhance the rapid manufacturing of high-efficiency dye-sensitized solar cells (DSSCs). By using an aerosol impactor, the adsorption of dyes on TiO2 nanoparticles is accelerated, and the photovoltaic characteristics of DSSCs are improved by assembling photoelectrodes with bilayered TiO2 thin films.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Yogendra Nath Chouryal, Rahul Kumar Sharma, Neeraj Tomar, Neelam Yadav, Heera Lal Kewat, Ishfaq Abdullah Wani, Sandeep Nigam, Praveen Kumar Surolia, Sri Sivakumar, Pushpal Ghosh
Summary: This study reports on the synthesis of phase pure, cubic BaGdF5:Er/Yb-doped nanocrystals using ionic liquids, which can be used as an absorption layer in dye-sensitized solar cells (DSSCs) to enhance solar energy conversion efficiency. Bright-green and red emissions were observed from the nanoparticles. The DSSCs with BaGdF5:Er3+(1%)/Yb3+(10%)/TiO2 absorption layer achieved the highest photon conversion efficiency of 7.75% and current density of 15.9 mA/cm2, showing a significant enhancement compared to those with only TiO2 layer.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Fengjuan Miao, Fuchen Chu, Bingcheng Sun, Bairui Tao, Peng Zhang, Yu Zang, Paul K. Chu
Summary: This study presents the design and fabrication of a photoanode composed of Au/SnS/TiO2 sensitized with natural dye for dye-sensitized solar cells (DSSCs). By calcination, a layer of spherical nano-TiO2 is prepared, and a layer of nano-SnS is deposited on the TiO2 photoanode using the continuous ion layer adsorption reaction (SILAR). The sensitized Au nanoparticles exhibit enhanced localized surface plasmon resonance (LSPR) effects and electron trapping ability, resulting in improved electron mobility and reduced electron recombination in the DSSC.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Multidisciplinary
Jacqueline M. Cole, Ulrich F. J. Mayer
Summary: This feature article discusses the fundamental use of materials-characterization methods in determining the structural information of the dye-TiO2 interface in dye-sensitized solar cells (DSCs). It introduces various techniques for obtaining specific structural information on the interface, such as dye anchoring, dye aggregation, and molecular dye orientation. The article emphasizes the importance of acquiring such information for DSC design guidelines and the validation process of design-to-device pipelines.
Review
Chemistry, Multidisciplinary
Guo Liang Goh, Shweta Agarwala, Wai Yee Yeong
ADVANCED MATERIALS INTERFACES
(2019)
Article
Engineering, Mechanical
Vishwesh Dikshit, Arun Prasanth Nagalingam, Guo Dong Goh, Shweta Agarwala, Wai Yee Yeong, Jun Wei
Summary: In this study, fiber reinforced sandwich structures were fabricated using fused filament fabrication and Inkjet printing techniques, and their quasi-static indentation properties were investigated. Acoustic emission signals were monitored during the indentation testing, and micro-computed tomography analysis was performed to identify failure points and damage propagation. The results showed that sinusoidal sandwich structures had the highest load-bearing capacity and energy absorption capacity, with dominant damage mechanisms being fiber pullout and core shear.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Guo Liang Goh, Shweta Agarwala, Wai Yee Yeong
ACS APPLIED MATERIALS & INTERFACES
(2019)
News Item
Materials Science, Multidisciplinary
B. V. R. Chowdari, Shweta Agarwala
Article
Polymer Science
Hamed Abdolmaleki, Shweta Agarwala
Review
Chemistry, Multidisciplinary
Horned Abdolmaleki, Preben Kidmose, Shweta Agarwala
Summary: Printed electronics is a promising technology that uses functional inks to print electrical components on various substrates, enabling the fabrication of flexible and form-fitting devices. Droplet-based printing technologies, utilizing nanomaterial inks, are of particular interest due to their high resolution and production flexibility. Research focuses on developing functional inks and creating physical sensors using these techniques.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Youssif Merhi, Pablo F. Betancur, Teresa S. Ripolles, Charlotte Suetta, Morten R. Brage-Andersen, Sofie K. Hansen, Anders Frydenlund, Jens Vinge Nygaard, Peter H. Mikkelsen, Pablo P. Boix, Shweta Agarwala
Summary: Muscle atrophy is a common problem caused by immobilization and critical illness, leading to rehabilitation difficulties and increased mortality. This study presents a solution for preserving muscle mass through the use of a customized biocompatible neuromuscular electrical stimulation (NMES) device. The integration of dry and biocompatible electrodes into a compressive stocking textile was demonstrated, resulting in extended usage without skin irritation. Electrochemical analysis showed improved performance of the printed electrodes compared to commercial ones, and promising results were obtained in a hospital setting for muscle atrophy evaluation.
Article
Polymer Science
Zuzanna J. Krysiak, Hamed Abdolmaleki, Shweta Agarwala, Urszula Stachewicz
Summary: This study investigates the applicability of electrospun membranes as potential substrates for printed electronics and demonstrates the good printability and conductivity of silver and carbon inks on flexible polyimide, poly(vinyl butyral-co-vinyl alcohol-co-vinyl acetate) and polystyrene electrospun membranes. Cytotoxicity tests indicate the possibility of using these printed electronics for various sensors and topical wearable devices.
Article
Chemistry, Multidisciplinary
Hamed Abdolmaleki, Astri Bjornetun Haugen, Kristian Birk Buhl, Kim Daasbjerg, Shweta Agarwala
Summary: An interfacial engineering approach using amine-functionalized graphene oxide (AGO) is proposed to enhance the electrical properties of fluoropolymers. This method enables the formation of beta-phase, enlargement of lamellae dimensions, and alignment of micro-dipoles. The resulting PVDF-TrFE films with AGO demonstrate exceptional remnant polarization and high voltage coefficient, energy density, and energy-harvesting figure of merit values, making them suitable for next-generation wearables and human-machine interfaces.
Editorial Material
Engineering, Chemical
Seeram Ramakrishna, Fanghua Li, Ewa Kijenska-Gawronska, Shweta Agarwala
Article
Engineering, Biomedical
Mick Iversen, Monisha Monisha, Shweta Agarwala
Summary: This study presents a low-cost, flexible patch sensor that can measure the change in pH and fluid content in a wound. By printing different electrodes on the skin, the sensor has high sensitivity and can be easily incorporated in a wound dressing.
INTERNATIONAL JOURNAL OF BIOPRINTING
(2022)
Review
Engineering, Biomedical
Shweta Agarwala
INTERNATIONAL JOURNAL OF BIOPRINTING
(2020)
Article
Automation & Control Systems
Hortense Le Ferrand, Sakineh Chabi, Shweta Agarwala
ADVANCED INTELLIGENT SYSTEMS
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Shweta Agarwala
2019 IEEE 9TH INTERNATIONAL NANOELECTRONICS CONFERENCES (INEC)
(2019)
Article
Chemistry, Multidisciplinary
Guo Liang Goh, Nitipon Saengchairat, Shweta Agarwala, Wai Yee Yeong, Tuan Tran
Article
Chemistry, Inorganic & Nuclear
Caleb J. Bennett, Helen E. A. Brand, Alexander K. L. Yuen, Maria K. Nicholas, Brendan J. Kennedy
Summary: The temperature dependence of the crystal structure of Potassium Hexaiodoplatinate(IV) between 80 and 500 K is studied. Different crystal structures are observed at different temperatures, including monoclinic, tetragonal, and cubic structures. Accurate determination of the structures of K2PtI6 is important for further theoretical and practical research.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Zhuo Zeng, Jiangfu Zheng, Xiaoming Li, Changzheng Fan, Rongying Zeng, Wenqing Tang
Summary: An efficient method for phosphate removal from wastewater is urgently needed due to the environmental issue caused by excessive phosphorus. In this study, calcium aluminum layered double hydroxides (CaAl-LDHs) and six amino acid intercalated calcium aluminum layered double hydroxides (CaAl-amino acid-LDHs) were prepared and compared for their phosphate adsorption performance. L-Aspartic acid intercalated calcium aluminum layered double hydroxides (CaAl-Asp-LDHs) exhibited the highest phosphate adsorption capacity and faster removal rate compared to CaAl-LDHs. The phosphate adsorption mechanism on CaAl-Asp-LDHs involved electrostatic attraction, hydrogen bonds, complexation, and ion exchange. This environmentally friendly material shows promising potential for efficient phosphate removal from aquatic environments.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Rouzbeh Aghaei Hakkak, Thomas Schleid
Summary: The novel guanidinium hydro-closo-borates with [BnHn]2- (n = 10 and 12) anions were successfully synthesized via direct reaction. The crystal structures exhibit hydrogen bonding interactions and have the potential to facilitate H2 generation.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Liqiang Ma, Pengpeng Wei, Jingfang Li, Liye Liang, Guangming Li
Summary: A novel catalyst, H4PVMo2W9O40@rht-MOF-1, was developed using a one-pot hydrothermal method. It exhibited high efficiency and reusability in esterification reactions.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Liudmila A. Gorelova, Valentiva A. Yukhno, Maria G. Krzhizhanovskaya, Oleg S. Vereshchagin
Summary: Two new Ga-Ge disordered feldspar-related compounds were successfully synthesized using melt crystallization methods. Their stability and thermal expansion properties were studied under high-temperature conditions. The results showed that both compounds are stable within the studied temperature range and exhibit anisotropic thermal expansion.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Seifeddine Bdey, Nesrine Boussadoune, Francois Allard, Jacques Huot, Gabriel Antonius, Noura Fakhar Bourguiba, Pedro Nunez
Summary: The structure of a novel arsenate compound Na3Al3(AsO4)4 has been determined using X-ray diffraction. The crystal exhibits a monoclinic space group with suitable pathways for Na+ ion migration. The accuracy of the structural model was confirmed using various validation tools and density functional theory calculations.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Amit Kumar Atri, Ujwal Manhas, Sumit Singh, Irfan Qadir, Shikha Sharma, Preteek Sharma, Devinder Singh
Summary: This study synthesizes new oxygen deficient triple layered Ruddlesden-Popper (RP) phases via sol-gel method and investigates the effects of Cr3+ doping on their structural, optical, magnetic, and photocatalytic properties. The experimental results demonstrate that Cr3+ doping alters the interactions and leads to excellent photocatalytic performance in some phases.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Dat Le Thanh, Amandine Guiet, Emmanuelle Suard, Romain Berthelot
Summary: In this study, FeNb11O29 powder samples were prepared using a microwave-assisted solid-state synthesis method for the first time. The samples obtained rapidly from submicrometric oxide precursors showed enhanced cycling performance, possibly due to the easier ionic diffusion occurring in the smaller particles.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Raimund Ziegler, Felix R. S. Purtscher, Thomas S. Hofer, Gunter Heymann, Hubert Huppertz
Summary: We have successfully synthesized a new tellurium borate crystal under high-pressure and high-temperature conditions. The crystal structure and theoretical calculations have been thoroughly discussed.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Subhendu Jana, Eric A. Gabilondo, Paul A. Maggard
Summary: This study reports the synthesis and characterization of two previously unknown multinary selenides, Ba8Hf2Se11(Se-2) and Ba9Hf3Se14(Se-2), which display unique structures and optoelectronic properties competitive with existing perovskite-type chalcogenides.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Fei Ruan, Chonggui Lei, Fenglong Zhang, Jinxiao Bao, Fen Zhou, Min Xie, Pengfei Xu, Jianquan Gao
Summary: Studying the diffusion properties of hydrogen is important for designing new proton conductors. In the past, the chemical diffusion coefficient of hydrogen in proton conductors was usually obtained through a manual calculation method, resulting in difficulty in controlling the calculation accuracy. To address this issue, a mathematical algorithm and C language computer program were developed to calculate the chemical diffusion coefficient based on Fick's second law and Romberg numerical integral. The algorithm showed high precision and powerful computing function, and has the potential to replace the manual calculation method in calculating the chemical diffusion coefficient for hydrogen in proton conductors.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Deepika Shanubhogue, Suraj Mangavati, Ashok Rao, Ru-Ting Tsao, Yung-Kang Kuo
Summary: In this study, the effect of Y doping at the Sn-site on the structural, electrical, and low-temperature thermoelectric properties of the Cu2SnSe3 system is investigated. Y-doped compounds Cu2Sn1-xYxSe3 show reduced electrical resistivity, enhanced power factor, and decreased thermal conductivity, resulting in higher ZT values.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Wei Hong, Min Qing, Xun He, Lei Wang, Yu Pu, Qiyu Li, Zhimin He, Qin Dong, Rong Li, Xinglong Gou
Summary: This study developed a simple method to prepare SnS2 nanosheets and assembled them with MXene to form SnS2/MXene. The composite material exhibited abundant active sites, superior electron/ion transfer kinetics, and a unique 2D interlayer structure, resulting in high specific capacity, outstanding rate capability, and excellent cycling stability, with potential applications in LIBs.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Heng-Yu Ruan, Xue-Qian Wu, Tian-Yu Zhang, Yi Yuan, Le Wang, Ya-Pan Wu, Qing-Wen Han, Ruan Chi, Dong-Sheng Li
Summary: Two isostructural metalorganic frameworks (MOFs), CTGU-36-Co and CTGU-36-Ni, were synthesized, and CTGU-36-Ni demonstrated high activity as a molecular electrocatalyst for the methanol oxidation reaction.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Rachid Fakhreddine, Ali Ouasri, Abderrahim Aatiq
Summary: This paper reports the synthesis, structure, and spectroscopic studies of three novel metal orthophosphate salts. The structures of these compounds were refined using X-ray powder diffraction data. The infrared and Raman analysis revealed their symmetries and the UV-visible investigation determined their optical properties.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
