Article
Green & Sustainable Science & Technology
Mamta, Y. Singh, K. K. Maurya, V. N. Singh
Summary: Sb2Se3, a p-type semiconductor, is widely used in thin film solar cells as an absorber layer. In this study, Sb2Se3 was prepared using the solid-state reaction route and thin films were deposited through thermal evaporation and annealing. The crystallinity of the thin films improved after annealing. The structural and optical properties of the material and thin films were characterized using XRD, Raman, SEM, and UV-Vis spectroscopy. A simple device structure was proposed and simulations based on Sb2Se3/c-Si hetero-junction photovoltaic cells were conducted. The simulations extracted parameters such as back contact work function, electron affinity, and layer thickness to optimize the device performance. The p-Sb2Se3 with a band gap of 1.64 eV achieved a maximum efficiency of 12.75% under optimized conditions. This simple device structure can have various local applications due to the availability of n-Si. It can also serve as a reliable method for predicting photovoltaic performance and exploring new tandem solar cell structures using Sb2Se3.
MATERIALS TODAY SUSTAINABILITY
(2022)
Article
Physics, Applied
Zhenwei Wang, Takahiro Kitada, Daiki Takatsuki, Jianbo Liang, Naoteru Shigekawa, Masataka Higashiwaki
Summary: In this study, p-Si/n-Ga2O3 and p(+)-Si/n-Ga2O3 heterostructures were fabricated using surface-activated bonding technique, and their electrical properties were investigated. Current density-voltage measurement before and after thermal annealing at 450 ? showed a significant increase in current density after annealing, which was attributed to thinning of the intermediate layer formed during the bonding process. Distinctive two-stage capacitance-voltage characteristics were observed for p-Si/n-Ga2O3 heterostructures, and numerical calculation considering the effect of two-dimensional electron gas formed at the heterointerface reproduced these characteristics well. These results indicate that Ga2O3-based p-n heterostructures with good interface properties and large-area uniformity can be fabricated using surface-activated bonding.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Dan Zhang, Chaochao Fu, Jing Xu, Chao Zhao, Jianfeng Gao, Yaodong Liu, Menghua Li, Junfeng Li, Wenwu Wang, Dapeng Chen, Tianchun Ye, Dongping Wu, Jun Luo
Summary: This paper discusses the method of using dopant segregation technique to adjust the Schottky barrier heights of NiSi/Si diodes, and presents a technique to distinguish different types of diodes.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Materials Science, Multidisciplinary
Shalini Srivastava, Shalini Singh, Vineet Kumar Singh
Summary: This study developed a model based on simulation studies to correlate the defect density and the performance of n-CdS/p-Si heterojunction solar cells. It was found that interface traps are more dominant in deteriorating the device performance than deep traps and shallow traps. The best efficiency determined through simulation in this study for n-CdS/p-Si heterojunction solar cell is 18.72%.
Article
Computer Science, Information Systems
Jasurbek Gulomov, Oussama Accouche, Rayimjon Aliev, Raymond Ghandour, Irodakhon Gulomova
Summary: This paper focuses on exploring new materials and structure to enhance the efficiency of solar cells, specifically by studying ZnO/Si and TiO2/Si heterojunction solar cells. The electrical and optical properties of ZnO and TiO2 were determined using different functionals in Density Functional Theory (DFT). It was found that TiO2 can be used as a transparent contact and ZnO as an emitter layer in a silicon-based solar cell.
Article
Chemistry, Multidisciplinary
Iulia Cojocariu, Matteo Jugovac, Sidra Sarwar, Jeff Rawson, Sergio Sanz, Paul Koegerler, Vitaliy Feyer, Claus Michael Schneider
Summary: This article explores the unique optoelectronic properties of organic p-n junctions in the field of molecular electronics by adjusting the fluorination level in metal-supported bilayered Pc-based structures, with potential application in photovoltaic devices.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Stefan W. Tabernig, Lin Yuan, Andrea Cordaro, Zhi Li Teh, Yijun Gao, Robert J. Patterson, Andreas Pusch, Shujuan Huang, Albert Polman
Summary: We have designed an optically resonant bulk heterojunction solar cell to study the optoelectronic properties of nanostructured p-n junctions. By optimizing the nanoscale pattern, we were able to improve the efficiency of the solar cell by enhancing the absorption and charge-carrier extraction behavior. Our experiments and simulations showed significant improvement in infrared response and current gain in the patterned solar cell compared to the planar reference, demonstrating the importance of nanostructured geometries in enhancing solar cell performance.
Article
Energy & Fuels
Sho Aonuki, Yudai Yamashita, Gianluca Limodio, Shunsuke Narita, Kaori Takayanagi, Ai Iwai, Kaoru Toko, Miro Zeman, Olindo Isabella, Takashi Suemasu
Summary: In this study, n-BaSi2 films were formed on p-Si substrates using ion implantation technique, and the solar-cell functionality of n-BaSi2/p-Si heterojunction was demonstrated under AM1.5 illumination. The results showed that the ion implantation damage could be recovered by postannealing, leading to high internal quantum efficiency.
PROGRESS IN PHOTOVOLTAICS
(2022)
Article
Physics, Multidisciplinary
Minchul Lee, Rosa Lopez, H. Q. Xu, Gloria Platero
Summary: The competition between Kondo correlation and superconductivity in quantum-dot Josephson junctions can drive a quantum phase transition between 0 and p junctions. By investigating the magnetic-field-driven phase transition in the Kondo regime, researchers found a unique feature in low-field magnetotransport that can be used to distinguish intermediate phases. The magnetic-field-driven p'-p transition was found to enhance the supercurrent, which is strongly related to the Kondo effect.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Dylan G. Boucher, Kara Kearney, Elif Ertekin, Michael J. Rose
Summary: The efficiency of photoelectrochemical (PEC) devices depends heavily on the energetics and band alignment of the semiconductor overlayer junction, which can be controlled through molecular functionalization. By covalently attaching aryl surface modifiers, high-fidelity surfaces with low defect densities were achieved, resulting in systematically shifted band edges and high photoelectrochemical performance. DFT calculations showed that the organic-functionalized interfaces effectively hybridized with the silicon band edges, introducing a positive interfacial dipole and decreasing the potential drop across the semiconductor.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Energy & Fuels
Abdelkader Aissat, Lynda Chenini, Said Nacer, Jean Perre Vilcot
Summary: This study is based on the modeling and simulation of GaAsPN/GaP quantum dot solar cells, revealing that this quaternary alloy is an ideal choice for growth on Si substrates and low-cost solar cell fabrication.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Materials Science, Ceramics
Mohammad -Reza Zamani-Meymian, Nima Naderi, Maryam Zareshahi
Summary: The present research investigated the effect of graphene layer and zinc oxide nanorods on the photovoltaic performance of ZnO thin film-based heterojunction solar cells. The results showed that the addition of graphene improved the photovoltaic properties, increasing the efficiency and fill factor of the solar cells.
CERAMICS INTERNATIONAL
(2022)
Article
Optics
Yating Wan, Chao Xiang, Joel Guo, Rosalyn Koscica, Mj Kennedy, Jennifer Selvidge, Zeyu Zhang, Lin Chang, Weiqiang Xie, Duanni Huang, Arthur C. Gossard, John E. Bowers
Summary: Significant improvements in III-V/Si epitaxy have propelled quantum dots (QDs) to the forefront of Si photonics, laying the foundation for efficient, scalable, and multifunctional integrated systems. This study details the design, fabrication, and characterization of a platform for efficient coupling of QD laser output to Si waveguides. Record-setting evanescent QD distributed feedback lasers on Si are reported, showcasing impressive performance metrics.
LASER & PHOTONICS REVIEWS
(2021)
Article
Energy & Fuels
Najla Alnami, Rahul Kumar, Andrian Kuchuk, Yurii Maidaniuk, Samir K. Saha, Alaa A. Alnami, Reem Alhelais, Alaa Kawagy, Morgan E. Ware, Yuriy Mazur, Gregory J. Salamo
Summary: The study investigated the impact of different quantum structures in the intrinsic region of a pin junction solar cell on optical and electrical properties, with the SML-QD sample showing superior performance. Deposition of 0.25 ML InAs was found to be optimal for solar cell application.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Engineering, Electrical & Electronic
Soghra Hosseini, Laya Dejam, Hossain Elahi
Summary: This study aimed to verify the effect of annealing temperature variation on zinc oxide doped with aluminum thin films. The results showed changes in structural, electrical, and optical properties of the thin films. The grain size increased and energy band gap shifted to a higher level with the increase in annealing temperature.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Pham Van Trinh, Nguyen Ngoc Anh, Ngo Thi Bac, Cao Tuan Anh, Nguyen Van Hao, Le Ha Chi, Bui Hung Thang, Nguyen Van Chuc, Phan Ngoc Minh, Naoki Fukata
Summary: This study investigated the fabrication and performance of hybrid solar cells using n-type silicon micro-pyramids and AuNPs. Results showed that the introduction of SiMPs and AuNPs significantly increased the power conversion efficiency of the solar cells, attributed to enhanced electrical conductivity and localized surface plasmon resonance of the PEDOT:PSS coating layer.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Engineering, Environmental
Ramin Hassandoost, Ahmed Kotb, Zahra Movafagh, Mohamed Esmat, Regis Guegan, Saki Endo, Wipakorn Jevasuwan, Naoki Fukata, Yoshiyuki Sugahara, Alireza Khataee, Yusuke Yamauchi, Yusuke Ide, Esmail Doustkhah
Summary: In this study, the effective use of a manganese cobaltite bimetallic spinel compound for sonocatalysis was demonstrated by successfully preparing three different morphologies of manganese cobaltite and achieving good degradation performance within a short period of time.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Clarisse Bloyet, Flavien Sciortino, Yoshitaka Matsushita, Paul A. Karr, Anuradha Liyanage, Wipakorn Jevasuwan, Naoki Fukata, Subrata Maji, Jan Hynek, Francis D'Souza, Lok Kumar Shrestha, Katsuhiko Ariga, Tomohiko Yamazaki, Naoto Shirahata, Jonathan P. Hill, Daniel T. Payne
Summary: A facile method for forming stable colloidal nanoparticles of O-1(2) photosensitizers, which exhibit aggregation enhanced O-1(2) generation, is reported. The study demonstrates the regulation of physical properties of the nanoparticles through molecular structure, and the ability of the particles to pass through cell membranes into the cytoplasm.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Yong-Lie Sun, Xiang-Dong Zheng, Wipakorn Jevasuwan, Naoki Fukata
Summary: The morphology, crystallinity, and internal stress of ZnO/Ge core-shell nanowires were investigated with different shell growth time and temperature. Ge nanotubes were fabricated and stress relaxation in Ge was achieved after removing the ZnO core using the wet-etching method.
Article
Chemistry, Multidisciplinary
Mohamed Esmat, Esmail Doustkhah, Mostafa Abdelbar, Rafat Tahawy, Hamza El-Hosainy, Mohamed Abdelhameed, Yusuke Ide, Naoki Fukata
Summary: This paper investigates the photocatalytic hydrogen production from ammonia-borane using CuO-loaded TiO2 nanosheets under visible light. The results show that CuO nanoparticles are converted to metallic Cu nanoparticles during the photocatalytic reaction, and they photocatalyze the reaction through their in situ-formed plasmonic features. The potential role of plasmonic Cu nanoparticles in promoting charge separation and enhancing photocatalytic performance is also studied.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Physics, Applied
Noboru Takamure, Laura Granados Caro, Naoki Fukata, Anita Ho-Baillie, David Robert McKenzie
Summary: This study evaluates the low-cost hermetic sealing performance of water glass on glass at low temperatures. Experimental results demonstrate that water glass exhibits good sealing performance and bonding strength.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Mohammed Abdelhameed, Mostafa F. Abdelbar, Mohamed Esmat, Wipakorn Jevasuwan, Naoki Fukata
Summary: This study investigates the hole-injection characteristics of dopant-free vanadium oxide (VOx) semiconductor thin films. The crystal structure of solution-processable VOx films changes with different annealing atmospheres. The VOx films show effective hole-injection properties due to their high work function, wide band gap, and presence of oxygen deficiencies. The vacuum-annealed VO2-x (B) film exhibits the best hole-injection ability. The use of VOx films as hole-injection layers has significant implications for the development of low-cost and durable electronics and optoelectronics devices.
Article
Materials Science, Multidisciplinary
Trinh Minh Hoan, Nguyen Van Toan, Nguyen Phu Hung, Pham Van Trinh, Tran Bao Trung, Doan Dinh Phuong
Summary: Permeability and capillary performance, which are important parameters for heat pipes, are affected by the particle size and geometry of copper powder. The porosity and capillary performance of sintered porous wicks made from different-sized spherical and dendritic Cu powders were studied. The results showed that both types of copper powder had higher porosity and capillary performance with larger particle size, due to increased connectivity between internal pores. The dendritic powder exhibited superior capillary efficiency and porosity compared to the spherical powder. A model was also proposed to predict the capillary performance and permeability of sintered porous copper.
Article
Chemistry, Multidisciplinary
Hui Song, Hengming Huang, Xianguang Meng, Qi Wang, Huilin Hu, Shengyao Wang, Hongwei Zhang, Wipakorn Jewasuwan, Naoki Fukata, Ningdong Feng, Jinhua Ye
Summary: Direct photocatalytic oxidation of methane to liquid oxygenated products at room temperature is achieved using atomically dispersed nickel anchored on a nitrogen-doped carbon/TiO2 composite (Ni-NC/TiO2) catalyst. The Ni-NC/TiO2 catalyst exhibits high activity and selectivity for the formation of Cl oxygenates, with a yield of 198 umol and a selectivity of 93% in 4 hours. The enhanced performance is attributed to the presence of single-atom Ni-NC sites that facilitate electron transfer and activate O2 to form reactive oxygen species.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Multidisciplinary
Anjali Saini, Mohammed Abdelhameed, Divya Rani, Wipakorn Jevasuwan, Naoki Fukata, Premshila Kumari, Sanjay K. Srivastava, Prathap Pathi, Arup Samanta, Mrinal Dutta
Summary: A new method of introducing nanopores with spongy morphology during fabrication of flexible silicon microwires (SiMWs) is presented. The size and porosity of the MWs can be controlled by varying the concentration of the etchant, oxidant, and surfactant, as well as the diameter of SiO2 microparticles and concentration of H2O2. The mechanism behind the formation of porous and flexible nature of the SiMWs is demonstrated.
Article
Chemistry, Multidisciplinary
Mandeep K. Chahal, Subrata Maji, Anuradha Liyanage, Yoshitaka Matsushita, Pelin Tozman, Daniel T. Payne, Wipakorn Jevasuwan, Naoki Fukata, Paul A. Karr, Jan Labuta, Lok Kumar Shrestha, Shinsuke Ishihara, Katsuhiko Ariga, Francis D'Souza, Genki Yoshikawa, Yusuke Yamauchi, Jonathan P. Hill
Summary: The researchers reported that a non-planar saddle-shaped N-heterocycle-fused metallo-porphyrinoid can directly form a persistent microporous crystalline material from solution, which can undergo solvent exchange without loss of microporosity. The material is formed by a unique accumulation of intermolecular interactions involving pi-pi stacking of the fused heterocycle, coordinative interactions at the metalloporphyrinoid unit, and hydrogen bonding. This intermolecular multipoint interaction concept will be key in the future molecular design for on-demand synthesis of porous materials, and the simple implementation of the compound described here indicates the excellent potential for device materials' synthesis. Sensing properties of the material incorporated into a nanomechanical sensor array are also reported.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Nguyen Van Hao, Do Hoang Tung, Nguyen Phu Hung, Vu Xuan Hoa, Ngo Thu Ha, Nguyen Thi Khanh Van, Pham The Tan, Pham Van Trinh
Summary: We developed a simple, fast, efficient, and environmentally friendly method for preparing silver nanoparticles (AgNPs) using the solution plasma method in the presence of Paramignya trimera (P. trimera) extracts. The effects of P. trimera extract concentrations and voltage on AgNPs formation were investigated. The prepared AgNPs exhibited good stability, strong antibacterial ability, and significant anticancer activity, suggesting their potential applications in various fields.
Article
Chemistry, Multidisciplinary
Nguyen Van Tu, Nguyen Ngoc Anh, Tran Van Hau, Nguyen Van Hao, Nguyen Thi Huyen, Bui Hung Thang, Phan Ngoc Minh, Nguyen Van Chuc, Naoki Fukata, Pham Van Trinh
Summary: A hybrid material of gold nanoparticle-decorated graphene oxide (GO-AuNP) was synthesized and used for transparent conductive film and organic/inorganic hybrid solar cells. The results showed that the GO-AuNP-based film had high transmittance, low sheet resistance, and improved power conversion efficiency of the solar cell.
Article
Chemistry, Multidisciplinary
Pham Van Trinh, Nguyen Ngoc Anh, Nguyen Thi Cham, Le Tuan Tu, Nguyen Van Hao, Bui Hung Thang, Nguyen Van Chuc, Cao Thi Thanh, Phan Ngoc Minh, Naoki Fukata
Summary: The effect of nanostructured silicon and gold nanoparticles on the efficiency of a hybrid solar cell was investigated. The results showed that using silicon nanowires on the surface can achieve the highest conversion efficiency, and adding gold nanoparticles can further improve the efficiency.
