Article
Energy & Fuels
Salma Zouhair, Bin Luo, Dmitry Bogachuk, David Martineau, Lukas Wagner, Adil Chahboun, Stefan W. Glunz, Andreas Hinsch
Summary: This study found that high fill factors of up to 78.8% can be achieved through hole selective layer-free carbon-electrode perovskite solar cells. Non-radiative recombination contributes only 3% to the fill factor losses in optimized devices, while interface series resistance losses are identified as the main loss channel.
Article
Physics, Applied
Yuhuan Meng, Benjamin R. Magruder, Hugh W. Hillhouse
Summary: This study identifies the main loss mechanisms of BiI3 solar cells in both n-i-p and p-i-n architectures, showing that p-i-n devices have higher efficiency than n-i-p devices, and proposes lithium doping as a method to enhance the performance of BiI3 solar cells.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Energy & Fuels
Gaia M. N. Javier, Priya Dwivedi, Yoann Buratti, Ivan Perez-Wurfl, Thorsten Trupke, Ziv Hameiri
Summary: This study evaluates and enhances the accuracy of commonly used expressions for the fill factor (FF), and investigates parameters that can affect the accuracy of the revised expressions. The empirical coefficients of the commonly used analytical expressions are recalculated using a modified fitting approach. While the predictions of the revised expressions match the results of theoretical simulations, discrepancies are observed when compared to actual measurements. The study explores the different impacts of unaccounted factors in the expressions, and suggests adjusting the ideality factor or considering edge recombination to improve the accuracy of predictions. Additionally, the expressions may slightly overestimate the FF of cells with non-uniform implied open-circuit voltage distribution. The findings of this study can be helpful in developing techniques for extracting FF from luminescence images of industrial solar cells as electrical parameter extraction methods from such images continue to improve.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Review
Chemistry, Multidisciplinary
Chunhui Liu, Jinfeng Liu, Xiaopeng Duan, Yanming Sun
Summary: The development of environmentally friendly processes for high-performance OSCs is crucial. Recent studies have focused on using non-chlorinated solvents to dissolve Y-series acceptor-based photoactive layers, enabling green fabrication. This comprehensive review provides an overview of recent progress in green-processed OSCs based on Y-series acceptors, inspiring researchers to develop new ideas and approaches in this important field.
Article
Chemistry, Physical
Joseph K. Kirui, Solomon Akin Olaleru, Lordwell Jhamba, Daniel Wamwangi, Kittessa Roro, Adam Shnier, Rudolph Erasmus, Bonex Mwakikunga
Summary: This study focused on the charge transfer process and interfacial recombination within the n-i-p architecture of solar cell devices, and found that charge loss in PSCs is mainly dependent on the configuration of the cells and layer morphology.
Article
Chemistry, Physical
Kevin J. J. Rietwyk, Xiongfeng Lin, Boer R. Tan, Tharindu Warnakula, Philippe Holzhey, Boya Zhao, Siqi Deng, Maciej A. A. Surmiak, Jacek Jasieniak, Udo Bach
Summary: Time-dependent Suns-V-OC and Suns-photoluminescence analysis were used to study two different structures of back-contact perovskite solar cells. The presence of a mesoporous TiO2 layer was found to reduce recombination and increase the open-circuit voltage. 2D time-dependent drift-diffusion simulations were able to explain the experimental results and revealed the significant impact of non-uniform ion distribution on the photoluminescence intensity and ideality factor.
ADVANCED ENERGY MATERIALS
(2023)
Article
Multidisciplinary Sciences
Victor-Tapio Rangel-Kuoppa
Summary: This article proposes two iterative cycles for accurately determining the parameters of solar cells and compares them with common parameter extraction methods.
Article
Energy & Fuels
Saeid Asgharizadeh, Saeid Khesali Azadi
Summary: Two-dimensional MXenes have promising applications in perovskite solar cells, as they can improve the photovoltaic efficiency by tuning the work function. The addition of MXene to the absorber layer reduces bulk recombination, while adding MXene to the ETL and ETL/absorber interface reduces interface recombination. Higher nid values are desirable in MXene cells and correlate with better cell performance.
Article
Multidisciplinary Sciences
Victor-Tapio Rangel-Kuoppa
Summary: This Part 2 of the series focuses on the application of iterative cycles to determine the parameters of solar cells in experimental current voltage and current density curves. The author explores various measured points per voltage and discusses the effects on IV curves and solar panels, revealing their applicability in different voltage ranges.
Article
Physics, Applied
Kohei Watanabe, Shigeo Asahi, Yaxing Zhu, Takashi Kita
Summary: The modulation doping technique allows for control of the efficiency of the photoabsorption process in TPU solar cells. The upconversion process induced by infrared light can significantly increase the external quantum efficiency and contribute to the boost in open-circuit voltage.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Energy & Fuels
Abasifreke Ebong, Donald Intal, Sandra Huneycutt, Thad Druffel, Ruvini Dharmadasa, Kevin Elmer, Apolo Nambo
Summary: This study demonstrates the successful metallization of a PERC silicon solar cell using screen-printable copper (Cu) paste. The Cu paste contains antioxidant additives and diffusion inhibitors to prevent oxidation and diffusion of Cu. The Cu-printed cells achieved an efficiency of 19% and showed no Cu diffusion after characterization tests. The long-term stability and effectiveness of the Cu diffusion barrier were also confirmed.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Chemistry, Multidisciplinary
Sohyeon Kim, Jun Hyeok Jang, Ziang Wu, Mi Jung Lee, Han Young Woo, Inchan Hwang
Summary: The study investigates the correlation of n(id), PL characteristics, and V-oc in triple-cation mixed-halide perovskite depending on interfacial crystal quality. It highlights the importance of evaluating interfacial crystal quality for understanding charge recombination and device optimization.
Article
Materials Science, Multidisciplinary
Youkyung Seo, Inyeob Na, Yeeun Kim, Heeyoung Chae, Kilhwan Oh, Joonyoung Yang, Sooyoung Yoon, Min-Kyu Joo
Summary: A simple and effective methodology is proposed to determine the contact resistance (RCT) and characteristic trap energy (ET) of OLEDs simultaneously, showing high feasibility and accuracy. The method was applied to study the degradation mechanism of a blue OLED, revealing different degradation patterns of the metal-to-transport layer interface and emission layer.
ORGANIC ELECTRONICS
(2021)
Article
Energy & Fuels
Sung-Tae Kim, Ho-Jung Jeong, Ye-Chan Kim, Vishwa Bhatt, Manjeet Kumar, Ju-Hyung Yun, Jae-Hyung Jang
Summary: A bi-layer molybdenum structure was used as the back contact layer in CIGS solar cells to control the doping of Na ions to the CIGS layer, resulting in improved junction quality and performance of the cells.
Article
Chemistry, Multidisciplinary
Priyabrata Sadhukhan, Dibyendu Ghosh, Payal Sengupta, Sayan Bhattacharyya, Sachindranath Das
Summary: In this study, a room temperature mechanochemical synthesis technique was used to fabricate organic-inorganic hybrid perovskite solar cells with improved performance compared to chemically synthesized cells. Analysis of charge transport and defects in the devices confirmed lower defect density in mechanochemically synthesized perovskite materials. The study also revealed the dominant role of polarization-assisted recombination mechanism in the overall charge transport mechanism.
Article
Physics, Applied
Navneet Kumar, Ashish Kumar, Fakir Chand
Summary: GaN single crystal samples were cleaned and passivated with ruthenium solution. Photoluminescence and scanning tunneling spectroscopy were used to characterize the passivated surface. Significant changes were found in I-V and dI/dV measurements after surface treatment, indicating modification in surface electronic properties. The ruthenium passivation improved the GaN interface, as demonstrated by the improved device characteristics of Ni/GaN Schottky diodes.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Bhavani Chakravarti, Anand Prakash Mishra, Rajan Kumar Singh
Summary: This study compares the luminescence characteristics of SmVO4 and Dy3+-doped SmVO4 and synthesizes these new phosphors using the hydrothermal approach. Characterization techniques including powder X-ray diffraction, FTIR, TEM and SEM/EDX, photoluminescence techniques, Raman spectroscopy, and UV-visible diffuse reflectance spectroscopy are used. The results show that the synthesized products have a tetragonal crystalline phase and regular bipyramidal structures. The photoluminescence emission spectra suggest that the emission intensity varies with the amount of Dy3+ ion dopants, but the locations of emission bands remain nearly identical due to energy transfer between dysprosium and samarium ions. The optimal concentration of Dy3+ ion doping for improving the photoluminescence properties is determined to be 5 at%. The energy band gaps of the samples are calculated and their estimated CIE chromaticity colour coordinates are (0.43, 0.54) for SmVO4:5 at% Dy3+.
Article
Engineering, Electrical & Electronic
Bhavani Chakravarti, Anand Prakash Mishra, Rajan Kumar Singh
Summary: The luminescence properties of YVO4:Dy3+ were modified by co-doping alkali metals (M = Li, Na, and K). Co-doped materials were prepared by hydrothermal technique followed by calcination. The properties of crystal phase and photoluminescence were affected by the co-doping of alkali metals. The most intense emission peak was observed at 573 nm, and K+ effectively enhanced its intensity. The optimum concentration of K+ co-doping was found to be 10 at.%. The calculated band gaps and CIE chromaticity color coordinates indicate the potential application of YVO4:Dy3+ in display devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Sandeep Pandey, Mayank Pathak, Manoj Karakoti, Gaurav Tatrari, Boddepalli Shantibhusan, Pawan Singh Dhapola, Sunil Dhali, Anurag Srivastava, Sravendra Rana, Nanda Gopal Sahoo
Summary: This study presents a novel approach to fabricate free-standing thin films of multiwalled carbon nanotubes (MWCNTs)/graphene oxide (GO) nanohybrids using a solvent-antisolvent system. The synthesis of GO and MWCNTs/GO nanohybrids was achieved through specific methods. The growth of the thin film relied on surface-tension-driven phenomena caused by solvent-antisolvent interfacial tension. Additionally, DFT-based simulations revealed excellent quantum capacitance in MWCNT/GO nanohybrids, leading to the development of binder-free supercapacitor devices with impressive electrochemical performance.
Article
Pharmacology & Pharmacy
Monika Matiyani, Anita Rana, Neha Karki, Kamal Garwal, Mintu Pal, Nanda Gopal Sahoo
Summary: Cancer is a serious global threat to human health caused by uncontrolled proliferation of malignant cells. Traditional cancer treatments have adverse side effects and high mortality rates, so novel drug delivery systems are urgently needed.
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2023)
Article
Pharmacology & Pharmacy
Monika Matiyani, Anita Rana, Mintu Pal, Sumit Dokwal, Nanda Gopal Sahoo
Summary: The aim of this study was to investigate the potential of poly(amido amine) (PAMAM) dendrimer decorated graphene oxide (GO) based nanocarrier for targeted delivery of a hydrophobic anticancer drug, quercetin (QSR). The results showed that GO-PAMAM exhibited a higher loading capacity for QSR compared to GO, and the synthesized nanocarrier was found to be biocompatible for HEK 293T cells with a high cytotoxic effect observed on MDA MB 231 cells for QSR-loaded GO-PAMAM.
JOURNAL OF PHARMACY AND PHARMACOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Anita Rana, Sandeep Pandey, Monika Matiyani, Himani Tiwari, Pushpa Bhakuni Negi, Sumit Dokwal, Nanda Gopal Sahoo
Summary: In this paper, a green synthesis of nitrogen-doped graphene oxide nanosheets (N-GONSs) from Juniperus squamata roots was reported. These nanosheets exhibited cytotoxic potential against HeLa cells and Plasmodium falciparum. The N-GONSs were synthesized using hydrothermal process without any chemical modification, and they showed high fluorescence under short wavelength. The viabilities of HeLa cancer cells for N-GONSs were 76.47%, 43.98%, and 20.55% after 24 h, 48 h, and 72 h, respectively, at the concentration of 50 μg/mL. Furthermore, N-GONSs exhibited moderate antimalarial activity with IC50 PF3D7 of 45 μg/mL.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Saurabh Singh, Shubham Singh, Bhuvanesh Srinivasan, Ashish Kumar, Nitinkumar Bijewar, Takao Mori, Tsunehiro Takeuchi, Jean-Francois Halet
Summary: The structural, electronic, thermal, and lattice thermal transport properties of hypothetical quaternary Heusler alloys FeRuTiX (X=Si, Ge, Sn) were investigated using first-principles calculations. The compounds were found to be semiconducting with a small indirect band gap. The presence of flat bands near the conduction band edge and degenerate multi-bands near the valence band edge indicates potential for large Seebeck coefficients and good electrical conductivity. FeRuTiSn was identified as a promising candidate for high-temperature thermoelectric applications due to its low lattice thermal conductivity and suitable electronic structure.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2023)
Article
Materials Science, Multidisciplinary
Shyam Narayan Singh Yadav, Chintam Hanmandlu, Dinesh Kumar Patel, Rajan Kumar Singh, Chun-Yen Chen, Yen-Yu Wang, Chih-Wei Chu, Chi-Te Liang, Chih-Ting Lin, Yu-Jung Lu, Ta-Jen Yen
Summary: The combination of MAPbBr(3) PQDs, graphene (Gr), and morphologically controlled plasmonic gold nanocrystals (AuNCs) results in a superior photodetector with a record-breaking responsivity, detectivity, and external quantum efficiency.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Composites
Bhashkar Singh Bohra, Poonam Singh, Anita Rana, Harsh Sharma, Tanuja Arya, Mayank Pathak, Alok Chaurasia, Sravendra Rana, Nanda Gopal Sahoo
Summary: This study utilized covalent functionalization to modify graphene oxide (GO) with 4-aminophenyl disulfide (4-AFD) for the development of vitrimer epoxy nanocomposites. The functionalization of GO was confirmed through FT-IR, Raman, and XRD analyses, as well as TEM and elemental analysis. The dispersion of GO and FGO inside the polymer matrix was examined using FE-SEM, showing improved dispersion due to the functionalization of GO.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Navneet Kumar, F. Chand, Ratnesh Pandey, Ranjeet K. Brajpuriya, Ramcharan Meena, K. Asokan, D. Kanjilal, Ashish Kumar
Summary: Pt/n-GaN Schottky diodes were fabricated on metal organic chemical vapor deposition grown epitaxial GaN thin films. Temperature-dependent electrical characterizations were performed and barrier inhomogeneity calculations were made. The devices were then irradiated with 100 MeV oxygen ions and the changes in their electrical properties were measured. The results showed an increase in the Schottky barrier height and ideality factor, as well as a decrease in carrier concentrations, with an increase in ion fluence.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Composites
Tanuja Arya, Bhashkar Singh Bohra, Chetna Tewari, Sunil Dhali, Vishwesh Dikshit, Sravendra Rana, Yong Chae Jung, Nanda Gopal Sahoo
Summary: The present study describes an environmentally friendly and economically feasible method for synthesizing graphene oxide (GO) using agricultural waste, specifically oak fruit. The resulting agricultural waste-derived GO (AGO) is used as a reinforcing filler in the production of poly(vinyl alcohol) (PVA) polymer nanocomposites. The addition of AGO significantly improves the mechanical and thermal properties of PVA, making it a promising material for structural applications.
POLYMER COMPOSITES
(2023)
Review
Chemistry, Multidisciplinary
Sandeep Pandey, Manoj Karakoti, Dinesh Bhardwaj, Gaurav Tatrari, Richa Sharma, Lata Pandey, Man-Jong Lee, Nanda Gopal Sahoo
Summary: Carbon-based nanomaterials have shown great potential for energy conversion applications, especially in the fabrication of perovskite-based solar cells. However, these cells still lag behind silicon-based solar cells in terms of stability and durability. Therefore, the use of carbon-based materials as cost-effective and stable alternatives for the fabrication of solar cells is crucial for their commercialization.
NANOSCALE ADVANCES
(2023)
Review
Chemistry, Multidisciplinary
Mayank Pathak, Diksha Bhatt, Rajesh Chandra Bhatt, Bhashkar Singh Bohra, Gaurav Tatrari, Sravendra Rana, Mahesh Chandra Arya, Nanda Gopal Sahoo
Summary: This paper provides a succinct summary of current developments in the construction of supercapacitors (SCs) with high energy density. It emphasizes and explores innovative applicable methodologies from the perspectives of electrolytes, electrodes, and device modification. The combination of novel electrode materials/composites and electrolytes, along with fabrication design, significantly enhances the electrochemical performance and energy density of SCs.
