Yatendra Singh
@mangalayatan.edu.in
Mangalayatan University
Scopus Publications
- A multi-parametric comparative study of Solar Cycles 23, 24, and 25 using solar and interplanetary disturbance indices
Munendra Singh, Y. P. Singh
Astrophysics and Space Science, 2026 - Short-term periods in the occurrence of ICME, HSS, CIR, and IP shock events in interplanetary space
Y.P. Singh, B. Badruddin
Journal of Atmospheric and Solar Terrestrial Physics, 2025 - Enhanced structural and optical properties of iron-doped silver sodium niobate perovskites: A lead-free alternative for optoelectronic applications
Meenu Rani, Y.P. Singh, Sanjeev Kumar, Kamal Kumar Kushwah, Shilpi Jindal
Ceramics International, 2025 - Synergistic effect of anthocyanin-rich Euphorbia milii dye and TiCl4-passivation on 1D TiO2-based DSSCs
Kumar Vaisno Srivastava, Anjesh Srivastava, Raj Kumar Maurya, Yatendra Pal Singh, Abhishek Srivastava
Next Materials, 2025
This study presents the development of eco-sustainable dye-sensitized solar cells (DSSCs) incorporating anthocyanin-rich Euphorbia milii flower (EMF) extract as a natural photosensitiser and hydrothermally synthesised one-dimensional TiO 2 nanorods (TNRs) as photoanodes. TNR photoanodes fabricated with varying hydrothermal durations (6, 8, and 10 h) were systematically evaluated. Among them, TNR 8 exhibited the highest power conversion efficiency (PCE) of 1.12 %, attributed to its optimized surface morphology, enhanced dye-loading capacity, and superior charge transport. The EMF dye demonstrated strong absorption in the 400–600 nm range and successfully anchored onto TNRs through -COOH and -OH functional groups, as confirmed by FTIR analysis. To further improve photovoltaic performance, TiCl 4 surface passivation was applied to the TNR 8 photoanode. This treatment resulted in a uniform TiO 2 overlayer that passivated surface trap states, enhanced crystallinity, and improved dye adsorption, collectively suppressing charge recombination and promoting efficient electron transport. Consequently, the passivated p- TNR 8 photoanode achieved a significantly enhanced PCE of 2.60 %, with a short-circuit current density (J SC ) of 17.24 mA cm −2 and an open-circuit voltage (V OC ) of 499 mV. The notable ∼132 % increase in efficiency is ascribed to reduced interfacial recombination resistance (R Ct : from 23.32 to 13.42 Ω·cm 2 ) and a red-shifted absorption onset (E g : from 3.07 to 3.02 eV) resulting from improved electronic interactions at the TiO 2 /dye interface. Compared to expensive commercial dyes such as N719 (> $1000/g), the EMF dye offers a low-cost (< $1/g), environmentally benign, and scalable alternative. These results demonstrate the practical viability of natural dye-sensitized DSSCs and highlight the significance of photoanode engineering and interfacial optimization in advancing green and affordable photovoltaic technologies for sustainable energy applications. Schematic summary of the eco-friendly DSSC development using anthocyanin-rich Euphorbia milii extracts and hydrothermally synthesised TiO 2 nanorods (TNR 6–10 ), highlighting the champion performance of the TiCl 4 -passivated TNR 8 photoanode with a peak PCE of 2.60 %. • One-dimensional TiO 2 nanorods (TNR 6-10 ) and TiCl 4 -passivated TNR 8 were explored as DSSC photoanodes. • Anthocyanin-rich Euphorbia Milii dyes (400-600 nm absorption) were used in FTO/TNR 6-10 /EMF/( I − / I 3 − )/carbon-DSSC fabrication. • TNR 8 -based DSSC achieved the highest PCE of 1.12%, with VOC of 545 mV and JSC of 4.70 mA cm -2 . • TiCl 4 -passivated TNR 8 photoanodes enhanced PCE to 2.60%, showing ~132% performance improvement. • TNR 6 and TNR 10 photoanodes delivered lower efficiencies of 0.26% and 0.59% due to poor charge transport. - Tailoring structural and electrical properties in cobalt-doped Ag0.2Na0.8NbO3 ceramics for advanced electronic applications
Meenu Rani, Y.P. Singh, Shristi Chaudhary, Shilpi Jindal
Materials Chemistry and Physics, 2025 - Frequency of Occurrence of Solar Plasma Disturbances in Interplanetary Space
Munendra Singh, Y. P. Singh
Research in Astronomy and Astrophysics, 2025
Major solar plasma disturbances are subjected to Lomb–Scargle periodogram and wavelet analysis to determine the occurrence frequency. These disruptions include interplanetary coronal mass ejection, sudden storm commencement, high-speed streams, corotating interaction regions, interplanetary shocks and Forbush decreases. We included information on all of the aforementioned solar disturbances for the last six solar cycles, from 1965 to 2023, for this study. Our findings reveal some intriguing and noteworthy results that clearly distinguish between even and odd-numbered solar cycles. The study suggests that the Sun behaves differently in odd and even-numbered solar cycles as it comes from the massive solar eruptions. During even-numbered solar cycles, variations with a period of ∼44 days are prominently observed in addition to solar rotation (∼27 days) and extended solar (∼36 days) rotation. However, in addition to solar rotation, prolonged solar rotation, and periods of around 44 days, we also detect a number of intermittent changes with nearly comparable amplitude during the odd-numbered solar cycles. The findings also demonstrate that, in contrast to odd-numbered solar cycles, the emissions rate of these disruptions is more distinct and predictable during even-numbered solar cycles. - 1D TiO2 photoanodes: a game-changer for high-efficiency dye-sensitized solar cells
Kumar Vaisno Srivastava, Pooja Srivastava, Akancha Srivastava, Raj Kumar Maurya, Yatendra Pal Singh, Abhishek Srivastava
Rsc Advances, 2025
A schematic illustrating the initial characteristics, phases, nanostructures, and potential future applications of 1D TiO2 photoanodes. - EMERGING FRONTIERS: HARNESSING THE POTENTIAL OF SMART MATERIALS
Meenu Rani, Y. P. Singh, Sheela Devi, Shilpi Jindal, Amit Kumar
Smart Materials and Applications, 2025
Smart materials belong to a class of materials which is enlisted in advanced materials. They are also known as intelligent materials. Smart materials are increasingly gaining popularity in modern society due to their crucial role and unique properties, surpassing traditional materials. These materials are capable of adapting to their environment by reacting intelligently to external stimuli. They can adjust to specific triggers and can be categorized in various ways, such as different types of responses to environmental stimuli including physical, chemical, and biological stimuli. Many smart materials, such as piezoelectric materials and shape memory alloys, are currently in 4use, with new discoveries expected as a result of ongoing intensive research and development efforts. Smart materials are utilized in a variety of sectors such as medical, robotics, nuclear power, military, aerospace technology, civil engineering, construction, general industries, biomedical industries, and seismic applications. These materials offer inherent properties such as sensing, information processing capabilities, control, and actuation, allowing for the creation of smart systems with multifunctional components. They are equipped with features like self-restoration, self-degradation, and self-diagnosis; thus enhancing their functionality. This chapter explores different types of smart materials with their properties and applications across various industries. - Investigation of the Structural, Microstructural and Optical Properties of Cobalt-Doped Silver Sodium Niobate Ceramics
Meenu Rani, Y. P. Singh, Sheela Devi, Shilpi Jindal
Journal of Electronic Materials, 2024 - Occurrence of sudden storm commencement in interplanetary space
Y.P. Singh, B. Badruddin, S. Agarwal
Advances in Space Research, 2024 - Study of short-term periodicities in the occurrence of Forbush decreases: wavelet analysis
Y. P. Singh, Badruddin
Astrophysics and Space Science, 2024 - Solar rotational period of cosmic rays and solar activity during the maximum phase of solar cycle 24
P R Singh, A I Saad Farid, Y P Singh, A K Singh, Ayman A Aly
Physica Scripta, 2021 - Solar Rotational Oscillation and Its Subharmonics in Solar Wind Plasma Field, Geomagnetic, and Cosmic Ray Intensity Indicator in the Solar Cycle 24/25 Minimum
Y. P. Singh
Earth and Space Science, 2020 - The 27-day periodicity and its sub harmonics
Y. P. Singh, Badruddin
Astrophysics and Space Science, 2019 - Study of the Solar Rotational Period and Its Harmonics in Solar Activity, Interplanetary, Geomagnetic, and Cosmic Ray Intensity Indicators During Solar Polarity Reversal Periods
Y. P. Singh, Badruddin
Solar Physics, 2019 - Short- and mid-term oscillations of solar, geomagnetic activity and cosmic-ray intensity during the last two solar magnetic cycles
Y.P. Singh, Badruddin
Planetary and Space Science, 2017 - Solar-rotational oscillation and its harmonics in the solar-wind, geomagnetic and cosmic ray particles during the last two solar minima
Y. P. Singh, Badruddin
Astrophysics and Space Science, 2015 - Short-Term Variations of Cosmic-Ray Intensity During the Recent Deep Solar Minimum and the Previous Four Solar Minima: A Wavelet Analysis
Y. P. Singh, Badruddin
Solar Physics, 2015 - Electromagnetics for electrical machines
Saurabh Mukerji, Ahmad Khan, Yatendra Singh
Electromagnetics for Electrical Machines, 2015 - Prominent short-, mid-, and long-term periodicities in solar and geomagnetic activity: Wavelet analysis
Y.P. Singh, Badruddin
Planetary and Space Science, 2014 - Temporal variations of short- and mid-term periodicities in solar wind parameters and cosmic ray intensity
Y.P. Singh, Shweta Gautam, Badruddin
Journal of Atmospheric and Solar Terrestrial Physics, 2012 - Study of the influence of magnetic fluctuations and solar plasma density on the solar wind-magnetosphere coupling
Y.P. Singh, Badruddin
Journal of Atmospheric and Solar Terrestrial Physics, 2012 - Eddy current phenomena in laminated structures due to travelling electromagnetic fields
Saurabh Kumar Mukerji, Daya Shanker Srivastava, Yatendra Pal Singh, Dharam Veer Avasthi
Progress in Electromagnetics Research M, 2011 - Characteristic features of ICMEs associated with big storms in geomagnetic activity and large Forbush decreases in cosmic ray intensity
Indian Journal of Radio and Space Physics, 2010 - Geoeffectiveness of magnetic cloud, shock/sheath, interaction region, high-speed stream and their combined occurrence
Badruddin, Y.P. Singh
Planetary and Space Science, 2009 - Solar modulation of galactic cosmic rays during the last five solar cycles
M. Singh, Y.P. Singh, Badruddin
Journal of Atmospheric and Solar Terrestrial Physics, 2008 - Corotating high-speed solar-wind streams and recurrent cosmic ray modulation
Y. P. Singh, Badruddin
Journal of Geophysical Research Space Physics, 2007 - Modulation loops, time lag and relationship between cosmic ray intensity and tilt of the heliospheric current sheet
Badruddin, M. Singh, Y. P. Singh
Astronomy and Astrophysics, 2007 - Effects of interplanetary magnetic clouds, interaction regions, and high-speed streams on the transient modulation of galactic cosmic rays
Y. P. Singh, Badruddin
Journal of Geophysical Research Space Physics, 2007 - Statistical considerations in superposed epoch analysis and its applications in space research
Y.P. Singh, Badruddin
Journal of Atmospheric and Solar Terrestrial Physics, 2006 - Effects of the polarity states of the heliospheric magnetic field and particle drifts in cosmic radiation
Y. P. Singh, Badruddin
Solar Physics, 2006 - Analysis of plasma and field conditions during some intensely geo-effective transient solar/interplanetary disturbances of solar cycle 23
Yatendra Pal Singh, Munendra Singh, Badruddin
Journal of Astrophysics and Astronomy, 2006 - Study of cosmic-ray depressions due to corotating high-speed solar-wind streams and their dependence on solar polarity
29th International Cosmic Ray Conference Icrc 2005, 2005
