Shivam Kumar Singh

Interfacial Energetics in Metal Halide Perovskite Solar Cells

Zuzanna Molenda, Lucas Scalon, Shivam Kumar Singh, Yana Vaynzof

Controlling the energetic landscape of metal halide perovskite solar cells is crucial for optimizing device efficiency and stability, as well as enabling new architectures beyond conventional layered designs. While band alignment criteria are key determinants of performance in organic photovoltaic devices, they …

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Suppression of Interfacial Loss Pathways at Self-Assembled Molecular Hole Transport Layers in Perovskite Solar Cells

Shivam Kumar Singh, Raquel Dantas Campos, Marielle Deconinck, Elena Siliavka et autres

The development of stable and efficient perovskite solar cells (PSCs) hinges on the optimization of interfacial energetics and suppression of parasitic loss pathways. While poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) and [2-(3,6-dimethoxy-9H-carbazol-9-yl)ethyl] phosphonic acid (MeO-2PACz) are among the most effective hole transport layers (HTLs) for inverted …

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2D or Not 2D? Impact of Bulky Cation Deposition Method on Inverted Perovskite Solar Cells

Marielle Deconinck, Shivam Kumar Singh, Vladimir V. Shilovskikh, L. Andrés Guerrero‐León et autres

High Resolution Image Download MS PowerPoint Slide A three-dimensional/two-dimensional (3D/2D) heterojunction interface is well-known for reducing surface recombination in perovskite solar cells. The effectiveness of 3D/2D interfaces has been particularly highlighted in standard (n-i-p) structures. However, their use in inverted (p-i-n) structures …

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Magnetron sputtering of hybrid metal halide perovskites: barriers to scalable fabrication

Laxmi Laxmi, Vladimir V. Shilovskikh, Shivam Kumar Singh, Sneha Babu et autres

Radio frequency (RF) magnetron sputtering is a scalable, solvent-free, and industry-compatible deposition technique well-suited for roll-to-roll manufacturing. Despite its many advantages, this technique is not commonly used for the deposition of metal halide perovskites, which have emerged as one of the most …

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Automated alzheimer’s detection: Leveraging machine learning models for early intervention

Deepak Rao Khadatkar, Shivam Kumar Singh, Shreeram Sharma, Ashutosh Giri

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X-Ray Absorption Spectroscopy Study of Ni-Hexahydroxytriphenylene (HHTP) MOF Catalyst for Liquid Organic Hydrogen Carrier (LOHC) Systems

Rathnayake Mudiyanselage Kumuditha Anjala Rathnayake, Shivam Kumar Singh

The shift to green energy highlights Liquid Organic Hydrogen Carrier (LOHC) systems for hydrogen storage, leveraging existing fuel infrastructure. Conventional storage methods, like compression or cryogenics, demand high pressure and low temperatures, making them energy-intensive. LOHC systems chemically bind hydrogen to liquid …

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Design and Synthesis of Dispersible Nanocrystals for Hybrid Electrolytes for Sodium Ion Batteries

Karla Vaneza Escobar, Shivam Kumar Singh

Sodium ion batteries are an emerging alternative to lithium-based systems for grid energy storage and electric vehicles due to the natural abundance and low cost of sodium. To develop this technology further it is necessary to research sodium ion-compatible solid-state electrolytes due …

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Electrocatalytic Oxygen Atom Transfer by a Manganese Based Complex

Nadira Parvin Lata, Shivam Kumar Singh, Neal P. Mankad, Ksenija D. Glusac

The development of environmentally benign oxidation methods is a critical goal in sustainable chemistry. Oxygen atom transfer (OAT) reactions, which utilize molecular oxygen (O₂) as the terminal oxidant, offer a direct and atom-economical route to functionalize organic substrates. However, selective reduction of …

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Imaging Methods for Quantifying Elemental Gradients in 3D for Battery Cathode Materials

Mansi Sanjay Porwal, Eva Michelle Allen, Shivam Kumar Singh

Ni rich cathode particles are prone to particle cracking, and they suffer from long term cycling stability. To overcome this issue researchers have come up with the core-shell architecture where they have designed the particles with Mn rich shell and Ni rich …

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A Survey on Different Approaches for Text and Image Steganography

Shivam Kumar Singh, Arun Malik

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Molecular Cross‐Linking of MXenes: Tunable Interfaces and Chemiresistive Sensing

Yudhajit Bhattacharjee, L. N. Mielke, Mahmoud Al‐Hussein, Shivam Kumar Singh et autres

Abstract MXenes, a family of 2D transition metal compounds, have emerged as promising materials due to their unique electronic properties and tunable surface chemistry. However, the translation of these nanoscale properties into macroscopic devices is constrained by suitable cross‐linking strategies that enable …

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Highly Sensitive and Selective Zinc-Based Metal–Organic Framework Derivatives Gas Sensors for Trace H 2 S Detection

Wei Wang, Li Bo Chen, Leif Riemenschneider, Chenchen Wang et autres

High Resolution Image Download MS PowerPoint Slide High sensitivity and selectivity are never-ending points of interest in the gas sensing field. Herein, the novel functionalized N-doped graphitic carbon is derived from Zn-MOF by modulating the pyrolysis temperature toward H 2 S sensing …

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