Author

Nikhil Singh

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Open access Oct 2026

Deep Learning the Defect Landscape: Long-Timescale Vacancy Dynamics in Lead-Free Double Perovskites

Point defects strongly influence charge transport and recombination, as well as structural stability in metal halide perovskites, yet their geometric evolution and impact on dynamic optoelectronic properties are difficult to understand. In lead-free halide double perovskites (HDPs) such as Cs2AgBiBr6, lattice anharmo...

Nikhil Singh, Vidhi Agarwal, Dibyajyoti Ghosh · ACS Applied Energy Materials · 0 citations

Sep 2026

Design Strategy for Influencing Hot Carrier Cooling Dynamics in Low‐Dimensional Perovskites

The structural landscape of low‐dimensional perovskites, modulated by the organic spacer cation, governs the relaxation of hot carriers. Using transient absorption spectroscopy and molecular dynamics simulations, we show that spacer‐induced octahedral distortions and lattice rigidity define the balance between polaro...

Balpartap Singh, N. Saykar, Satyam Jena et al. · Advanced Energy Materials · 0 citations

Aug 2026

Metal-Site Chemistry Dominates Carrier Recombination in Layered Halide Perovskites: Insights from Excited-State Dynamics and Interpretable Machine Learning

Layered halide perovskites (LHPs) offer a powerful platform to precisely engineer excited-state carrier dynamics and optoelectronic performance via compositional tuning of B-site metals. Here, we contrast prototypical lead-based (BA)2PbBr4 with its double-perovskite analogue (BA)4AgBiBr8 to isolate the role of B-site...

Nikhil Singh, Dibyajyoti Ghosh · Chemistry of Materials · 0 citations