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...
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
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
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