Journal Article10.1021/JACS.5B13294
A Bismuth-Halide Double Perovskite with Long Carrier Recombination Lifetime for Photovoltaic Applications
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TL;DR: The double-perovskites are used to incorporate nontoxic Bi(3+) into the perovskite lattice in Cs2AgBiBr6 (1), which shows a long room-temperature fundamental photoluminescence (PL) lifetime and comparison between single-crystal and powder PL decay curves of 1 suggests inherently high defect tolerance.
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Abstract: Despite the remarkable rise in efficiencies of solar cells containing the lead-halide perovskite absorbers RPbX3 (R = organic cation; X = Br– or I–), the toxicity of lead remains a concern for the large-scale implementation of this technology. This has spurred the search for lead-free materials with similar optoelectronic properties. Here, we use the double-perovskite structure to incorporate nontoxic Bi3+ into the perovskite lattice in Cs2AgBiBr6 (1). The solid shows a long room-temperature fundamental photoluminescence (PL) lifetime of ca. 660 ns, which is very encouraging for photovoltaic applications. Comparison between single-crystal and powder PL decay curves of 1 suggests inherently high defect tolerance. The material has an indirect bandgap of 1.95 eV, suited for a tandem solar cell. Furthermore, 1 is significantly more heat and moisture stable compared to (MA)PbI3. The extremely promising optical and physical properties of 1 shown here motivate further exploration of both inorganic and hybrid hal...
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Citations
Simultaneous Power Conversion Efficiency and Stability Enhancement of Cs2AgBiBr6 Lead-Free Inorganic Perovskite Solar Cell through Adopting a Multifunctional Dye Interlayer
TL;DR: In this article, an effective and facile strategy is reported for improving the power conversion efficiency and stability by introducing an N719 dye interlayer, which plays multifunctional roles such as broadening the absorption spectrum, suppressing the charge carrier recombination, accelerating the hole extraction, and constructing an appropriate energy level alignment.
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High-Bandgap Perovskite Materials for Multijunction Solar Cells
TL;DR: In this paper, the compositional space beyond the conventional methylammonium- and formamidinium-based mixed halide compounds is reviewed in light of multijunction applications.
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Influence of metal substitution on hybrid halide perovskites: towards lead-free perovskite solar cells
Soumyo Chatterjee,Amlan J. Pal +1 more
TL;DR: In this paper, the influence of alternative elements in replacing lead vis-a-vis the materials' properties and characteristics of solar cells based on the metal-substituted hybrid halide perovskites was summarized.
208
Halide Perovskites: Thermal Transport and Prospects for Thermoelectricity
TL;DR: Recent advances in thermal transport of halide perovskites and their potentials and challenges for thermoelectrics are reviewed and strategies to overcome the limiting factors in halideperovskite thermoelectedrics and their prospects are emphasized.
207
Exploring the properties of lead-free hybrid double perovskites using a combined computational-experimental approach
TL;DR: In this paper, a density functional theory screening of the hybrid double perovskites (MA)2BIBiX6 (BI = K, Cu, Ag, Tl; X = Cl, Br, I) showed that systems with band gaps similar to those of the MAPbX3 lead compounds can be expected.
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