2019
DOI: 10.1002/adma.201900521
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Tracking Structural Phase Transitions in Lead‐Halide Perovskites by Means of Thermal Expansion

Abstract: The success of hybrid organic-inorganic perovskites (HOIP) in photovoltaic applications is based on their high power conversion efficiencies, up to 23.3%, in combination with seemingly

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Cited by 106 publications
(137 citation statements)
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“…[ 10 ] Δ L / L is positive with the same magnitude for all compounds, yet, above the phase transition temperature T p , Δ L / L ∝ T in contrast to the methylammonium‐based lead halide materials. [ 51 ] Both Δ L / L and α are illustrated for the temperature region in the vicinity of the structural phase transition temperature in Figure 4d. The T p s are summarized in Figure 4g for all materials extracted from the maximum of α.…”
Section: Cs2agbibr6 (Cs098rb002)2agbibr6 (Cs098k002)2agbibr6 (Cs0mentioning
confidence: 99%
“…[ 10 ] Δ L / L is positive with the same magnitude for all compounds, yet, above the phase transition temperature T p , Δ L / L ∝ T in contrast to the methylammonium‐based lead halide materials. [ 51 ] Both Δ L / L and α are illustrated for the temperature region in the vicinity of the structural phase transition temperature in Figure 4d. The T p s are summarized in Figure 4g for all materials extracted from the maximum of α.…”
Section: Cs2agbibr6 (Cs098rb002)2agbibr6 (Cs098k002)2agbibr6 (Cs0mentioning
confidence: 99%
“…[1][2][3][4][5] Perovskites with ABX 3 structure are typically composed of organic cations at A site and inorganic cages BX 6 (B = Pb 2+ , Sn 2+ ; X = I − , Br − , Cl − ). [6,7] Owing to the small rotational energy and nonspherical nature, the organic cations with intrinsic dipole moment induce a dipolar polarization. [8,9] And the presence of the heavy elements (Pb 2+ and I − ) in APbI 3 leads to significant spin-orbit coupling (SOC), thus excitons in hybrid perovskites possess both orbital (L) and spin (S) momentums with the total momentum J = L + S. [10][11][12] In general, the electrical polarization plays an important role in suppressing the charge recombination, facilitating charge transport, and even polarizing excited states, which are critically MA/FA ratio in the MA x FA (1−x) PbI 3 .…”
Section: Introductionmentioning
confidence: 99%
“…We note that the δ-FAPbBr 3 phase is not observed at high RH ( Supplementary Fig. 14) because δ-FAPbBr 3 is only stable below −8°C (265 K) 54 .…”
Section: Synthesis Of Layered Formamidinium Metal Halide Perovskitesmentioning
confidence: 93%