2022
DOI: 10.1002/adfm.202201309
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Comment on “Interplay of Structural and Optoelectronic Properties in Formamidinium Mixed Tin‐Lead Triiodide Perovskites”

Abstract: Studying optoelectronic properties inFAPb 1−x Sn x I 3 and in FA 0.83 Cs 0.17 Pb 1−x Sn x I 3 perovskites as a function of the lead:tin content, Parrott et al. (2018) and Savill et al. (2020) observed the broadest luminescence linewidth and the largest Stokes shift in mixed compositions with Sn <25% and with >85%. It is in contrast to the intuitive expectation of the largest effects of alloy disorder for the 50:50 composition. This comment addresses the alloy disorder caused by statistical local spatial fluctu… Show more

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Cited by 3 publications
(6 citation statements)
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“…Using eq , we show below that the largest effects of alloy disorder are, in fact, expected for x a < 0.25 and for x b > 0.85. Moreover, the effect at x a should be much more pronounced than that at x b , in agreement with the experimental data. , Therefore, further crystal growth optimization might not be helpful to diminish the effects of alloy disorder in FAPb 1– x Sn x I 3 and FA 0.83 Cs 0.17 Pb 1– x Sn x I 3 perovskites . In other words, the samples have already achieved a high quality with respect to the effects of alloy disorder.…”
Section: Alloy Disorder In Various Semiconductor Alloyssupporting
confidence: 81%
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“…Using eq , we show below that the largest effects of alloy disorder are, in fact, expected for x a < 0.25 and for x b > 0.85. Moreover, the effect at x a should be much more pronounced than that at x b , in agreement with the experimental data. , Therefore, further crystal growth optimization might not be helpful to diminish the effects of alloy disorder in FAPb 1– x Sn x I 3 and FA 0.83 Cs 0.17 Pb 1– x Sn x I 3 perovskites . In other words, the samples have already achieved a high quality with respect to the effects of alloy disorder.…”
Section: Alloy Disorder In Various Semiconductor Alloyssupporting
confidence: 81%
“…In Figure , the composition dependence ε 0 ( x ) in accord with these equations is plotted. In the calculations, a concentration of lattice sites N = 4 × 10 21 cm –3 was used, based on the estimate for the lattice constant a ≃ 6.3 × 10 –8 cm . There is uncertainty in the choice of the effective mass m in eq .…”
Section: Alloy Disorder In Various Semiconductor Alloysmentioning
confidence: 99%
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