How Does Local Strain Affect Stokes Shifts in Halide Double Perovskite Nanocrystals?

© 2023 The Authors. Published by American Chemical Society.

Bibliographische Detailangaben
Veröffentlicht in:Chemistry of materials : a publication of the American Chemical Society. - 1998. - 35(2023), 21 vom: 14. Nov., Seite 9064-9072
1. Verfasser: Shaek, Saar (VerfasserIn)
Weitere Verfasser: Khalfin, Sasha, Massasa, Emma Hasina, Lang, Arad, Levy, Shai, Kortstee, Lotte T J, Shamaev, Betty, Dror, Shaked, Lifer, Rachel, Shechter, Reut, Kauffmann, Yaron, Strassberg, Rotem, Polishchuk, Iryna, Wong, Andrew Barnabas, Pokroy, Boaz, Castelli, Ivano E, Bekenstein, Yehonadav
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Chemistry of materials : a publication of the American Chemical Society
Schlagworte:Journal Article
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520 |a Lead-free perovskite nanocrystals are of interest due to their nontoxicity and potential application in the display industry. However, engineering their optical properties is nontrivial and demands an understanding of emission from both self-trapped and free excitons. Here, we focus on tuning silver-based double perovskite nanocrystals' optical properties via two iso-valent dopants, Bi and Sb. The photoluminescence quantum yield of the intrinsic Cs2Ag1-yNayInCl6 perovskite increased dramatically upon doping. However, the two dopants affect the optical properties very differently. We hypothesize that the differences arise from their differences in electronic level contributions and ionic sizes. This hypothesis is validated through absorption and temperature dependence photoluminescence measurements, namely, by employing the Huang-Rhys factor, which indicates the coupling of the exciton to the lattice environment. The larger ionic size of Bi also plays a role in inducing significant microstraining verified via synchrotron measurements. These differences make Bi more sensitive to doping concentration over antimony which displays brighter emission (QY ∼40%). Such understanding is important for engineering optical properties in double perovskites, especially in light of recent achievements in boosting the photoluminescence quantum yield 
650 4 |a Journal Article 
700 1 |a Khalfin, Sasha  |e verfasserin  |4 aut 
700 1 |a Massasa, Emma Hasina  |e verfasserin  |4 aut 
700 1 |a Lang, Arad  |e verfasserin  |4 aut 
700 1 |a Levy, Shai  |e verfasserin  |4 aut 
700 1 |a Kortstee, Lotte T J  |e verfasserin  |4 aut 
700 1 |a Shamaev, Betty  |e verfasserin  |4 aut 
700 1 |a Dror, Shaked  |e verfasserin  |4 aut 
700 1 |a Lifer, Rachel  |e verfasserin  |4 aut 
700 1 |a Shechter, Reut  |e verfasserin  |4 aut 
700 1 |a Kauffmann, Yaron  |e verfasserin  |4 aut 
700 1 |a Strassberg, Rotem  |e verfasserin  |4 aut 
700 1 |a Polishchuk, Iryna  |e verfasserin  |4 aut 
700 1 |a Wong, Andrew Barnabas  |e verfasserin  |4 aut 
700 1 |a Pokroy, Boaz  |e verfasserin  |4 aut 
700 1 |a Castelli, Ivano E  |e verfasserin  |4 aut 
700 1 |a Bekenstein, Yehonadav  |e verfasserin  |4 aut 
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773 1 8 |g volume:35  |g year:2023  |g number:21  |g day:14  |g month:11  |g pages:9064-9072 
856 4 0 |u http://dx.doi.org/10.1021/acs.chemmater.3c01771  |3 Volltext 
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