Octahedral distortion driven by CsPbI3nanocrystal reaction temperature - the effects on phase stability and beyond

Anastasia Matuhina; G. Krishnamurthy Grandhi; Maning Liu; Jan-Henrik Smått; N. S.M. Viswanath; Harri Ali-Löytty; Kimmo Lahtonen; Paola Vivo

doi:10.1039/d1nr04071e

Octahedral distortion driven by CsPbI₃nanocrystal reaction temperature - the effects on phase stability and beyond

Anastasia Matuhina
, G. Krishnamurthy Grandhi
, Maning Liu^*
, Jan-Henrik Smått
, N. S.M. Viswanath
, Harri Ali-Löytty
, Kimmo Lahtonen
, Paola Vivo^*

^*Korresponderande författare för detta arbete

Molekylärvetenskap och -teknik

Forskningsoutput: Tidskriftsbidrag › Artikel › Vetenskaplig › Peer review

11 Citeringar (Scopus)

31 Nedladdningar (Pure)

Sammanfattning

Cesium lead iodide (CsPbI3) perovskite nanocrystals (NCs) suffer from a known transformation at room temperature from their red-emitting (black) to non-emitting (yellow) phase, induced by the tilting of PbI6 octahedra. While the reported attempts to stabilize CsPbI3 NCs mainly involve Pb2+-site doping as well as compositional and/or NC surface engineering, the black phase stability in relation only to the variation of the reaction temperature of CsPbI3 NCs is surprisingly overlooked. We report a holistic study of the phase stability of CsPbI3 NCs, encompassing dispersions, films, and even devices by tuning the hot-injection temperature between 120-170 °C. Our findings suggest that the transition from the black to the yellow phase occurs after over a month for NCs synthesized at 150 °C (150@NCs). Structural refinement studies attribute the enhanced stability of 150@NCs to their observed lowest octahedral distortion. The 150@NCs also lead to stable unencapsulated solar cells with unchanged performance upon 26 days of shelf storage in dry air. Our study underlines the importance of scrutinizing synthesis parameters for designing stable perovskite NCs towards long-lasting optoelectronic devices.

Originalspråk	Engelska
Sidor (från-till)	14186-14196
Antal sidor	11
Tidskrift	Nanoscale
Volym	13
Nummer	33
DOI	https://doi.org/10.1039/d1nr04071e
Status	Publicerad - 6 aug. 2021
MoE-publikationstyp	A1 Tidskriftsartikel-refererad

Finansiering

Dr Mari Honkanen and Tampere Microscopy Center are gratefully acknowledged for the TEM images. The authors also thank Dr Antti Tukiainen for his support with the solar cell measurements. This work is part of the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), Decision No 320165. A. M. and P. V. thank the finan- cial support of Tampere University, Faculty of Engineering and Natural Sciences. M. L. thanks Finnish Cultural Foundation (00210670) for funding. J.-H. S. thanks Academy of Finland (project 308307). P. V. and J.-H. S. also acknowledge the support of Jane & Aatos Erkko foundation (project ‘ASPIRE’).

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10.1039/d1nr04071eLicens: CC BY

d1nr04071eSlutlig publicerad version, 3,26 MBLicens: CC BY

https://urn.fi/URN:NBN:fi-fe2023050139701

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title = "Octahedral distortion driven by CsPbI3nanocrystal reaction temperature - the effects on phase stability and beyond",

abstract = "Cesium lead iodide (CsPbI3) perovskite nanocrystals (NCs) suffer from a known transformation at room temperature from their red-emitting (black) to non-emitting (yellow) phase, induced by the tilting of PbI6 octahedra. While the reported attempts to stabilize CsPbI3 NCs mainly involve Pb2+-site doping as well as compositional and/or NC surface engineering, the black phase stability in relation only to the variation of the reaction temperature of CsPbI3 NCs is surprisingly overlooked. We report a holistic study of the phase stability of CsPbI3 NCs, encompassing dispersions, films, and even devices by tuning the hot-injection temperature between 120-170 °C. Our findings suggest that the transition from the black to the yellow phase occurs after over a month for NCs synthesized at 150 °C (150@NCs). Structural refinement studies attribute the enhanced stability of 150@NCs to their observed lowest octahedral distortion. The 150@NCs also lead to stable unencapsulated solar cells with unchanged performance upon 26 days of shelf storage in dry air. Our study underlines the importance of scrutinizing synthesis parameters for designing stable perovskite NCs towards long-lasting optoelectronic devices.",

author = "Anastasia Matuhina and Grandhi, \{G. Krishnamurthy\} and Maning Liu and Jan-Henrik Sm{\aa}tt and Viswanath, \{N. S.M.\} and Harri Ali-L{\"o}ytty and Kimmo Lahtonen and Paola Vivo",

note = "Funding Information: Dr Mari Honkanen and Tampere Microscopy Center are gratefully acknowledged for the TEM images. The authors also thank Dr Antti Tukiainen for his support with the solar cell measurements. This work is part of the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), Decision No 320165. A. M. and P. V. thank the finan- cial support of Tampere University, Faculty of Engineering and Natural Sciences. M. L. thanks Finnish Cultural Foundation (00210670) for funding. J.-H. S. thanks Academy of Finland (project 308307). P. V. and J.-H. S. also acknowledge the support of Jane \& Aatos Erkko foundation (project {\textquoteleft}ASPIRE{\textquoteright}). Publisher Copyright: {\textcopyright} The Royal Society of Chemistry.",

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doi = "10.1039/d1nr04071e",

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T1 - Octahedral distortion driven by CsPbI3nanocrystal reaction temperature - the effects on phase stability and beyond

AU - Matuhina, Anastasia

AU - Grandhi, G. Krishnamurthy

AU - Liu, Maning

AU - Smått, Jan-Henrik

AU - Viswanath, N. S.M.

AU - Ali-Löytty, Harri

AU - Lahtonen, Kimmo

AU - Vivo, Paola

N1 - Funding Information: Dr Mari Honkanen and Tampere Microscopy Center are gratefully acknowledged for the TEM images. The authors also thank Dr Antti Tukiainen for his support with the solar cell measurements. This work is part of the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), Decision No 320165. A. M. and P. V. thank the finan- cial support of Tampere University, Faculty of Engineering and Natural Sciences. M. L. thanks Finnish Cultural Foundation (00210670) for funding. J.-H. S. thanks Academy of Finland (project 308307). P. V. and J.-H. S. also acknowledge the support of Jane & Aatos Erkko foundation (project ‘ASPIRE’). Publisher Copyright: © The Royal Society of Chemistry.

PY - 2021/8/6

Y1 - 2021/8/6

N2 - Cesium lead iodide (CsPbI3) perovskite nanocrystals (NCs) suffer from a known transformation at room temperature from their red-emitting (black) to non-emitting (yellow) phase, induced by the tilting of PbI6 octahedra. While the reported attempts to stabilize CsPbI3 NCs mainly involve Pb2+-site doping as well as compositional and/or NC surface engineering, the black phase stability in relation only to the variation of the reaction temperature of CsPbI3 NCs is surprisingly overlooked. We report a holistic study of the phase stability of CsPbI3 NCs, encompassing dispersions, films, and even devices by tuning the hot-injection temperature between 120-170 °C. Our findings suggest that the transition from the black to the yellow phase occurs after over a month for NCs synthesized at 150 °C (150@NCs). Structural refinement studies attribute the enhanced stability of 150@NCs to their observed lowest octahedral distortion. The 150@NCs also lead to stable unencapsulated solar cells with unchanged performance upon 26 days of shelf storage in dry air. Our study underlines the importance of scrutinizing synthesis parameters for designing stable perovskite NCs towards long-lasting optoelectronic devices.

AB - Cesium lead iodide (CsPbI3) perovskite nanocrystals (NCs) suffer from a known transformation at room temperature from their red-emitting (black) to non-emitting (yellow) phase, induced by the tilting of PbI6 octahedra. While the reported attempts to stabilize CsPbI3 NCs mainly involve Pb2+-site doping as well as compositional and/or NC surface engineering, the black phase stability in relation only to the variation of the reaction temperature of CsPbI3 NCs is surprisingly overlooked. We report a holistic study of the phase stability of CsPbI3 NCs, encompassing dispersions, films, and even devices by tuning the hot-injection temperature between 120-170 °C. Our findings suggest that the transition from the black to the yellow phase occurs after over a month for NCs synthesized at 150 °C (150@NCs). Structural refinement studies attribute the enhanced stability of 150@NCs to their observed lowest octahedral distortion. The 150@NCs also lead to stable unencapsulated solar cells with unchanged performance upon 26 days of shelf storage in dry air. Our study underlines the importance of scrutinizing synthesis parameters for designing stable perovskite NCs towards long-lasting optoelectronic devices.

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DO - 10.1039/d1nr04071e

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VL - 13

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EP - 14196

JO - Nanoscale

JF - Nanoscale

IS - 33

ER -