@ARTICLE{Baranov2021,
author={Baranov, D. and Fieramosca, A. and Yang, R.X. and Polimeno, L. and Lerario, G. and Toso, S. and Giansante, C. and Giorgi, M.D. and Tan, L.Z. and Sanvitto, D. and Manna, L.},
title={Aging of Self-Assembled Lead Halide Perovskite Nanocrystal Superlattices: Effects on Photoluminescence and Energy Transfer},
journal={ACS Nano},
year={2021},
doi={10.1021/acsnano.0c06595},
note={cited By 1},
url={https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099041613&doi=10.1021%2facsnano.0c06595&partnerID=40&md5=aa95475860128cbce748ab208c803a32},
abstract={Excitonic coupling, electronic coupling, and cooperative interactions in self-assembled lead halide perovskite nanocrystals were reported to give rise to a red-shifted collective emission peak with accelerated dynamics. Here we report that similar spectroscopic features could appear as a result of the nanocrystal reactivity within the self-assembled superlattices. This is demonstrated by studying CsPbBr3 nanocrystal superlattices over time with room-temperature and cryogenic micro-photoluminescence spectroscopy, X-ray diffraction, and electron microscopy. It is shown that a gradual contraction of the superlattices and subsequent coalescence of the nanocrystals occurs over several days of keeping such structures under vacuum. As a result, a narrow, low-energy emission peak is observed at 4 K with a concomitant shortening of the photoluminescence lifetime due to the energy transfer between nanocrystals. When exposed to air, self-assembled CsPbBr3 nanocrystals develop bulk-like CsPbBr3 particles on top of the superlattices. At 4 K, these particles produce a distribution of narrow, low-energy emission peaks with short lifetimes and excitation fluence-dependent, oscillatory decays. Overall, the aging of CsPbBr3 nanocrystal assemblies dramatically alters their emission properties and that should not be overlooked when studying collective optoelectronic phenomena nor confused with superfluorescence effects. © 2020 American Chemical Society. All rights reserved.},
publisher={American Chemical Society},
issn={19360851},
document_type={Article},
source={Scopus},
}

{"_id":"ufjPo2cDPKbRsLfob","bibbaseid":"baranov-fieramosca-yang-polimeno-lerario-toso-giansante-giorgi-etal-agingofselfassembledleadhalideperovskitenanocrystalsuperlatticeseffectsonphotoluminescenceandenergytransfer-2021","author_short":["Baranov, D.","Fieramosca, A.","Yang, R.","Polimeno, L.","Lerario, G.","Toso, S.","Giansante, C.","Giorgi, M.","Tan, L.","Sanvitto, D.","Manna, L."],"bibdata":{"bibtype":"article","type":"article","author":[{"propositions":[],"lastnames":["Baranov"],"firstnames":["D."],"suffixes":[]},{"propositions":[],"lastnames":["Fieramosca"],"firstnames":["A."],"suffixes":[]},{"propositions":[],"lastnames":["Yang"],"firstnames":["R.X."],"suffixes":[]},{"propositions":[],"lastnames":["Polimeno"],"firstnames":["L."],"suffixes":[]},{"propositions":[],"lastnames":["Lerario"],"firstnames":["G."],"suffixes":[]},{"propositions":[],"lastnames":["Toso"],"firstnames":["S."],"suffixes":[]},{"propositions":[],"lastnames":["Giansante"],"firstnames":["C."],"suffixes":[]},{"propositions":[],"lastnames":["Giorgi"],"firstnames":["M.D."],"suffixes":[]},{"propositions":[],"lastnames":["Tan"],"firstnames":["L.Z."],"suffixes":[]},{"propositions":[],"lastnames":["Sanvitto"],"firstnames":["D."],"suffixes":[]},{"propositions":[],"lastnames":["Manna"],"firstnames":["L."],"suffixes":[]}],"title":"Aging of Self-Assembled Lead Halide Perovskite Nanocrystal Superlattices: Effects on Photoluminescence and Energy Transfer","journal":"ACS Nano","year":"2021","doi":"10.1021/acsnano.0c06595","note":"cited By 1","url":"https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099041613&doi=10.1021%2facsnano.0c06595&partnerID=40&md5=aa95475860128cbce748ab208c803a32","abstract":"Excitonic coupling, electronic coupling, and cooperative interactions in self-assembled lead halide perovskite nanocrystals were reported to give rise to a red-shifted collective emission peak with accelerated dynamics. Here we report that similar spectroscopic features could appear as a result of the nanocrystal reactivity within the self-assembled superlattices. This is demonstrated by studying CsPbBr3 nanocrystal superlattices over time with room-temperature and cryogenic micro-photoluminescence spectroscopy, X-ray diffraction, and electron microscopy. It is shown that a gradual contraction of the superlattices and subsequent coalescence of the nanocrystals occurs over several days of keeping such structures under vacuum. As a result, a narrow, low-energy emission peak is observed at 4 K with a concomitant shortening of the photoluminescence lifetime due to the energy transfer between nanocrystals. When exposed to air, self-assembled CsPbBr3 nanocrystals develop bulk-like CsPbBr3 particles on top of the superlattices. At 4 K, these particles produce a distribution of narrow, low-energy emission peaks with short lifetimes and excitation fluence-dependent, oscillatory decays. Overall, the aging of CsPbBr3 nanocrystal assemblies dramatically alters their emission properties and that should not be overlooked when studying collective optoelectronic phenomena nor confused with superfluorescence effects. © 2020 American Chemical Society. All rights reserved.","publisher":"American Chemical Society","issn":"19360851","document_type":"Article","source":"Scopus","bibtex":"@ARTICLE{Baranov2021,\nauthor={Baranov, D. and Fieramosca, A. and Yang, R.X. and Polimeno, L. and Lerario, G. and Toso, S. and Giansante, C. and Giorgi, M.D. and Tan, L.Z. and Sanvitto, D. and Manna, L.},\ntitle={Aging of Self-Assembled Lead Halide Perovskite Nanocrystal Superlattices: Effects on Photoluminescence and Energy Transfer},\njournal={ACS Nano},\nyear={2021},\ndoi={10.1021/acsnano.0c06595},\nnote={cited By 1},\nurl={https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099041613&doi=10.1021%2facsnano.0c06595&partnerID=40&md5=aa95475860128cbce748ab208c803a32},\nabstract={Excitonic coupling, electronic coupling, and cooperative interactions in self-assembled lead halide perovskite nanocrystals were reported to give rise to a red-shifted collective emission peak with accelerated dynamics. Here we report that similar spectroscopic features could appear as a result of the nanocrystal reactivity within the self-assembled superlattices. This is demonstrated by studying CsPbBr3 nanocrystal superlattices over time with room-temperature and cryogenic micro-photoluminescence spectroscopy, X-ray diffraction, and electron microscopy. It is shown that a gradual contraction of the superlattices and subsequent coalescence of the nanocrystals occurs over several days of keeping such structures under vacuum. As a result, a narrow, low-energy emission peak is observed at 4 K with a concomitant shortening of the photoluminescence lifetime due to the energy transfer between nanocrystals. When exposed to air, self-assembled CsPbBr3 nanocrystals develop bulk-like CsPbBr3 particles on top of the superlattices. At 4 K, these particles produce a distribution of narrow, low-energy emission peaks with short lifetimes and excitation fluence-dependent, oscillatory decays. Overall, the aging of CsPbBr3 nanocrystal assemblies dramatically alters their emission properties and that should not be overlooked when studying collective optoelectronic phenomena nor confused with superfluorescence effects. © 2020 American Chemical Society. All rights reserved.},\npublisher={American Chemical Society},\nissn={19360851},\ndocument_type={Article},\nsource={Scopus},\n}\n\n","author_short":["Baranov, D.","Fieramosca, A.","Yang, R.","Polimeno, L.","Lerario, G.","Toso, S.","Giansante, C.","Giorgi, M.","Tan, L.","Sanvitto, D.","Manna, L."],"key":"Baranov2021","id":"Baranov2021","bibbaseid":"baranov-fieramosca-yang-polimeno-lerario-toso-giansante-giorgi-etal-agingofselfassembledleadhalideperovskitenanocrystalsuperlatticeseffectsonphotoluminescenceandenergytransfer-2021","role":"author","urls":{"Paper":"https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099041613&doi=10.1021%2facsnano.0c06595&partnerID=40&md5=aa95475860128cbce748ab208c803a32"},"metadata":{"authorlinks":{}}},"bibtype":"article","biburl":"http://nanotec.cnr.it/data/nanotec/scopus-2021.bib","dataSources":["hBBfQNnkG5adMb4hd"],"keywords":[],"search_terms":["aging","self","assembled","lead","halide","perovskite","nanocrystal","superlattices","effects","photoluminescence","energy","transfer","baranov","fieramosca","yang","polimeno","lerario","toso","giansante","giorgi","tan","sanvitto","manna"],"title":"Aging of Self-Assembled Lead Halide Perovskite Nanocrystal Superlattices: Effects on Photoluminescence and Energy Transfer","year":2021}