On the structure, synthesis, and characterization of ultrafast blue-emitting CsPbBr3 nanoplatelets
Recent developments in medical imaging techniques, in particular, those in time-of-flight positron emission tomography put new challenges on scintillating material performance that cannot be fulfilled by conventional scintillators. Bright and ultrafast nanoparticles represent promising candidates to...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2019-01-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/1.5079300 |
| _version_ | 1818545707378802688 |
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| author | Kateřina Tomanová Václav Čuba Mikhail G. Brik Eva Mihóková Rosana Martinez Turtos Paul Lecoq Etiennette Auffray Martin Nikl |
| author_facet | Kateřina Tomanová Václav Čuba Mikhail G. Brik Eva Mihóková Rosana Martinez Turtos Paul Lecoq Etiennette Auffray Martin Nikl |
| author_sort | Kateřina Tomanová |
| collection | DOAJ |
| description | Recent developments in medical imaging techniques, in particular, those in time-of-flight positron emission tomography put new challenges on scintillating material performance that cannot be fulfilled by conventional scintillators. Bright and ultrafast nanoparticles represent promising candidates to build up an advanced detection system needed. We synthesize colloidal CsPbBr3 nanoplatelets emitting blue light with fast sub-nanosecond decay. We also prepare a nanocomposite material by embedding the nanoplatelets in the polystyrene matrix. We show that blue emission is preserved provided the composite is not exposed to UV/vis light and/or elevated temperatures. Motivated by conflicting information from the literature about the room temperature structure of colloidal CsPbX3 (X = Cl, Br, I) particles, that results being orthorhombic, rather than cubic, we perform ab initio electronic structure calculations of bulk crystals with an orthorhombic structure. We calculate optical properties, as well as exciton diameters and binding energies and compare them to those previously obtained for cubic CsPbX3 crystals. |
| first_indexed | 2024-12-12T07:43:35Z |
| format | Article |
| id | doaj.art-f55e0cec90ba41a6ba78e4085cd56fee |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-12-12T07:43:35Z |
| publishDate | 2019-01-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj.art-f55e0cec90ba41a6ba78e4085cd56fee2022-12-22T00:32:43ZengAIP Publishing LLCAPL Materials2166-532X2019-01-0171011104011104-1210.1063/1.5079300008901APMOn the structure, synthesis, and characterization of ultrafast blue-emitting CsPbBr3 nanoplateletsKateřina Tomanová0Václav Čuba1Mikhail G. Brik2Eva Mihóková3Rosana Martinez Turtos4Paul Lecoq5Etiennette Auffray6Martin Nikl7Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, Prague 115 19, Czech RepublicDepartment of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, Prague 115 19, Czech RepublicCollege of Sciences, Chongqing University of Posts and Telecommunications, Chongqing 400065, People’s Republic of ChinaDepartment of Optical Materials, Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, Prague 162 53, Czech RepublicCERN, 1211 Geneva 23, SwitzerlandCERN, 1211 Geneva 23, SwitzerlandCERN, 1211 Geneva 23, SwitzerlandDepartment of Optical Materials, Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, Prague 162 53, Czech RepublicRecent developments in medical imaging techniques, in particular, those in time-of-flight positron emission tomography put new challenges on scintillating material performance that cannot be fulfilled by conventional scintillators. Bright and ultrafast nanoparticles represent promising candidates to build up an advanced detection system needed. We synthesize colloidal CsPbBr3 nanoplatelets emitting blue light with fast sub-nanosecond decay. We also prepare a nanocomposite material by embedding the nanoplatelets in the polystyrene matrix. We show that blue emission is preserved provided the composite is not exposed to UV/vis light and/or elevated temperatures. Motivated by conflicting information from the literature about the room temperature structure of colloidal CsPbX3 (X = Cl, Br, I) particles, that results being orthorhombic, rather than cubic, we perform ab initio electronic structure calculations of bulk crystals with an orthorhombic structure. We calculate optical properties, as well as exciton diameters and binding energies and compare them to those previously obtained for cubic CsPbX3 crystals.http://dx.doi.org/10.1063/1.5079300 |
| spellingShingle | Kateřina Tomanová Václav Čuba Mikhail G. Brik Eva Mihóková Rosana Martinez Turtos Paul Lecoq Etiennette Auffray Martin Nikl On the structure, synthesis, and characterization of ultrafast blue-emitting CsPbBr3 nanoplatelets APL Materials |
| title | On the structure, synthesis, and characterization of ultrafast blue-emitting CsPbBr3 nanoplatelets |
| title_full | On the structure, synthesis, and characterization of ultrafast blue-emitting CsPbBr3 nanoplatelets |
| title_fullStr | On the structure, synthesis, and characterization of ultrafast blue-emitting CsPbBr3 nanoplatelets |
| title_full_unstemmed | On the structure, synthesis, and characterization of ultrafast blue-emitting CsPbBr3 nanoplatelets |
| title_short | On the structure, synthesis, and characterization of ultrafast blue-emitting CsPbBr3 nanoplatelets |
| title_sort | on the structure synthesis and characterization of ultrafast blue emitting cspbbr3 nanoplatelets |
| url | http://dx.doi.org/10.1063/1.5079300 |
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