Enhanced photoluminescence for ZnS nanocrystals doped with Mn2+ close to carboxyl groups and/or S2- vacancies

Tetsuhiko Isobe, T. Igarashi, M. Konishi, M. Senna

Research output: Chapter in Book/Report/Conference proceedingChapter

18 Citations (Scopus)

Abstract

ZnS nanocrystals doped with Mn2+ ions are prepared by a solution process and subsequent UV irradiation to produce the samples with different S/(Zn+Mn) ratios and/or surface modification by acrylic acids. Coordination states around Mn2+ ions were examined at 9 and 35 GHz by electron paramagnetic resonance spectroscopy. The Mn2+ sites in the vicinity of S2- vacancies or carboxyl groups are observed at the frequencies more than 9 or 35 GHz, respectively, for nanocrystals, but are not for the bulk sample of 250 nm diameter. Such Mn2+ sites enhance the photoluminescence due to d-d transition of Mn2+ ions through energy transfer from S2- vacancies or carboxyl groups, excited simultaneously by a light of 350 nm for exciting ZnS.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium - Proceedings
PublisherMaterials Research Society
Pages383-388
Number of pages6
Volume536
Publication statusPublished - 1999
EventProceedings of the 1998 MRS Fall Meeting - The Symposium 'Advanced Catalytic Materials-1998' - Boston, MA, USA
Duration: 1998 Nov 301998 Dec 3

Other

OtherProceedings of the 1998 MRS Fall Meeting - The Symposium 'Advanced Catalytic Materials-1998'
CityBoston, MA, USA
Period98/11/3098/12/3

Fingerprint

Nanocrystals
Vacancies
Photoluminescence
Ions
Energy transfer
Acrylics
Paramagnetic resonance
Surface treatment
Irradiation
Spectroscopy
Acids
acrylic acid

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Isobe, T., Igarashi, T., Konishi, M., & Senna, M. (1999). Enhanced photoluminescence for ZnS nanocrystals doped with Mn2+ close to carboxyl groups and/or S2- vacancies. In Materials Research Society Symposium - Proceedings (Vol. 536, pp. 383-388). Materials Research Society.

Enhanced photoluminescence for ZnS nanocrystals doped with Mn2+ close to carboxyl groups and/or S2- vacancies. / Isobe, Tetsuhiko; Igarashi, T.; Konishi, M.; Senna, M.

Materials Research Society Symposium - Proceedings. Vol. 536 Materials Research Society, 1999. p. 383-388.

Research output: Chapter in Book/Report/Conference proceedingChapter

Isobe, T, Igarashi, T, Konishi, M & Senna, M 1999, Enhanced photoluminescence for ZnS nanocrystals doped with Mn2+ close to carboxyl groups and/or S2- vacancies. in Materials Research Society Symposium - Proceedings. vol. 536, Materials Research Society, pp. 383-388, Proceedings of the 1998 MRS Fall Meeting - The Symposium 'Advanced Catalytic Materials-1998', Boston, MA, USA, 98/11/30.
Isobe T, Igarashi T, Konishi M, Senna M. Enhanced photoluminescence for ZnS nanocrystals doped with Mn2+ close to carboxyl groups and/or S2- vacancies. In Materials Research Society Symposium - Proceedings. Vol. 536. Materials Research Society. 1999. p. 383-388
Isobe, Tetsuhiko ; Igarashi, T. ; Konishi, M. ; Senna, M. / Enhanced photoluminescence for ZnS nanocrystals doped with Mn2+ close to carboxyl groups and/or S2- vacancies. Materials Research Society Symposium - Proceedings. Vol. 536 Materials Research Society, 1999. pp. 383-388
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