Enhancement of fluorescence in colloidal CuInS2 nanocrystals by introduction of crystal defect

Masato Uehara; Kosuke Watanabe; Yasuyuki Tajiri; Hiroyuki Nakamura; Hideaki Maeda

doi:10.1557/proc-1176-y03-12

Enhancement of fluorescence in colloidal CuInS₂ nanocrystals by introduction of crystal defect

Masato Uehara, Kosuke Watanabe, Yasuyuki Tajiri, Hiroyuki Nakamura, Hideaki Maeda

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Cu-In-S nanocrystals were developed as a low toxic fluorescent. The stoichiometric CuInS₂ nanocrystals were synthesized facilely by heating a solution of metal complexes. The fluorescence would be originated from the crystal defect. We intentionally introduced the crystal defects related to Cu deficiency in nanocrystal with the prospect that the fluorescence intensity would be increased. The nanocrystals have many defects without phase separation as observed in bulk material. Consequently, the fluorescence quantum yield achieved to c.a. 6%. Moreover, the fluorescence quantum yield was increased up to 15% by the ZnS-coating.

Original language	English
Title of host publication	Nanocrystalline Materials as Precursors for Complex Multifunctional Structures through Chemical Transformations and Self Assembly
Publisher	Materials Research Society
Pages	15-19
Number of pages	5
ISBN (Print)	9781615677849
DOIs	https://doi.org/10.1557/proc-1176-y03-12
Publication status	Published - 2009
Externally published	Yes
Event	2009 MRS Spring Meeting - San Francisco, CA, United States Duration: Apr 14 2009 → Apr 17 2009

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	1176
ISSN (Print)	0272-9172

Other

Other	2009 MRS Spring Meeting
Country/Territory	United States
City	San Francisco, CA
Period	4/14/09 → 4/17/09

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1557/proc-1176-y03-12

Cite this

Uehara, M., Watanabe, K., Tajiri, Y., Nakamura, H., & Maeda, H. (2009). Enhancement of fluorescence in colloidal CuInS₂ nanocrystals by introduction of crystal defect. In Nanocrystalline Materials as Precursors for Complex Multifunctional Structures through Chemical Transformations and Self Assembly (pp. 15-19). (Materials Research Society Symposium Proceedings; Vol. 1176). Materials Research Society. https://doi.org/10.1557/proc-1176-y03-12

Enhancement of fluorescence in colloidal CuInS₂ nanocrystals by introduction of crystal defect. / Uehara, Masato; Watanabe, Kosuke; Tajiri, Yasuyuki et al.

Nanocrystalline Materials as Precursors for Complex Multifunctional Structures through Chemical Transformations and Self Assembly. Materials Research Society, 2009. p. 15-19 (Materials Research Society Symposium Proceedings; Vol. 1176).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Uehara, M, Watanabe, K, Tajiri, Y, Nakamura, H & Maeda, H 2009, Enhancement of fluorescence in colloidal CuInS₂ nanocrystals by introduction of crystal defect. in Nanocrystalline Materials as Precursors for Complex Multifunctional Structures through Chemical Transformations and Self Assembly. Materials Research Society Symposium Proceedings, vol. 1176, Materials Research Society, pp. 15-19, 2009 MRS Spring Meeting, San Francisco, CA, United States, 4/14/09. https://doi.org/10.1557/proc-1176-y03-12

Uehara M, Watanabe K, Tajiri Y, Nakamura H, Maeda H. Enhancement of fluorescence in colloidal CuInS₂ nanocrystals by introduction of crystal defect. In Nanocrystalline Materials as Precursors for Complex Multifunctional Structures through Chemical Transformations and Self Assembly. Materials Research Society. 2009. p. 15-19. (Materials Research Society Symposium Proceedings). doi: 10.1557/proc-1176-y03-12

Uehara, Masato ; Watanabe, Kosuke ; Tajiri, Yasuyuki et al. / Enhancement of fluorescence in colloidal CuInS₂ nanocrystals by introduction of crystal defect. Nanocrystalline Materials as Precursors for Complex Multifunctional Structures through Chemical Transformations and Self Assembly. Materials Research Society, 2009. pp. 15-19 (Materials Research Society Symposium Proceedings).

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abstract = "Cu-In-S nanocrystals were developed as a low toxic fluorescent. The stoichiometric CuInS2 nanocrystals were synthesized facilely by heating a solution of metal complexes. The fluorescence would be originated from the crystal defect. We intentionally introduced the crystal defects related to Cu deficiency in nanocrystal with the prospect that the fluorescence intensity would be increased. The nanocrystals have many defects without phase separation as observed in bulk material. Consequently, the fluorescence quantum yield achieved to c.a. 6%. Moreover, the fluorescence quantum yield was increased up to 15% by the ZnS-coating.",

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AB - Cu-In-S nanocrystals were developed as a low toxic fluorescent. The stoichiometric CuInS2 nanocrystals were synthesized facilely by heating a solution of metal complexes. The fluorescence would be originated from the crystal defect. We intentionally introduced the crystal defects related to Cu deficiency in nanocrystal with the prospect that the fluorescence intensity would be increased. The nanocrystals have many defects without phase separation as observed in bulk material. Consequently, the fluorescence quantum yield achieved to c.a. 6%. Moreover, the fluorescence quantum yield was increased up to 15% by the ZnS-coating.

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