Photoinduced carrier dynamics of nearly stoichiometric oleylamine-protected copper indium sulfide nanoparticles and nanodisks

Masanori Sakamoto, Lihui Chen, Makoto Okano, David M. Tex, Yoshihiko Kanemitsu, Toshiharu Teranishi

研究成果: Article

16 引用 (Scopus)

抄録

Copper indium sulfide (CuInS<inf>2</inf>) nanocrystals (NCs) are nontoxic and cost-effective, making them attractive for use in highly efficient solar cells. However, direct observations of the photoinduced carrier dynamics of CuInS<inf>2</inf> NCs to examine the relationship between carrier dynamics and structural parameters with the aim of optimizing NC properties for specific applications are limited. Here, we synthesized nearly stoichiometric oleylamine-protected CuInS<inf>2</inf> NCs using two convenient one-pot methods to produce CuInS<inf>2</inf> nanoparticles and nanodisks. Transient absorption measurements using femtosecond laser flash photolysis revealed that the use of oleylamine as a protecting ligand leads to the formation of vacancy-doped NCs. The rapid decay of the photogenerated excitons in the oleylamine-protected NCs was not sensitive to the crystal structure or shape of NCs, and could be explained by defect trapping and energy transfer to the hole-based localized surface plasmon resonance in the oleylamine-protected NCs. Our results confirm that careful selection of a protecting ligand is important to obtain CuInS<inf>2</inf> NCs with optimized properties for particular applications.

元の言語English
ページ(範囲)11100-11105
ページ数6
ジャーナルJournal of Physical Chemistry C
119
発行部数20
DOI
出版物ステータスPublished - 2015 5 21
外部発表Yes

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Indium sulfide
indium sulfides
copper sulfides
Nanocrystals
Copper
nanocrystals
Nanoparticles
nanoparticles
Ligands
oleylamine
ligands
Photolysis
Surface plasmon resonance
Ultrashort pulses
surface plasmon resonance
Excitons
Energy transfer
Vacancies
flash
photolysis

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

これを引用

Photoinduced carrier dynamics of nearly stoichiometric oleylamine-protected copper indium sulfide nanoparticles and nanodisks. / Sakamoto, Masanori; Chen, Lihui; Okano, Makoto; Tex, David M.; Kanemitsu, Yoshihiko; Teranishi, Toshiharu.

:: Journal of Physical Chemistry C, 巻 119, 番号 20, 21.05.2015, p. 11100-11105.

研究成果: Article

Sakamoto, Masanori ; Chen, Lihui ; Okano, Makoto ; Tex, David M. ; Kanemitsu, Yoshihiko ; Teranishi, Toshiharu. / Photoinduced carrier dynamics of nearly stoichiometric oleylamine-protected copper indium sulfide nanoparticles and nanodisks. :: Journal of Physical Chemistry C. 2015 ; 巻 119, 番号 20. pp. 11100-11105.
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AU - Kanemitsu, Yoshihiko

AU - Teranishi, Toshiharu

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