金属イオン添加によるCu-In-S系ナノ粒子の光学特性

渡邊 厚介, 上原 雅人, 中村 浩之, 宮崎 真佐也, 前田 英明
CuInS2 (CIS) fluorescent nanocrystals (NCs) were obtained by heating an organic metal complex. The photoluminescence (PL) originated from the donor-acceptor, and the quantum yield (QY) was achieved at 6%. Furthermore, we added some metal ions (Zn 2+ , Cd 2+ or Ag + ) by the post heat-treatment in the organic coordinating solvent in order to tune the PL wavelength of NCs. By this post treatment, the alteration of NCs structure was suggested, such as changing into an alloying and composite
more » ... nd composite structure. In Zn-treated, the PL wavelength was widely tuned from 535 to 650 nm by alloying between CIS and ZnS. Moreover, PL intensity was increased with these structure alterations. In particular, the materials treated with Zn 2+ or Cd 2+ achieved respective QY of 25% and 40%. (D) •:Ag + CdS phase ZnS-CIS CIS Ag-treated CIS Cd-treated CIS Zn-treated CIS Post treatment Fig. 6 HR-TEM images of (A)Ag-treated, (B) Cd-treated, (C)Zn-treated CIS NCs. (D)Schematic view of the effect of post treatment in CIS NCs.
doi:10.15017/1398516 fatcat:2qojayia7fg63axeivif7qidka