Review of Polarography
Online ISSN : 1884-7692
Print ISSN : 0034-6691
ISSN-L : 0034-6691
  • 上松 太郎
    2023 年 69 巻 2 号 p. 77-90
    発行日: 2023/10/06
    公開日: 2023/10/07
    ジャーナル フリー

    Semiconductor quantum dots (QDs) are a class of low-dimensional nanomaterials, some of which can be obtained by colloidal synthesis methods. Unique phenomena occur when electrons are confined to a few nanometers of space, such as highly monochromatic emission and size-dependent wavelength shifts. Owing to the high ratio of surface atoms to the total number of atoms in QDs, not only the crystalline structure of the core, but also surface control is key to achieving high quality emission from QDs. Techniques such as the “hot injection” method, which can produce monodisperse nanoparticles with high crystallinity, and the “core/shell” structure, in which the core is coated with another wide bandgap semiconductor material to confine photoexcited excitons, have improved the emission properties of QDs to the point where they can be used in commercial displays. Efforts are underway to expand applications further by removing cadmium and incorporating QDs into electroluminescent devices. The emergence of various optical devices using these approaches is anticipated.

  • 山本 雅博
    2023 年 69 巻 2 号 p. 91-100
    発行日: 2023/10/06
    公開日: 2023/10/07
    ジャーナル フリー


     本シリーズでは,全文を4部にわけて報告する。2023年No1の本紙でPart Iとして「半導体の基礎」を報告した。[2] ここでは,Part IIでは「半導体中のポアソン-ボルツマン式」について述べる。シリーズの今後は,Part IIIで「半導体|電解質溶液の電気二重層」,Part IVで「金属|半導体界面 の電気二重層」について記述する。

シリーズ(電気分析化学,ここが難しい! Part 12) 山本雅博 編