Formation and optical properties of ZnSe and ZnS nanocrystals in glasses

Study of optical properties of thermally evaporated ZnSe thin films annealed at different pulsed laser powers

“…The binary ZnSe system is one of the most famous monochalcogenides due to its direct energy gap in the visible region. Zinc Selenide is used as a window layer in the fabrication of thin-film solar cells, in heterojunction formed with some narrow band-gap semiconductor [9][10][11]. It is mainly used as protective and antireflection coating for infrared (IR) operating electrochromic thermal-control surface devices.…”

Optical properties of Cu ions‐doped ZnSe quantum dots in silicate glasses

“…For the AP CU00 specimen, only one broad band emission centered at 565 nm was observed. This broad band emission is from the Se‐related color centers such as Se 2− and Se–Se chain . For the annealed CU00 specimens, narrow emission peaks are observed, in addition to the broad band emission.…”

“…Introducing Mn 2+ ions into CdSe and PbSe QDs in glasses leads to the formation of semimagnetic Cd 1−x Mn x Se and Pb 1−x Mn x Se NCs in glasses . Incorporation of Mn 2+ ions into the ZnS nanocrystals embedded in Pyrex glasses results in the orange emission from Mn 2+ : 4 T 1 – 6 A 1 transition, instead of the broad band emission from surface defects observed from pure ZnS QDs and ZnSe QDs in glasses …”

“…For QDs made from semiconductors with large band gap energies and small exciton Bohr radii, such as ZnS and ZnSe, it is difficult to find proper shell to passivate the surface defects, and the PL QY of these QDs are always found to be low . For example, ZnS QDs and ZnSe QDs embedded glasses only show broad‐band defect emission in the visible spectral range without any intrinsic emission . Precipitation of transition‐metal ions‐doped QDs in glasses has been reported .…”

Precipitation and Optical Properties of CsPbBr3 Quantum Dots in Phosphate Glasses

“…For applications, quantum dots should be incorporated into some robust hosts, such as glasses. Until present, II–VI and IV–VI quantum dots such as ZnS, ZnSe, CdS, CdSe, PbS, PbSe, etc., have been prepared in glasses, tunable absorption and photoluminescence in the visible and near‐infrared spectral range has been achieved . It has also been found that precipitation of quantum dots into the glasses can prevent the agglomeration of quantum dots, and maintain the thermal stability of quantum dots as most of the quantum dots were precipitated inside the glass matrices upon thermal treatment at temperatures ranging from 400°C to 600°C …”