Temperature dependence of the photoluminescence of MnS/ZnS core—shell quantum dots

Abstract

Temperature dependence of the photoluminescence of MnS/ZnS core-shell quantum dots * Fang Dai-Feng(房岱峰) a) , Ding Xing(丁 星) b) , Dai Ru-Cheng(代如成) c) † , Zhao Zhi(赵 智) a) , Wang Zhong-Ping(王中平) c) , and Zhang Zeng-Ming(张增明) c) a)

Pressure-Induced Anomalous Emission Behaviors of MnS/ZnS Quantum Dots

“…Figure shows the excitation spectra of Mn 2+ 4 T 1 ( 4 G) emission. The emission spectrum is plotted in the inset, which shows typical Mn 2+ 4 T 1 ( 4 G) emission peak at 590 nm and defect state emission peak at 440 nm. , The strong excitation of the ZnS host is at wavelengths shorter than 370 nm. Some small excitation peaks at about 400, 435, 475, and 530 nm are the direct excitation of Mn 2+ ions.…”

“…They attributed the lifetime components to Mn 2+ ions in different environments. Fang et al 13 further studied the photoluminescence (PL) of MnS/ZnS QDs at low temperature and analyzed it with thermal quenching theory.…”

Size-dependent exchange bias in single phase Mn 3 O 4 nanoparticles

“…[3][4][5] In particular, both the core-shell systems with a ferromagnet (FM) core and an antiferromagnet (AFM) or a ferrimagnet (FIM) shell which could be obtained from an oxidation of transition metal nanoparticles, and the so-called "inverted" core-shell systems with an AFM core and a FIM shell, e.g., MnO/Mn 3 O 4 , [6,7] MnO/Mn 2 O 3 , [8] and Mn/Mn 3 O 4 , [9] have come into focus for the study of the EB effect resulting from the exchange coupling between the core and the shell. [10] Usually, the core and the shell correspond to two different magnetic materials in the core-shell nanoparticles systems. In addition to the FM/AFM and AFM/FIM interfaces, EB has also been observed in other types of interfaces involving a spin glass (SG) phase (e.g., FM/SG).…”