Abstract

The results of the study of one-photon processes of optically induced degradation of photoluminescence intensity of CdS/ZnSe nanocrystals are presented, and mechanisms of this degradation are determined. It is shown that the nanocrystal photodegradation process consists of three components. The first degradation component is caused by Auger recombination activation in photoinduced hole trapping by the trap associated with a surface state; a long-term degradation component can be associated with thermally activated chemical bond breaking between a passivating ligand, i.e., oleic acid, and the nanocrystal surface followed by nonradiative recombination channel activation.

中文翻译：

---

CdS / ZnSe胶态纳米晶体的发光降解机理

摘要

给出了光诱导的CdS / ZnSe纳米晶体光致降解的单光子过程的研究结果，并确定了这种降解的机理。结果表明，纳米晶体的光降解过程由三部分组成。第一降解组分是由光致空穴俘获过程中与表面状态有关的陷阱中的俄歇复合活化引起的。长期降解组分可能与钝化配体（即油酸）和纳米晶体表面之间的热活化化学键断裂有关，随后发生无辐射重组通道活化。