LIGAND-MODIFIED QUANTUM DOT COMPOSITION, LIGAND-MODIFIED QUANTUM DOT LAYER, PREPARATION METHOD THEREFOR, AND QUANTUM DOT LIGHT-EMITTING DIODE
申请人:BOE Technology Group Co., Ltd.
公开号:EP3656832A1
公开(公告)日:2020-05-27
A ligand-modified quantum dot composition, a ligand-modified quantum dot layer, preparation methods thereof, and a quantum dot light emitting diode are provided. Segment B of the ligand modifier in the ligand-modified quantum dot composition is a chain-cleavable segment, that is, segment B is a longer molecular chain, so that the material has good solubility and stability, thus the ligand-modified quantum dot composition is present in the form of a solution or ink, etc. Segment B itself is not very stable and may be cleaved under certain conditions. In specific applications, the group in segment B may be cleaved by heating or illumination, so that the ligand modifier becomes a short molecular chain ligand, thereby making the quantum dots densely stack and improving the carrier transfer performance.
本发明提供了一种配体修饰量子点组合物、一种配体修饰量子点层、其制备方法以及一种量子点发光二极管。配体修饰量子点组合物中配体修饰剂的B段为可裂解链段,即B段为较长的分子链,使材料具有良好的溶解性和稳定性,因此配体修饰量子点组合物以溶液或墨水等形式存在。B 段本身并不十分稳定,在某些条件下可能会被裂解。在具体应用中,可以通过加热或光照使 B 段中的基团裂解,使配体修饰剂成为短分子链配体,从而使量子点密集堆积,提高载流子传输性能。