来源： 发布时间：2016-10-27 点击次数：
Quantum Dots based Energy and Environmental Materials Team
Main research areas:
l The preparation of quantum dots and their applications (LED lighting, display, and solar cells).
l Ultraeffective nanocrystal sorbents for heavy metal removal.
l The preparation of the waste recycling based upconversion photocatalysts and their applications.
Quantum dots (QDs) have been attracted a lot of attention in variety applications due to their unique optical and electronic properties. Our QDs based energy and environmental materials team has worked on the preparation of QDs and their applications in phosphor powders, heavy metal-ultraeffective nanocrystal sorbents, solar cells, and upconversion photocatalysts. Our research projects include the National Natural Science Foundation of China, Program for New Century Excellent Talents, the crosswise project from China Aerospace Science and Technology Group, and the State Key Program of National Natural Science Foundation of China. The long term stability of QDs is one of the biggest bottleneck problems for their applications. We develop a simple method to enhance the stability of QDs from oxidation by doping aluminum (Al), which has self-passivation behavior into the shell of the core/shell QDs. The Al2O3 films can be formed in the self-passivation process, and the ultra-stable Al doped QDs are obtained. Thus, the utilization of the principle of self-passivation has greatly promoted the practical applications of QDs in LED lighting, display, and solar cells. The effective heavy metal sorbents are synthesized due to the high surface activity and the strong cation exchange of QDs. The volatile 1-butylamine is used as the solvent and ligand, and the short ligand capped CuInS2 nanocrystal solar cells are fabricated directly, which possesses the photoelectric conversion efficiency of 4%. Based on the waste recycling technology, the efficient upconversion photocatalysts are obtained through the incorporation of QDs into upconversion semiconductors.
Some Current projects:
National Natural Science Foundation of China, Program for New Century Excellent Talents, the crosswise project from China Aerospace Science and Technology Group, and the State Key Program of National Natural Science Foundation of China.
Colloidal quantum dots developed in the NEEFM’s lab that present high photo-stability. Such materials could be used as red phosphor in LED application.
Solution processable solar cells based on in-situ synthesis of nanocrystals. Supported by National Natural Science Foundation of China (NSFC 21271179, 51278294);
Solution processable solar cells by in-situ synthesis of CuInS2 nanocrystals on ITO.