YU Junling ¹, CHEN Ting ^1,2, GONG Yun ⁴, XU Yanqiao ¹, JIANG Weihui ¹, JIANG Wan ^1,3, XIE Zhixiang ¹

(1. School of Material Science and Engineering,Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi, China; 2.Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu China; 3. College of Materials Science and Engineering, Donghua University, Shanghai 201620, China; 4. Department of Printing and Packing, Shanghai Publishing and Printing College, Shanghai 200093, China)

Abstract: Semiconductor quantum dots (QDs) have broad applications in the fields of light-emitting devices, solar cells and bio-marking technologies, due to their unique photoelectric properties. Although traditional II-VI and III-V group QDs have been commercialized, their further development is limited owing to their toxicity and harsh experimental conditions. I-III-VI group multiple QDs (such as CuInS₂, AgInS₂, etc.) have received considerable attentions, because of their low toxicity, high biocompatibility, low photobleaching, large Stokes shift and long luminescence lifetime. According to the types of solvents used, multiple QDs can be prepared in organic phase and aqueous phase media. Compared with water phase synthesis, organic phase synthesis of QDs has obvious advantages, such as high crystallinity, strong dispersion capability and high quantum yield. In this paper, the progress in the synthesis of multiple QDs in organic phase is overviewed in detail. From the point view of their structure and composition, the regulation mechanism of their optical properties is elaborated and their applications in the fields of LED, bioimaging and solar cells are summarized. Finally, the main problems faced in the development of multiple QDs are analyzed and the development direction is prospected.
Key words: quaternary quantum dot; I-III-VI QDs; organic phase; optical properties