Energy-Transfer-Dominated Transient Absorption Dynamics from CdTe/ZnS Quantum Dots to Molybdenum Disulfide

• Published in: Journal of physical chemistry. C Vol. 128; no. 37; pp. 15533 - 15536
• Main Authors: Wang, Shengzhi, Tang, Jiacheng, Liu, Xin, Wu, Ruixiang, Li, Bin, Miao, Xiangyang
• Format: Journal Article
• Language: English
• Published: American Chemical Society 19.09.2024
• Subjects: C: Spectroscopy and Dynamics of Nano, Hybrid, and Low-Dimensional Materials
• ISSN: 1932-7447; 1932-7455
• DOI: 10.1021/acs.jpcc.4c03907

Photoluminescence (PL) quenching and energy transfer dynamics between CdTe/ZnS quantum dots (QDs) and molybdenum disulfide (MoS2) were investigated by transient absorption (TA) spectroscopy. With the increase of MoS2, the PL intensity of QDs would be quenched gradually, originating from the energy transfer. The stimulated emission lifetime of CdTe/ZnS-MoS2 composites becomes longer, resulting from backward energy transfer to QDs. The blue-shifted upward photoinduced absorption feature of QDs can be attributed to the enhanced trapping capability, which needs a higher photon energy. The efficient control of energy transfer dynamics opens up new avenues for application in the field of optoelectronics and provides guidance for the manufacture of high-performance devices.