Interparticle Spacing Effect among Quantum Dots with High-Pressure Regulation
Ji-Chao Cheng,
Ling-Yun Pan,
Xiao-Li Huang,
Yan-Ping Huang,
Ying-Hui Wang,
Shu-Ping Xu,
Fang-Fei Li,
Zhi-Wei Men,
Tian Cui
Affiliations
Ji-Chao Cheng
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
Ling-Yun Pan
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
Xiao-Li Huang
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
Yan-Ping Huang
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
Ying-Hui Wang
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
Shu-Ping Xu
State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
Fang-Fei Li
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
Zhi-Wei Men
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
Tian Cui
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
In this paper, we explore whether interparticle spacing affects steady-state and transient-state optical properties by comparing close-packed CdSe/ZnS–quantum dots (QDs) and CdSe/ZnS–QDs dispersed in polymethyl methacrylate (PMMA). High–pressure is an effective physical means to adjust the interparticle spacing of QDs, which may artificially expand the application of QDs further. The results under high–pressure indicate that it is the reduced interparticle spacing rather than the enhanced quantum confinement effect with volume compression that has a stronger effect on exciton relaxation of CdSe/ZnS–QDs. This work is hoped to help us further understand the effect of interparticle spacing among QDs in various integrated environments.
