title: Quantization of multiparticle auger rates in semiconductor quantum dots
abstract: We have resolved single-exponential relaxation dynamics of the 2-, 3-, and 4-electron-hole pair states in nearly monodisperse cadmium selenide quantum dots with radii ranging from 1 to 4 nanometers. Comparison of the discrete relaxation constants measured for different multiple-pair states indicates that the carrier decay rate is cubic in carrier concentration, which is characteristic of an Auger process. We observe that in the quantum-confined regime, the Auger constant is strongly size-dependent and decreases with decreasing the quantum dot size as the radius cubed.
authors.affiliation: Chemical Science and Technology Division, CST-6, MS-J585, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. Department of Chemistry and Center for Materials Science and Engineering, Massachusetts Institute of Technology, 77 Mass.
authors.initials: VI
authors.lastname: Klimov
authors.initials: AA
authors.lastname: Mikhailovsky
authors.initials: DW
authors.lastname: McBranch
authors.initials: CA
authors.lastname: Leatherdale
authors.initials: MG
authors.lastname: Bawendi