Exciton affinity of quantum dots |
| |
| Institution: | 1. Ioffe Institute, Saint-Petersburg, Polytechnicheskaya str., 26, 194021, Russia;2. Peter the Great St. Petersburg Polytechnic University, Saint-Petersburg, Polytechnicheskaya str., 29, 195251, Russia;3. International Space Science Institute, Bern University, 3012 Bern, Switzerland;4. Physikalisches Institut, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland;1. NPU-NCP Joint International Research Center on Advanced Nanomaterials and Defects Engineering, Northwestern Polytechnical University, Xi''an 710072, China;2. UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology, iThemba LABS, Somerset West 7129, South Africa |
| |
| Abstract: | An exciton may be attached to a quantum dot if the conduction-band and valence-band offsets, for a given dot size, satisfy certain inequalities. Alternatively, for a set of finite offsets, the dot dimension must exceed a minimal size for an exciton to be bound to the dot. These critical offset or dot size values are determined for a spherical quantum dot by a variational calculation. Both type-I and type-II situations are considered. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
