Abstract

We study [1] the application potential of CdSe nanoplatelets (NPLs) [2], a model system for colloidal 2D materials, as field-controlled emitters and their properties. We show that their luminescence emission can be modulated by 28% upon application of electrical fields up to 175 kV/cm. This is a very high modulation depth for field-controlled nanoemitters. Based on our experimental results we estimate the exciton binding energy in 5.5 monolayer CdSe nanoplatelets to be E_B = 170 meV. Therefore CdSe NPLs exhibit highly robust excitons being stable even at room temperature. This allows to tune the emission and recombination dynamics efficiently by external electric fields.

© 2017 IEEE