Abstract
We investigated emissive properties of CdTe colloidal quantum wells (CQWs) in applied electric fields in the range of 0–90kV/cm. Photoluminescence spectra and time-resolved intensities of the excitonic peak were studied. The emission was centered at 2.47eV with a width of 40 meV. No visible broadening or redshifts were detected in the whole range of applied fields. We obtained the dependencies of integrated intensity and maximum intensity of interband luminescence on the magnitude of applied electric field with the decrease of these characteristics by 15–20% at 90kV/cm due to field-controlled charge carrier separation. Deceleration of the radiative decay rates with increasing electric field provides the evidence of field-controlled temporary exciton storage as two-fold increase of the number of photons registered in the 1–40ns time range is observed. This assertion is also confirmed by the growth of the luminescence integrated intensity in the electric fields in the range 30–60kV/cm. These findings are an important step toward understanding of the influence of electric fields on the operation of hybrid organic-inorganic LEDs with CQW-based emissive layers.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
