The ability to control inter-dot or inter-molecule spacing of functional moieties in solid-state devices has long been studied for both fundamental and technological reasons. In this study, we present a new strategy for controlling the distance between quantum dots (QDs) based on one-dimensional spatial confinement in a polymer nanofiber template. This reliable technique allows for the isolation of QDs at a sufficient distance in a thin film and retains their monomeric character, with distinct spectra from aggregates (∼30-nm shift) and monoexponential photoluminescence decay, indicating the suppression of inter-dot interactions. We successfully developed light-harvesting devices by incorporating QDs in nanofibers as an auxiliary light harvester, improving the performance of these devices from 5.9 to 7.4%. This strategy offers a viable path of controlling the arrangements of various functional moieties in solid-state devices.
Bibliographical noteFunding Information:
This work was supported by the Global Frontier R&D Program of the Center for Multiscale Energy Systems funded by the National Research Foundation under the Ministry of Science, ICT & Future, Korea (2012-8-2081; DK). The authors gratefully acknowledge the support from the KIST Institutional Programs (Project 2E25371) (DYK). Author contributions: YJC and DH conducted the fabrication and measurements. YJC, DH and DYK conceived the idea. DK supervised the study. YJC, HC and DK wrote the manuscript. All authors contributed to data analysis and reviewed the manuscript.
© 2015 Nature Publishing Group All rights reserved.
All Science Journal Classification (ASJC) codes
- Modelling and Simulation
- Materials Science(all)
- Condensed Matter Physics