Controlling the spatial distribution of quantum dots in nanofiber for light-harvesting devices

Title
Controlling the spatial distribution of quantum dots in nanofiber for light-harvesting devices
Authors
최영지황대섭정희재김동영김동호
Keywords
SENSITIZED SOLAR-CELLS; ENERGY RELAY DYES; SOLID-STATE; GRAPHENE; PORPHYRINS
Issue Date
2015-07
Publisher
NPG Asia Materials
Citation
VOL 7, e202-1-e202-7
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/50494
ISSN
18844049
Appears in Collections:
KIST Publication > Article
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