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

Yung Ji Choi, Daesub Hwang, Heejae Chung, Dong Young Kim, Dongho Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

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.

Original languageEnglish
Article numbere202
JournalNPG Asia Materials
Volume7
Issue number7
DOIs
Publication statusPublished - 2015 Jan 1

Fingerprint

Nanofibers
Harvesting
Quantum Dots
Spatial Distribution
Spatial distribution
Semiconductor quantum dots
Solid state devices
solid state devices
spatial distribution
quantum dots
Harvesters
isolation
Photoluminescence
Polymers
templates
spacing
retarding
Isolation
Spacing
photoluminescence

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Choi, Yung Ji ; Hwang, Daesub ; Chung, Heejae ; Kim, Dong Young ; Kim, Dongho. / Controlling the spatial distribution of quantum dots in nanofiber for light-harvesting devices. In: NPG Asia Materials. 2015 ; Vol. 7, No. 7.
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Controlling the spatial distribution of quantum dots in nanofiber for light-harvesting devices. / Choi, Yung Ji; Hwang, Daesub; Chung, Heejae; Kim, Dong Young; Kim, Dongho.

In: NPG Asia Materials, Vol. 7, No. 7, e202, 01.01.2015.

Research output: Contribution to journalArticle

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