Tandem energy upconversion in a conjugated polymer-sensitized core/shell nanocrystal

Yu Ji, Feng Lu, Yufu Tang, Wen Qian, Quli Fan, Wei Huang

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

We developed a novel hybrid system combining inorganic NaYF4: Yb3+, Er3+@NaYF4:Yb3+ core/shell nanocrystal with organic diketopyrrolopyrrole-based conjugated polymer (PDFT). Directional energy transfer from light-harvesting PDFT to Yb3+ ions in the shell, and finally to the emitter Er3+ ions in the core takes place in this hybrid system so as to boost UCNPs upconversion efficiency. The number of antennas (concentration of PDFT) was optimized to maximize tandem energy transfer efficiency. PDFT increase the emission intensity of UCNPs by ~39-fold and having a wide range of excitable spectrum range (600–850 nm). Importantly, polymer sensitized upconversion nanosystems was much more stable compared to traditional small molecule sensitized ones, which can be important for their further applications.

Original languageEnglish
Article number107640
JournalInorganic Chemistry Communications
Volume111
DOIs
StatePublished - Jan 2020

Keywords

  • Conjugated polymer-sensitized
  • Photostability
  • Tandem energy
  • Upconversion nanoparticles

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