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 language | English |
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Article number | 107640 |
Journal | Inorganic Chemistry Communications |
Volume | 111 |
DOIs | |
State | Published - Jan 2020 |
Keywords
- Conjugated polymer-sensitized
- Photostability
- Tandem energy
- Upconversion nanoparticles