Photophysical Color Tuning for Photon Upconverting Nanoparticles
Qi-C Sun, Yuchen Ding, Prashant Nagpal1
1Materials Science and Engineering , Un iversity of Colorado Boulder , Boulder , Colorado 80303 , United States.
ACS Applied Materials & Interfaces
|July 11, 2019
Summary
Researchers achieved color tuning for photon upconversion by manipulating photophysics with surface plasmon polaritons. This method enhances efficiency for renewable energy and bioimaging applications.
Area of Science:
- Optoelectronics
- Materials Science
- Photonics
Background:
- Photon upconversion enables generating higher-energy photons from lower-energy ones, crucial for renewable energy and biological imaging.
- Efficient upconversion requires high efficiency and tunable visible light emission, often limited by chemical doping methods.
- Sub-bandgap infrared radiation utilization in optoelectronics demands improved upconversion techniques.
Purpose of the Study:
- To achieve precise color tuning of upconversion photoluminescence by modulating photophysics.
- To enhance the efficiency of upconversion processes for optoelectronic applications.
- To demonstrate the integration of tuned upconverting nanoparticles with 2D semiconductors for photocurrent generation.
Main Methods:
- Utilizing surface plasmon polaritons to modulate photophysics for color tuning.
- Employing Ytterbium (Yb3+) ion absorption of near-infrared light to tune energy states and transfer rates.
- Integrating upconverting nanoparticles with ultrathin 2D semiconductor nanosheets.
Main Results:
- Successfully tuned the color emission of upconversion photoluminescence by modulating photophysics.
- Achieved simultaneous tuning of energy states and energy-transfer rates (Yb3+ to Er3+ and Tm3+).
- Demonstrated efficient conversion of upconverted light into photocurrent using 2D semiconductor nanosheets.
Conclusions:
- Photophysical color tuning via surface plasmon polaritons offers a novel approach for upconversion applications.
- Integration with 2D semiconductors enables efficient utilization of sub-bandgap infrared radiation for optoelectronics.
- Designed metal nanostructures with precisely tuned upconverting nanoparticles hold promise for advanced optoelectronic devices.
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