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The Optical Properties of Metal-Free Polymer Films with Self-Assembled Nanoparticles
Chung-Cheng Chang1, Kwang-Ming Lee2, Chia-Hong Huang3
1Department of Electrical Engineering, National Taiwan Ocean University, Keelung 202301, Taiwan.
Polymers
|December 10, 2021
Summary
A novel metal-free polymer, MA-PEG 8000-BADGE (MP8B), demonstrates antireflective properties and substrate-dependent photoluminescence. Its self-assembled nanoparticles enhance light trapping, making it suitable for optoelectronic applications.
Area of Science:
- Materials Science
- Polymer Chemistry
- Optoelectronics
Background:
- Developing advanced materials for optoelectronic devices is crucial.
- Metal-free polymers offer potential advantages in terms of cost and environmental impact.
- Antireflective and light-scattering properties are desirable for enhancing device performance.
Purpose of the Study:
- To synthesize and characterize a novel metal-free, non-conjugated polymer, MA-PEG 8000-BADGE (MP8B).
- To investigate the antireflective properties and substrate-dependent photoluminescence (SDP) of MP8B films.
- To explore the potential of MP8B as a multifunctional layer in optoelectronic applications.
Main Methods:
- Synthesis of MA-PEG 8000-BADGE (MP8B) from maleic anhydride, poly(ethylene glycol), and bisphenol-A diglycidyl ether.
- Characterization of MP8B films using photoluminescence (PL), atomic force microscopy (AFM), transmission electron microscopy (TEM), reflectance, transmittance, and UV-Vis absorption spectroscopy.
- Investigation of the effects of concentration and substrate on the photoluminescence properties.
Main Results:
- MP8B films exhibit antireflective properties, suppressing light reflection and enhancing transmission.
- Self-assembled nanoparticles within MP8B act as scattering centers, improving light trapping.
- Substrate-dependent photoluminescence was observed, with a peak emission around 538 nm on ITO.
- Increased solution concentration led to larger surface roughness and a red shift in PL spectra, with insignificant aggregation-caused quenching (ACQ).
- The optical band-gap energy of MP8B was determined to be approximately 4.05 eV.
Conclusions:
- MA-PEG 8000-BADGE (MP8B) is a promising metal-free polymer with significant antireflective and light-scattering capabilities.
- The substrate-dependent photoluminescence of MP8B, attributed to dielectric screening, offers tunable optical properties.
- MP8B films can serve as multifunctional layers, enhancing light management in optoelectronic devices.
