Excitation-Wavelength-Dependent and Substrate-Dependent Photoluminescence From the Nonconjugated Polymeric Thin Film With Self-Assembly Nanoparticles
| Autor: | Cheng-Yen Liu, Kwang-Ming Lee, Chung-Cheng Chang, Jia-Ming Wang, Chia-Hong Huang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
lcsh:Applied optics. Photonics
Photoluminescence Materials science genetic structures Band gap Nanoparticle 02 engineering and technology Substrate (electronics) 010402 general chemistry 01 natural sciences chemistry.chemical_compound lcsh:QC350-467 Electrical and Electronic Engineering Thin film dielectric screening chemistry.chemical_classification self-assembly nanoparticles lcsh:TA1501-1820 Polymer Polymeric thin films 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences Blueshift chemistry Chemical engineering photoluminescence 0210 nano-technology Ethylene glycol lcsh:Optics. Light |
| Zdroj: | IEEE Photonics Journal, Vol 10, Iss 6, Pp 1-8 (2018) |
| ISSN: | 1943-0655 |
| Popis: | Nonconjugated polymers have been synthesized from maleic anhydride, poly(ethylene glycol), and bisphenol-diglycidyl ether without utilizing any solvent. The polymeric thin films produced by the nonconjugated polymers were spin-coated on ITO coated glass and Si substrates. Self-assembly nanoparticles (1.6–6.2 nm) are observed. It is proposed that the nanoparticle is constructed through a self-assembly process with bisphenol-A aggregates and poly(ethylene glycol) moieties. The photoluminescence spectrum of the polymeric thin film on ITO peaks at near 450 nm that spans from 360 to 610 nm under 266 nm excitation. The polymeric thin film exhibits the excitation-wavelength-dependent photoluminescence that the emission peak shifts toward longer wavelength (about 11 nm) when the excitation wavelength increases from 266 to 325 nm, which is attributed to nanoparticle size distribution. Meanwhile, the substrate-dependent photoluminescence has been also observed that the PL peak of the polymeric thin film spin-coated on Si shows a blue shift (about 9 nm) compared with that on ITO, which probably arises from the dielectric screening. The highest occupied molecular orbital energy of the polymeric thin film is about –9.4 eV. The optical band gap is about 3.28 eV. The nonconjugated polymer is expected to use as a host material in optoelectronic applications. |
| Databáze: | OpenAIRE |
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