Effects of iodine doping on optoelectronic and chemical properties of polyterpenol thin films

Journal Publication ResearchOnline@JCU
Bazaka, Kateryna;Jacob, Mohan V.
Abstract

Owing to their amorphous, highly cross-liked nature, most plasma polymers display dielectric properties. This study investigates iodine doping as the means to tune optoelectronic properties of plasma polymer derived from a low-cost, renewable resource, i.e., Melaleuca alternifolia oil. In situ exposure of polyterpenol to vapors of electron-accepting dopant reduced the optical band gap to 1.5 eV and increased the conductivity from 5.05 X 10-8 S/cm to 1.20 X 10-6 S/cm. The increased conductivity may, in part, be attributed to the formation of charge-transfer complexes between the polymer chain and halogen, which act as a cation and anion, respectively. Higher levels of doping notably increased the refractive index, from 1.54 to 1.70 (at 500 nm), and significantly reduced the transparency of films.

Journal

Nanomaterials

Publication Name

N/A

Volume

7

ISBN/ISSN

2079-4991

Edition

N/A

Issue

1

Pages Count

16

Location

N/A

Publisher

MDPI

Publisher Url

N/A

Publisher Location

N/A

Publish Date

N/A

Url

N/A

Date

N/A

EISSN

N/A

DOI

10.3390/nano7010011