Green/eco-friendly electronic approaches: Analysis of optoelectronic applications of cellulose-supported composite...

This study presents a comprehensive analysis of the optical and dielectric behaviors of composite hydrogels supported cellulose produced from hemp biomass to determine their suitability for optoelectronic application, and the effect of biocomposite amount on the behaviors. The optical conductivity of cellulose-supported p(AMPS/IA) composite hydrogels whose UV spectral behaviors were determined to be compatible with semiconductor materials was found to be almost inversely proportional to the amount of the biocomposite. The highest optical energy gap was calculated for hydrogels including the lowest amount of biocomposite. The dielectric properties of the samples were analyzed as frequency dependent, and these properties were consistent with Maxwell-Wagner and Koop's theories in the low and high frequency regions, respectively. The complex impedance plane plots (Cole-Cole plots) of cellulose-supported composite hydrogels are equivalent to a resistor-capacitor (RC) circuit in the Smith chart, and the sample with the lowest amount has the highest conductivity originated from the dielectric relaxation. Experimental results showed that the amount of biomass is an important factor affecting the optical and dielectric properties of the samples. Moreover, cellulose-supported composite hydrogels were found to have promising potential for different circuit elements in low or high frequency green/environmentally friendly optoelectronic applications.