Hydrogenated Amorphous Carbon Films from Palmyra Sugar
Budhi Priyanto, Retno Asih, Irma Septi Ardiani, Anna Zakiyatul Laila, Khoirotun Nadiyyah, Bima Romadhon, Sarayut Tunmee, Hideki Nakajima, T. Triwikantoro, Yoyok Cahyono, Darminto Darminto
Abstract
A simple, highly reproducible, and environmentally friendly method is a considered approach in generating renewable energy materials. Here, hydrogenated amorphous carbon (a-C) films have been successfully prepared from palmyra liquid sugar, employing spin-coating and spraying methods. Compared with the former method, the latter shows a significance in producing a better homogeneity in particle size and film thickness. The obtained films have a thickness of approximately 1000 to 100 nm and contain an sp2 hexagonal structure (~70%) and sp3 tetrahedral configuration (~30%) of carbons. The introduction of boron (B) and nitrogen (N) as dopants has created the local structural modification of bonding, inducing a slight change of electrical conductivity, electronic energy bandgap, and optical transparency near-infrared region. The obtained a-C film features a “green” semiconducting material.