Structural analysis and electrical properties of amorphous carbon thin films

Diajeng I. Pamungkas*, Mukarromah, Budhi Priyanto, Hideki Nakajima, Sarayut Tunmee, Darminto

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Citations (Scopus)


The amorphous carbon (a-C) thin films have been developed by many researchers due to many superior properties. The aim of this research is to study the structure and electrical properties of amorphous carbon thin film. Carbonization process of coconut sap at 250°C was successfully produced amorphous carbon phase. Coconut sap and its derivatives were used as raw material in this research. The variation used in this research was a calcinating temperature ranging from 250°C, 400°C, and 600°C. Amorphous carbon powder was then mixed with aquades. Ultrasonic cleaner was then used for 2 hours and then centrifuged at 4000 rpm for 30 minutes. Deposition technique used in this research was spin-coating. Amorphous carbon phase was known from diffraction pattern which shows a broad peak at 2θ =15-30°. The functional group was known from infrared absorption which resolved into several peaks, which were assigned to C ̶ O, C=C, C ̶ H, and O ̶ H bonding. Photo Emission Spectroscopy (PES) was used to measure the percentage of sp2 and sp3 configuration in the sample. From the PES data, the percentage of sp2 configuration of coconut sap heated at 400°C and 600°C are 71% and 64.8%. The conductivity and band gap of each material was also measured using four-point probe method, resulting in 2.67 – 8.33 S/m and 0.15 – 0.49 eV.

Original languageEnglish
Title of host publicationFunctional Properties of Modern Materials II
Editors Darminto, Budhy Kurniawan, Risdiana, Isao Watanabe, Agustinus Agung Nugroho
PublisherTrans Tech Publications Ltd
Number of pages6
ISBN (Print)9783035714968
Publication statusPublished - 2019
Event4th International Conference on Functional Materials Science, ICFMS 2018 - Bali, Indonesia
Duration: 13 Nov 201815 Nov 2018

Publication series

NameMaterials Science Forum
Volume966 MSF
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752


Conference4th International Conference on Functional Materials Science, ICFMS 2018


  • Amorphous carbon
  • Carbonization
  • Hybridized orbitals


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