Development of MWCNT thin film electrode transparent in the mid-IR range. Issue 8 (1st June 2020)

• Record Type: Journal Article
• Authors: Stanojev, Jovana; Bajac, Branimir; Cvejic, Zeljka; Matovic, Jovan; Srdic, Vladimir V.
• Is Part Of: Ceramics international. Volume 46:Issue 8(2020)Part A
• Page Start: 11340
• Page End: 11345
• Publication Date: 2020-06-01
• Subjects: MWCNT -- Layer-by-layer assembly -- Thin films -- Transparent electrodes -- Mid-IR detectors; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.01.163
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this research carbon nanotube-based thin film electrodes, with high transparency in mid-infrared range, were developed as a replacement for indium tin oxide electrodes. The thin film electrodes were prepared from polyelectrolyte and multi-walled carbon nanotubes by layer-by-layer assembly. Polyethyleneimine (PEI) and carboxylic multi-walled carbon nanotubes (MWCNT-COOH) were deposited alternately on glass substrates. Samples with different number of bilayers (PEI + MWCNT-COOH) were prepared. Thickness of the films varied between 80 and 240 nm, depending of the number of bilayers. After deposition of each bilayer, the samples were dried at 120 °C for 10 min. The fabricated films were characterized using Raman spectroscopy, high-resolution scanning microscopy (HRSEM) and transmission electron microscopy (TEM). Transparency of the films was measured in UV/Vis and IR ranges, utilizing UV/Vis spectrophotometer and FTIR spectrometer respectively. Sheet resistance of the films was measured with four-point probe method and the resistance values obtained were ranging from 6 kΩ/sq up to 23 kΩ/sq, depending on the number of layers.