TY - JOUR AU - Harry, Angelina AU - Sawawi, Marini AU - Kashif, Muhammad AU - Sahari, Siti Kudnie AU - Rusop, Mohammad PY - 2016/12/01 Y2 - 2024/03/28 TI - Optical, Electrical and Structural Investigation on Different Molarities of Titanium Dioxide (TiO2) via Sol-Gel Method JF - Journal of Telecommunication, Electronic and Computer Engineering (JTEC) JA - JTEC VL - 8 IS - 12 SE - Articles DO - UR - https://jtec.utem.edu.my/jtec/article/view/1441 SP - 87-91 AB - Titanium dioxide (TiO<sub>2</sub>) solution having different molarities were synthesized and deposited on glass substrates by using sol-gel spin-coating method. The variation in thickness, optical, electrical and structural properties of TiO<sub>2</sub> thin films were investigated by surface profiler (SP), UV-Vis spectroscopy, two-point probes and atomic force microscopy (AFM), respectively. The result show that the thickness of TiO<sub>2</sub> thin film increases as the molarities increases. The optical band gap energy decreases from 3.78 eV to 3.07 eV as the TiO<sub>2</sub> molarities increases from 0.01M to 0.20M. The maximum value of the absorption coefficient was 16.27 x 10<sup>4</sup> cm<sup>-1 </sup>at 0.20M with surface roughness of 21.45 nm. Thin films deposited with 0.01M show lower absorption coefficient (3.87 x 10<sup>4 </sup>cm<sup>-1</sup>) within visible region with surface roughness of 5.21 nm. The improvement in optical and structural properties of TiO<sub>2</sub> thin films affects the electrical properties as the highest conductivity 9.62 x 10<sup>2</sup> S/m is obtained by 0.20M. ER -