TY - JOUR AU - THONGJOON, Watcharaporn AU - AIEMPANAKIT, Kamon AU - CHUASONTIA, Itsarapong AU - AIEMPANAKIT, Chantana PY - 2022/12/26 Y2 - 2024/03/29 TI - Morphology and electrochromic property of chemical bath deposited NiO films at different NiSO4 concentration JF - Journal of Metals, Materials and Minerals JA - J Met Mater Miner VL - 32 IS - 4 SE - Original Research Articles DO - 10.55713/jmmm.v32i4.1534 UR - https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/1534 SP - 87-92 AB - <p>                In this study, nickel oxide (NiO) films were prepared on indium tin oxide (ITO) glass by a chemical bath deposition (CBD) at different nickel sulfate (NiSO<sub>4</sub>) concentrations. The NiO films were verified for their structural properties with field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD) while the optical properties were investigated using a spectrophotometer. Moreover, the NiO films were studied to assess their electrochemical properties by cyclic voltammetry in potassium hydroxide (KOH) electrolyte. The results showed that annealed NiO films exhibited the dominant crystal structure of the (111) plane. Meanwhile, the NiSO<sub>4</sub> concentration controlled morphological structure between dense and porous structures. The porous structure of NiO film was produced with the NiSO<sub>4</sub> concentration in the range of 0.2 M to 1.0 M and the most porous structure was NiSO<sub>4</sub> concentration at 0.8 M with a porosity of 64.56%. The optical contrast was calculated between bleached and colored states which were obtained at a maximum of 51.39% for NiO films at 0.8 NiSO<sub>4</sub> concentration. Morphological effects and electrochromic properties were highly consistent. Analysis of the cyclic voltammetry (CV) results revealed that the cyclic stability for the highly porous structure of NiO films was more deteriorating than the less porous films.</p><p> </p> ER -