ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Nickel oxide (NiO) nano-triangles with enhanced electrochromic and photovoltaics properties

Ritu Goel, Ranjana Jha, and Chhaya Ravikant

Indira Gandhi Delhi Technical University for Women, New Delhi, India

E-mail: chhayaravikant@igdtuw.ac.in

Received: 18 September 2022  Accepted: 6 January 2023

Abstract:

NiO thin films have been fabricated in two-step process synthesis of NiO nanoparticles using hydrothermal method and fabrication of NiO thin film on fluorine-doped tin oxide substrate via spin-coating technique. Changing the molarities of precursor solution as 0.1 M, 0.2 M, 0.3 M, in synthesizing NiO nanoparticles affects the morphological, structural, optical, and electrochromic properties of NiO thin films. Spin-coated NiO thin films shows face-centered cubic structure with a preferred direction along < 111 > . Synthesized NiO thin films exhibits anodic electrochromism with changing transparent to colored state upon deintercalations of OH⁻ ions and electrons. NiO thin films having 0.1 M precursor solution shows better electrochromic reversibility, improved diffusion coefficient with minimum coloration and bleaching switching time. Also, it gives higher short-circuit current density with 0.7% efficiency when used in DSSC application. Thus, synthesized NiO thin films are highly efficient when used as transparent film for solar cell and electrochromic device applications.

Keywords: Nickel oxide; Nano-triangles; Anodic electrochromism; Coloration and bleaching; Solar cells

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-023-02673-y

Chemical Papers 77 (5) 2885–2903 (2023)