Veterinary

Study of Organometallic Sensitizer Regeneration Kinetics by Scanning Electrochemical Microscopy

Ataklti Abraha Gebreyohanes^*1 and Getachew Alemu Anshebo¹
College of Natural and Computational Sciences, Department of Physics, Samara University,
Samara, Ethiopia, B.O.Box 132.
*Corresponding author: atklt.physics@gmail.com

Abstract

Organometallic perovskite is used as a sensitizer for nanoporous nickel oxide films in photoelectrochemical solar cell applications. The regeneration kinetics of light-absorbing sensitizer molecules by the organic electrolyte 1-methy-1H-tetrazole-5-thiolate (T-) were studied using scanning electrochemical microscopy's feedback mode (SECM). The approach curves were used to calculate the regeneration rate constants. The rate constants (k_red) for perovskite
and organic dye have been found as 9.98 × 10⁶ mol^-1cm³s^-1 and 4.51 × 10⁵mol^-1cm³s^-1 respectively. Similarly, The absorption cross section (Φhv), for perovskite and organic dye have been found as 6.87 × 10⁶ mol cm² for blue LED and 4.89 × 10⁶ mol cm² for red LED, and 3.56 × 10⁵ mol cm² for blue LED and 2.15 × 10⁵ mol cm² for red LED respectively. Thus, we observed that regeneration parameters of organometallic perovskite were higher than organic dye. Generally, SECM investigation opens a new outlook for p-type dye-sensitized solar cell characterization.

Keywords: Organometallic Perovskite, SECM, Regeneration Parameters, Dye-Sensitized Solar Cells, Organic Dye