Influence of temperature field on electrical conductivity for amixture of perovskite nanoparticles and PEDOT:PSS

Abstract

This paper deals with the comparison of measured results for two types of perovskite nanoparticles (CsPbBr₃, Cs₃Bi₂Br₉) in two different arrangements (gap and sandwich). Space Charge Limited Current (SCLC) spectroscopy was used to analyse the measured current-voltage characteristics, from which the following parameters were evaluated: conductivity, drift mobility, trap and free charge concentration. The values in the gap and sandwich arrangements differed from each other due to the size and arrangement of the molecules, the inhomogeneous structure, or the different electrodes (PLA–C, Cu). The electrical conductivity varied in the range (2 × 10⁻⁵ – 2 × 10⁻⁴) Sm⁻¹, the free charge concentration in the range (2 × 10¹³ – 1 × 10¹⁴) m⁻³, the trapped charge concentration in the range (2×10¹⁷ – 4×10¹⁷) m⁻³, and the effective drift mobility in the range (2×10⁻³ – 1.2×10⁻²) m² V⁻¹ s⁻¹ depending on the material and experiment arrangement (gap or sandwich).