An intrinsic electrical conductivity study of perovskite powders MAPbX3 (X = I, Br, Cl) to investigate its effect on their photovoltaic performance

• DOI: 10.1039/d3cp05686d
• Publication Date: 2024-02-07T10:06:26Z
• Authors: Shafi Ullah; Andreu Andrio; Julia Marí-Guaita; Hanif Ullah; Antonio Méndez-Blas; Roxana M. del Cas...; Bernabé Mari; Vicente Compañ
• Keywords: Chlorine (Cl); Bromine (Br); Iodine (I); MAPbX(3); FISICA APLICADA; Intrinsic electrical conductivity; Perovskite powders

An investigation into the intrinsic electrical conductivity of perovskite powders MAPbX3, where X represents iodine (I), bromine (Br), or chlorine (Cl), was conducted to explore its impact on their photovoltaic performance. Results revealed that MAPbCl3 demonstrated light absorption ability in ultraviolet and visible regions, while MAPbBr3 showed capacity for at longer wavelengths spectrum. On other hand, MAPbI3 exhibited good wavelengths, indicating absorb near-infrared region. The optical bandgap each determined be 2.90 eV MAPbCl3, 2.20 MAPbBr3, 1.47 MAPbI3. conductivities these were measured in-plane using four-probe method through-plane by electrochemical impedance spectroscopy (EIS). Electrochemical (EIS) studies a significant change temperatures between 80 °C 100 °C. This could attributed structural modifications induced when temperature exceeds values. changed from 3 × 10-8 S cm-1 60 approximately 6 10-5 120 around 2 10-3 200 Meanwhile, sheet (in-plane conductivity) measurements performed ambient reveal are 489 103 m-1, 486 m-1 510 MAPbI3, respectively. study provides valuable insights optimizing performance solar cells. Understanding how dopants influence properties material, this work will enable researchers design engineer more efficient stable cell devices based MAPbX3 perovskites.