학술논문
Coupling between Ion Drift and Kinetics of Electronic Current Transients in MAPbBr 3 Single Crystals.
Document Type
Academic Journal
Author
García-Batlle M; Institute of Advanced Materials (INAM), Universitat Jaume I, 12006 Castelló, Spain.; Mayén Guillén J; Grenoble Alpes University, CEA, LITEN, DTNM, F38000 Grenoble, France.; Chapran M; Grenoble Alpes University, CEA, LETI, DOPT, F38000 Grenoble, France.; Baussens O; Grenoble Alpes University, CEA, LETI, DOPT, F38000 Grenoble, France.; Zaccaro J; Grenoble Alpes University, CNRS, Grenoble INP, Institut Néel, F38042 Grenoble, France.; Verilhac JM; Grenoble Alpes University, CEA, LITEN, DTNM, F38000 Grenoble, France.; Gros-Daillon E; Grenoble Alpes University, CEA, LETI, DOPT, F38000 Grenoble, France.; Guerrero A; Institute of Advanced Materials (INAM), Universitat Jaume I, 12006 Castelló, Spain.; Almora O; Institute of Advanced Materials (INAM), Universitat Jaume I, 12006 Castelló, Spain.; Garcia-Belmonte G; Institute of Advanced Materials (INAM), Universitat Jaume I, 12006 Castelló, Spain.
Source
Publisher: American Chemical Society Country of Publication: United States NLM ID: 101697523 Publication Model: Print-Electronic Cited Medium: Print ISSN: 2380-8195 (Print) NLM ISO Abbreviation: ACS Energy Lett Subsets: PubMed not MEDLINE
Subject
Language
English
ISSN
2380-8195
Abstract
The optoelectronic properties of halide perovskite materials have fostered their utilization in many applications. Unravelling their working mechanisms remains challenging because of their mixed ionic-electronic conductive nature. By registering, with high reproducibility, the long-time current transients of a set of single-crystal methylammonium lead tribromide samples, the ion migration process was proved. Sample biasing experiments (ionic drift), with characteristic times exhibiting voltage dependence as ∝ V -3/2 , is interpreted with an ionic migration model obeying a ballistic-like voltage-dependent mobility (BVM) regime of space-charge-limited current. Ionic kinetics effectively modify the long-time electronic current, while the steady-state electronic currents' behavior is nearly ohmic. Using the ionic dynamic doping model (IDD) for the recovering current at zero bias (ion diffusion), the ionic mobility is estimated to be ∼10 -6 cm 2 V -1 s -1 . Our findings suggest that ionic currents are negligible in comparison to the electronic currents; however, they influence them via changes in the charge density profile.
Competing Interests: The authors declare no competing financial interest.
(© 2022 The Authors. Published by American Chemical Society.)
Competing Interests: The authors declare no competing financial interest.
(© 2022 The Authors. Published by American Chemical Society.)