Revealing Charge Carrier Mobility and Defect Densities in Metal Halide Perovskites via Space-Charge-Limited Current Measurements

Le Corre VM, Duijnstee EA, El Tambouli O, Ball JM, Snaith HJ, Lim J, Koster LJA (2021)

Publication Status: Published

Publication Type: Journal article

Publication year: 2021

Journal

ACS Energy Letters American Chemical Society

Publisher: AMER CHEMICAL SOC

Book Volume: 6

Pages Range: 1087-1094

Journal Issue: 3

DOI: 10.1021/acsenergylett.0c02599

Abstract

Space-charge-limited current (SCLC) measurements have been widely used to study the charge carrier mobility and trap density in semiconductors. However, their applicability to metal halide perovskites is not straightforward, due to the mixed ionic and electronic nature of these materials. Here, we discuss the pitfalls of SCLC for perovskite semiconductors, and especially the effect of mobile ions. We show, using driftdiffusion (DD) simulations, that the ions strongly affect the measurement and that the usual analysis and interpretation of SCLC need to be refined. We highlight that the trap density and mobility cannot be directly quantified using classical methods. We discuss the advantages of pulsed SCLC for obtaining reliable data with minimal influence of the ionic motion. We then show that fitting the pulsed SCLC with DD modeling is a reliable method for extracting mobility, trap, and ion densities simultaneously. As a proof of concept, we obtain a trap density of 1.3 x 10(13) cm(-3), an ion density of 1.1 x 10(13) cm(-3), and a mobility of 13 cm(2) V-1 s(-1) for a MAPbBr(3) single crystal.

Authors with CRIS profile

Vincent Marc Le Corre Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

University of Oxford GB United Kingdom (GB) University of Groningen / Rijksuniversiteit Groningen NL Netherlands (NL)

How to cite

APA:

Le Corre, V.M., Duijnstee, E.A., El Tambouli, O., Ball, J.M., Snaith, H.J., Lim, J., & Koster, L.J.A. (2021). Revealing Charge Carrier Mobility and Defect Densities in Metal Halide Perovskites via Space-Charge-Limited Current Measurements. ACS Energy Letters, 6(3), 1087-1094. https://dx.doi.org/10.1021/acsenergylett.0c02599

MLA:

Le Corre, Vincent Marc, et al. "Revealing Charge Carrier Mobility and Defect Densities in Metal Halide Perovskites via Space-Charge-Limited Current Measurements." ACS Energy Letters 6.3 (2021): 1087-1094.

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