Consistent Device Simulation Model Describing Perovskite Solar Cells in Steady-State, Transient, and Frequency Domain

Autor(es):Mostrar menos -

Neukom, Martin T. ^{[1, 2, 3]} ; Schiller, Andreas ^{[2, 3]} ; Zufle, Simon ^{[2, 3]} ; Knapp, Evelyne ^[2] ; Avila, Jorge ^[4] ; Perez-del-Rey, Daniel ^[4] ; Dreessen, Chris ^[4] ; Zanoni, Kassio P. S. ^[4] ; Sessolo, Michele ^[4] ; Bolink, Henk J. ^[4] ; Ruhstaller, Beat ^{[2, 3]}

Afiliação do(s) autor(es)

^[1] Univ Augsburg, Inst Phys, D-86135 Augsburg - Germany

^[2] Zurich Univ Appl Sci, Inst Computat Phys, Wildbachstr 21, CH-8401 Winterthur - Switzerland

^[3] Fluxim AG, Loft 313, Katharina Sulzer Pl 2, CH-8400 Winterthur - Switzerland

^[4] Univ Valencia, Inst Ciencia Mol, CJ Beltran 2, Paterna 46980 - Spain

• Tipo de documento: Artigo Científico
• Fonte: ACS APPLIED MATERIALS & INTERFACES; v. 11, n. 26, p. 23320-23328, JUL 3 2019.
• Citações Web of Science: 4

Resumo

A variety of experiments on vacuum-deposited methylammonium lead iodide perovskite solar cells are presented, including JV curves with different scan rates, light intensity-dependent open-circuit voltage, impedance spectra, intensity-modulated photocurrent spectra, transient photocurrents, and transient voltage step responses. All these experimental data sets are successfully reproduced by a charge drift-diffusion simulation model incorporating mobile ions and charge traps using a single set of parameters. While previous modeling studies focused on a single experimental technique, we combine steady-state, transient, and frequency-domain simulations and measurements. Our study is an important step toward quantitative simulation of perovskite solar cells, leading to a deeper understanding of the physical effects in these materials. The analysis of the transient current upon voltage turn-on in the dark reveals that the charge injection properties of the interfaces are triggered by the accumulation of mobile ionic defects. We show that the current rise of voltage step experiments allow for conclusions about the recombination at the interface. Whether one or two mobile ionic species are used in the model has only a minor influence on the observed effects. A delayed current rise observed upon reversing the bias from +3 to -3 V in the dark cannot be reproduced yet by our drift-diffusion model. We speculate that a reversible chemical reaction of mobile ions with the contact material may be the cause of this effect, thus requiring a future model extension. A parameter variation is performed in order to understand the performance-limiting factors of the device under investigation. (AU)

• Processo FAPESP: 18/05152-7 - Camadas transportadoras de carga processáveis via métodos úmidos para aumento da eficiência de células solares de perovskitas
• Beneficiário: Kassio Papi da Silva Zanoni
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado