Articles producció científica> Enginyeria Electrònica, Elèctrica i Automàtica

Instability analysis of perovskite solar cells via short-circuit impedance spectroscopy: A case study on NiOx passivation

  • Identification data

    Identifier: imarina:9380965
    Authors:
    Almora, OsbelLopez-Varo, PilarEscalante, RenanMohanraj, JohnMarsal, Lluis FOlthof, SelinaAnta, Juan A
    Abstract:
    Perovskite solar cells (PSCs) continue to be the "front runner" technology among emerging photovoltaic devices in terms of power conversion efficiency and versatility of applications. However, improving stability and understanding their relationship with their ionic-electronic transport mechanisms continue to be challenging. In this work, a case study of NiOx-based inverted PSCs and the effect of different interface passivating treatments on device performance is presented. Impedance spectroscopy (IS) measurements in short-circuit conditions were performed under different illumination intensities, as well as bias-stress operational stability tests under constant illumination intensity. Surface treatments that involved bulky Lewis bases resulted in better and more stable performance. In contrast, acidic anion donors could induce both an initial performance decrease with a characteristic three-arcs impedance Nyquist plot and a subsequent instability during light exposure. Drift-diffusion simulations suggest strong modifications of surface recombination at the interface with the hole transport material, and for the ion concentration and mobilities in the perovskite. Importantly, capacitance and resistance are shown to peak maximum and minimum values, respectively, around mobile ion concentration (N-ion) of 10(16) and 10(17) cm(-3). These features relate to the transition from a drift-, for low N-ion below a threshold value, to a diffusion-dominated transport in the bulk of the perovskite, for high N-ion beyond the threshold value. Our results introduce a general route for characterization of instability paths in PSCs via IS performed under short-circuit conditions.
  • Others:

    Author, as appears in the article.: Almora, Osbel; Lopez-Varo, Pilar; Escalante, Renan; Mohanraj, John; Marsal, Lluis F; Olthof, Selina; Anta, Juan A
    Department: Enginyeria Electrònica, Elèctrica i Automàtica
    URV's Author/s: Almora Rodríguez, Osbel / Marsal Garví, Luis Francisco
    Keywords: Stability Silico Recombination Efficiency Degradation Charge collection
    Abstract: Perovskite solar cells (PSCs) continue to be the "front runner" technology among emerging photovoltaic devices in terms of power conversion efficiency and versatility of applications. However, improving stability and understanding their relationship with their ionic-electronic transport mechanisms continue to be challenging. In this work, a case study of NiOx-based inverted PSCs and the effect of different interface passivating treatments on device performance is presented. Impedance spectroscopy (IS) measurements in short-circuit conditions were performed under different illumination intensities, as well as bias-stress operational stability tests under constant illumination intensity. Surface treatments that involved bulky Lewis bases resulted in better and more stable performance. In contrast, acidic anion donors could induce both an initial performance decrease with a characteristic three-arcs impedance Nyquist plot and a subsequent instability during light exposure. Drift-diffusion simulations suggest strong modifications of surface recombination at the interface with the hole transport material, and for the ion concentration and mobilities in the perovskite. Importantly, capacitance and resistance are shown to peak maximum and minimum values, respectively, around mobile ion concentration (N-ion) of 10(16) and 10(17) cm(-3). These features relate to the transition from a drift-, for low N-ion below a threshold value, to a diffusion-dominated transport in the bulk of the perovskite, for high N-ion beyond the threshold value. Our results introduce a general route for characterization of instability paths in PSCs via IS performed under short-circuit conditions.
    Thematic Areas: Química Physics, applied Physics and astronomy (miscellaneous) Physics and astronomy (all) Odontología Medicina iii Medicina ii Medicina i Materiais Matemática / probabilidade e estatística Interdisciplinar Geociências General physics and astronomy Farmacia Ensino Engenharias iv Engenharias iii Engenharias ii Engenharias i Condensed matter physics Ciências biológicas iii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência da computação Biotecnología Biodiversidade Atomic and molecular physics, and optics Astronomia / física Antropologia / arqueologia
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: osbel.almora@urv.cat lluis.marsal@urv.cat
    Author identifier: 0000-0002-2523-0203 0000-0002-5976-1408
    Record's date: 2024-09-28
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://pubs.aip.org/aip/jap/article/136/9/094502/3311153/Instability-analysis-of-perovskite-solar-cells-via
    Papper original source: Journal Of Applied Physics. 136 (9): 094502-
    APA: Almora, Osbel; Lopez-Varo, Pilar; Escalante, Renan; Mohanraj, John; Marsal, Lluis F; Olthof, Selina; Anta, Juan A (2024). Instability analysis of perovskite solar cells via short-circuit impedance spectroscopy: A case study on NiOx passivation. Journal Of Applied Physics, 136(9), 094502-. DOI: 10.1063/5.0216983
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Article's DOI: 10.1063/5.0216983
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2024
    Publication Type: Journal Publications
  • Keywords:

    Atomic and Molecular Physics, and Optics,Condensed Matter Physics,Physics and Astronomy (Miscellaneous),Physics, Applied
    Stability
    Silico
    Recombination
    Efficiency
    Degradation
    Charge collection
    Química
    Physics, applied
    Physics and astronomy (miscellaneous)
    Physics and astronomy (all)
    Odontología
    Medicina iii
    Medicina ii
    Medicina i
    Materiais
    Matemática / probabilidade e estatística
    Interdisciplinar
    Geociências
    General physics and astronomy
    Farmacia
    Ensino
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Engenharias i
    Condensed matter physics
    Ciências biológicas iii
    Ciências biológicas i
    Ciências ambientais
    Ciências agrárias i
    Ciência da computação
    Biotecnología
    Biodiversidade
    Atomic and molecular physics, and optics
    Astronomia / física
    Antropologia / arqueologia
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