Experimental evidence of ion migration in aged inorganic perovskite solar cells using non-destructive RBS depth profiling

Hussain, Taimoor; Fatima, Kalsoom; Anjum, Arfa; Abbas, Tasawar; Ahmad, Ishaq; Fakharuddin, Azhar

doi:10.1039/d2ma00199c

Cited by 3 publications

(2 citation statements)

References 69 publications

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“…Specifically, according to the GCD plots, it takes 45 s for the charging plot to reach the maximum at 40 mA/g, whereas the charging time is much shorter (55 s) under 100 mA/g. The much higher content of Cs + ions in the electrolyte at 40 mA/g than that at 100 mA/g indicates that Cs + ions have sufficient time to drift out of the perovskite crystal structure when the current density is low (40 mA/g), which eventually leads to the collapse of the perovskite structure because Cs + plays a role in stabilizing the crystalline lattice in perovskite [45][46][47] . The high concentration of Cs + will also improve the formation of CsPF 6 (side reaction).…”

Section: Understanding the Cycle Stability Of The Cspbbr 3 Electrodementioning

confidence: 99%

Revealing energy storage mechanism of CsPbBr3 perovskite for ultra-stable symmetric supercapacitors

2023

Energy Mater

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Inorganic metal halide perovskites such as CsPbX 3 (X = I, Br) have been intensively studied in optoelectrical applications such as solar cells and light-emitting diodes due to better thermal and structural stability compared to the organic-inorganic hybrid perovskite counterparts. Limited studies have shown that inorganic perovskites could potentially be promising electrode materials in energy storage devices like supercapacitors. Nevertheless, there is some controversy regarding their electrochemical properties and energy storage mechanism. Furthermore, the stability of the inorganic perovskites in electrochemical energy storage systems is a big concern. In this work, we studied the electrochemical properties of CsPbBr 3 electrodes composed of pure CsPbBr 3 nanocrystals without any additives to reveal their intrinsic electrochemical characteristics. We carefully selected the electrolyte solution composed of tetrabutylammonium hexafluorophosphate in dichloromethane and the electrode substrate based on FTO glass to ensure they do not cause damage to the perovskite material or introduce side reactions during the charge-discharge process. The results showed that the CsPbBr 3 perovskite demonstrates electrical double-layer capacitive behaviour, and the specific capacitance of the electrode can reach 528 mF g -1 . A symmetrical supercapacitor based on this perovskite demonstrated exceptional cycling stability with a capacitance retention of 90% after 10,000 charge and discharge cycles at a discharge current density of 100 mA g -1 . The device also exhibited a constant power density of 25.0 mW kg -1 with increasing energy density up to 33.3 mWh kg -1 . Further characterizations have revealed the important role of the large cations and anions of tetrabutylammonium hexafluorophosphate in the electrolyte in stabilizing the perovskite electrode material.

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Section: Understanding the Cycle Stability Of The Cspbbr 3 Electrodementioning

confidence: 99%

Revealing energy storage mechanism of CsPbBr3 perovskite for ultra-stable symmetric supercapacitors

2023

Energy Mater

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“…In addition, RBS can detect both heavy and light elements, which might offer a handle at also probing nitrogen or carbon content in MHP materials. [51][52][53] The samples used for RBS were first characterized by XRD, with results shown in Figure 5a. From the peak at 2θ = 12.6˚in XRD, one film is stoichiometric MAPbI 3 (%250 nm on SnO 2 :TiO x / ITO) and the other is MAPbI 3 with PbI 2 excess (%600 nm on SnO 2 :TiO x /ITO).…”

Section: Depth-profiling Characterization In Perovskite Filmsmentioning

confidence: 99%

Efficient Metal‐Halide Perovskite Photovoltaic Cells Deposited via Vapor Transport Deposition

Hsu,

Pettit,

Swartwout

et al. 2023

Solar RRL

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Photovoltaic cells based on metal‐halide perovskites (MHPs) have exceeded the performance of other thin film technologies and rival the performance of devices based on archetypical silicon. Attractively, the perovskite active layer can be processed via a variety of solution‐ and vapor‐based methods. In this work, emphasis is on the use of vapor transport co‐deposition (VTD) to process efficient n‐i‐p photovoltaic cells based on methylammonium lead iodide (MAPbI3). VTD utilizes a hot‐walled reactor operated under moderate vacuum in the range of 0.5‐10 Torr. The organic and metal‐halide precursors are heated with the resulting vapor transported by a N2 carrier gas to a cooled substrate where they condense and react to form a perovskite film. The efficiency of photovoltaic devices based on VTD‐processed MAPbI3 is found to be highest in films with excess lead iodide (PbI2) content, with champion devices realizing exceeding 12%.This article is protected by copyright. All rights reserved.

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Probing elemental diffusion and radiation tolerance of perovskite solar cells via non-destructive Rutherford backscattering spectrometry

Parashar,

Sharma,

Saini

et al. 2024

APL Energy

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Mixed organic–inorganic halide perovskite-based solar cells have attracted interest in recent years due to their potential for both terrestrial and space applications. Analysis of interfaces is critical to predicting device behavior and optimizing device architectures. Most advanced tools to study buried interfaces are destructive in nature and can induce further degradation. Ion beam techniques, such as Rutherford backscattering spectrometry (RBS), is a useful non-destructive method to probe an elemental depth profile of multilayered perovskite solar cells (PSCs) as well as to study the inter-diffusion of various elemental species across interfaces. Additionally, PSCs are becoming viable candidates for space photovoltaic applications, and it is critical to investigate their radiation-induced degradation. RBS can be simultaneously utilized to analyze the radiation effects induced by He+ beam on the device, given their presence in space orbits. In the present work, a 2 MeV He+ beam was used to probe the evidence of elemental diffusion across PSC interfaces with architecture glass/ITO/SnO2/Cs0.05(MA0.17FA0.83)0.95Pb(I0.83Br0.17)3/spiro-OMeTAD/MoO3/Au. During the analysis, the device active area was exposed to an irradiation equivalent of up to 1.62 × 1015 He+/cm2, and yet, no measurable evidence (with a depth resolution ∼1 nm) of beam-induced ion migration was observed, implying high radiation tolerance of PSCs. On the other hand, aged PSCs exhibited indications of the movement of diverse elemental species, such as Au, Pb, In, Sn, Br, and I, in the active area of the device, which was quantified with the help of RBS.

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Experimental evidence of ion migration in aged inorganic perovskite solar cells using non-destructive RBS depth profiling

Abstract: Hybrid halide perovskites have made breakthroughs in a range of optoelectronic devices due to their favorable properties. Perovskites show mixed ionic electronic conductivity, which leads to current-voltage transients at timescales...

Cited by 3 publications

References 69 publications

Revealing energy storage mechanism of CsPbBr3 perovskite for ultra-stable symmetric supercapacitors

Revealing energy storage mechanism of CsPbBr3 perovskite for ultra-stable symmetric supercapacitors

Efficient Metal‐Halide Perovskite Photovoltaic Cells Deposited via Vapor Transport Deposition

Probing elemental diffusion and radiation tolerance of perovskite solar cells via non-destructive Rutherford backscattering spectrometry

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