Capacitance spectroscopy of thin-film formamidinium lead iodide based perovskite solar cells

Urbaniak, A.; Czudek, Aniela; Dagar, Janardan; Unger, Eva

doi:10.1016/j.solmat.2022.111618

Cited by 4 publications

(4 citation statements)

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“…Seebeck effect occur due to carrier scattering and electronic structure when charges diffuse between high and low temperature surface of the material [17]. These surfaces with low and high temperatures may have lower and larger concentration of charged carriers due to thermal activation, resulting in an entropy difference in carrier density [18]. The fundamental driving factor for the diffusion of these majority charge carrier from high temperature surfaces to low temperature surfaces is entropy difference which cause the Seebeck effect [19].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Nd-Doped Calcium Bismuth Cobaltites for Thermoelectric Applications

Kiani

Anis-ur-Rehman

2022

MSF

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Thermoelectricity is the best technology for converting wasted heat into clean electrical energy. Calcium Bismuth cobaltites Ca2.7Bi0.3-xNdxCo4O9+⸹ was synthesized using WOWs Sol-gel method with (x=0.0,0.05) doped with Neodymium. A structural study was carried out using the X-rays diffraction (XRD), which confirmed the Monoclinic structure of all the prepared samples. The Electrical properties were studied by using two-probe method. The thermal transport properties of the samples were measured at room temperature using the Advantageous transient plane source (ATPS) method. At room temperature thermal conductivity was measured. Seebeck coefficient as a function of temperature measurement revealed that doping Neodymium considerably increases the value of the Seebeck coefficient when compared to previously published values. At the end we measured the figure of merit (ZT).

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Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Nd-Doped Calcium Bismuth Cobaltites for Thermoelectric Applications

Kiani

Anis-ur-Rehman

2022

MSF

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“…[14][15][16][17][18] These processes originate from the low activation energies of chemical reactions and migration of ionic species in APbX 3 perovskites. [19][20][21][22][23][24][25][26][27] Anions are the most mobile species, while Pb 2+ is found to be the slowest moving species. [28,29] APbX 3 perovskites incorporating FA + and Br − ions display higher stability than other compositions under external stresses.…”

Section: Introductionmentioning

confidence: 91%

“…[ 14–18 ] These processes originate from the low activation energies of chemical reactions and migration of ionic species in APbX 3 perovskites. [ 19–27 ] Anions are the most mobile species, while Pb 2+ is found to be the slowest moving species. [ 28,29 ]…”

Section: Introductionmentioning

confidence: 99%

Degradation and Self‐Healing of FAPbBr₃ Perovskite under Soft‐X‐Ray Irradiation

et al. 2023

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The extensive use of perovskites as light absorbers calls for a deeper understanding of the interaction of these materials with light. Here, the evolution of the chemical and optoelectronic properties of formamidinium lead tri‐bromide (FAPbBr3) films is tracked under the soft X‐ray beam of a high‐brilliance synchrotron source by photoemission spectroscopy and micro‐photoluminescence. Two contrasting processes are at play during the irradiation. The degradation of the material manifests with the formation of Pb0 metallic clusters, loss of gaseous Br2, decrease and shift of the photoluminescence emission. The recovery of the photoluminescence signal for prolonged beam exposure times is ascribed to self‐healing of FAPbBr3, thanks to the re‐oxidation of Pb0 and migration of FA+ and Br− ions. This scenario is validated on FAPbBr3 films treated by Ar+ ion sputtering. The degradation/self‐healing effect, which is previously reported for irradiation up to the ultraviolet regime, has the potential of extending the lifetime of X‐ray detectors based on perovskites.

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“…Like TAS, DLTS is a temperaturesweep technique with the difference of operating in the time domain and applying a square voltage perturbation. [28,59] Due to the presence of ions in PSCs, care must be taken to measure depletion capacitance.…”

Section: Capacitance Spectroscopymentioning

confidence: 99%

Beyond Protocols: Understanding the Electrical Behavior of Perovskite Solar Cells by Impedance Spectroscopy

Ghahremanirad

Almora

Drew

et al. 2023

Advanced Energy Materials

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Impedance spectroscopy (IS) is an effective characterization technique used to probe and distinguish charge dynamics occurring at different timescales in optoelectronic and electric devices. With the rapid rise of research being conducted on perovskite solar cells (PSCs), IS has significantly contributed to the understanding of their device performance and degradation mechanisms, including metastable effects such as current–voltage hysteresis. The ionic–electronic behavior of PSCs and the presence of a wide variety of perovskite compositions and cell architectures add complexity to the accurate interpretation of the physical processes occurring in these devices. In this review, the most common IS protocols are explained to help perform accurate impedance measurements on PSC devices. It critically reviews the most commonly used equivalent circuits alongside drift‐diffusion modeling as a complementary technique to analyze the impedance response of PSCs. As an emerging method for characterizing the interfacial recombination between the perovskite layer and selective contacts, light intensity modulated impedance spectroscopy technique is further discussed. Lastly, important works on the application of IS measurement protocols for PSCs are summarized followed by a detailed discussion, providing a critical perspective and outlook on the growing topic of IS on PSCs.

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Capacitance spectroscopy of thin-film formamidinium lead iodide based perovskite solar cells

Cited by 4 publications

References 38 publications

Synthesis and Characterization of Nd-Doped Calcium Bismuth Cobaltites for Thermoelectric Applications

Synthesis and Characterization of Nd-Doped Calcium Bismuth Cobaltites for Thermoelectric Applications

Degradation and Self‐Healing of FAPbBr₃ Perovskite under Soft‐X‐Ray Irradiation

Beyond Protocols: Understanding the Electrical Behavior of Perovskite Solar Cells by Impedance Spectroscopy

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Capacitance spectroscopy of thin-film formamidinium lead iodide based perovskite solar cells

Cited by 4 publications

References 38 publications

Synthesis and Characterization of Nd-Doped Calcium Bismuth Cobaltites for Thermoelectric Applications

Synthesis and Characterization of Nd-Doped Calcium Bismuth Cobaltites for Thermoelectric Applications

Degradation and Self‐Healing of FAPbBr3 Perovskite under Soft‐X‐Ray Irradiation

Beyond Protocols: Understanding the Electrical Behavior of Perovskite Solar Cells by Impedance Spectroscopy

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Degradation and Self‐Healing of FAPbBr₃ Perovskite under Soft‐X‐Ray Irradiation