Current-voltage analysis: lessons learned from hysteresis

Unger, Eva; Czudek, Aniela; Kim, Hui Seon; Tress, Wolfgang

doi:10.1016/b978-0-12-814727-6.00004-9

Cited by 9 publications

(21 citation statements)

References 104 publications

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“…S3b †. In the present study, the HI is defined based on the variation in the FF in the reverse and forward scan directions (denoted as FF RS and FF FS , respectively) according to eqn (3): 47 …”

Section: Resultsmentioning

confidence: 99%

Correlation between hysteresis dynamics and inductance in hybrid perovskite solar cells: studying the dependency on ETL/perovskite interfaces

et al. 2023

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Section: Resultsmentioning

confidence: 99%

Correlation between hysteresis dynamics and inductance in hybrid perovskite solar cells: studying the dependency on ETL/perovskite interfaces

et al. 2023

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“…Although the low V OC and FF values for LL-based PSCs are in accordance with their conductivity (Figure 2c,d), no conclusive correlation is obtained between conductivity measurements and V OC or FF trends for other doping conditions. Meanwhile, in the case of PCE (Figure 3d), DL (15) shows the highest average, while LL displays particularly low values. Except for LD, the PCE in the FS direction experiences a drop vis-a-vis in RS under either scanning speed.…”

Section: Resultsmentioning

confidence: 95%

“…43 For LD (Figure 6b), DL (Figure 6c), and DL(15) (Figure 6d), only two well-separated arcs are observed prior to light soaking. However, after preillumination, the spectra for DL and DL (15) develop a third arc in the low-frequency region. For the spectra showing two arcs, the equivalent circuit in Figure S4a was utilized, while for the three-arc patterns (either well-separated or merged), the equivalent circuit in Figure S4b was chosen.…”

Section: Resultsmentioning

confidence: 98%

Impact of Photo-Induced Doping of Spiro-OMeTAD as HTL on Perovskite Solar Cell Hysteresis Dynamics

Yekani,

Wang,

Ghamari

et al. 2024

J. Phys. Chem. C

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The doping strategy employed for enhancing the hole conductivity of spiro-OMeTAD as a hole transport layer (HTL) in perovskite solar cells (PSCs) is rarely specified in the literature. However, as revealed in this work, the specifics of the doping process with respect to the type of storage and its duration can have important consequences for the evolution of hysteresis dynamics in PSCs. The variability in photovoltaic metrics and hysteresis loci in current−voltage (J−V) curves are studied before and after light soaking, as well as at different scan rates, to determine operational differences as a result of a given doping process. With the aid of X-ray photoelectron spectroscopy (XPS) results showing the formation of deleterious compounds such as Li 2 O and LiF, next to proposed operational band alignments, the evolution of hysteresis trends for different doping strategies is explained. Finally, utilizing electrochemical impedance spectroscopy (EIS), signatures of HTL bulk and interfacial conductivity modulation are identified. The propagation of a third semicircle in the low-frequency part of the Nyquist plot is ascribed to performance loss caused by unfavorable interfacial electrochemical reactions, while the shrinkage of the high-frequency arc is linked with performance gain due to increased HTL bulk conductivity. This work underlines the important correlation between the spiro-OMeTAD doping strategy with hysteresis evolution as well as loss and gain in PSC performance under operational conditions.

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“…Various approaches are evaluated, involving migration of mobile ions within the perovskite films, ferroelectric behavior (formation of domains with alternating polarization, which is strongly debated in the literature [39][40][41][42][43] ) of the perovskite, or trapping and detrapping of charge carriers within the perovskite. The current knowledge on hysteresis phenomena is summarized in extended reviews; [44][45][46][47] however, these are mostly focused on lead-based perovskites. A comprehensive discussion of hysteresis in lead-free PSCs, e.g., based on tin or silver and bismuth, is still missing.…”

Section: Experimental Methods To Study Characteristics Of Contacts and Interfacesmentioning

confidence: 99%

“…Therefore, they strongly recommended to report scan properties along with PSC data and argued in favor of a standard characterization protocol, as established for lead-based PSCs. [47,[100][101][102] In addition, j-V scans after prebiasing at V OC for 10 s were performed and resulted in strongly increased j SC for high scan rates (Figure 7c). By combining their findings about the choice of the contact material, scan rate, and pre-biasing dependence, they concluded that the migration of ions in Cs 2 AgBiBr 6 is influenced by the external bias, which yields a modification of the built-in potential in the absorber.…”

Section: Hysteresis In Cs 2 Agbibr 6 Pscsmentioning

confidence: 99%

Role of Interfaces and Contact Formation for the Application of Lead‐Free Perovskite Materials in Photovoltaic Cells

Horn

Schlettwein

2021

Physica Rapid Research Ltrs

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Perovskite solar cells (PSCs) represent a promising approach toward a climate‐neutral energy supply. Great progress has been made to reach attractive efficiencies of photovoltaic cells at rather low energy input. However, the toxicity of today´s most efficient materials combined with their chemical instability even when assembled to devices poses unsolved problems. Alternative materials have been developed but up to now cannot compete in efficiency. In many instances, such lack of efficiency is caused by problems in contact formation. Aside from reports in cell architecture, a number of studies have focused on the specific investigation of contact phenomena, also in lateral geometry. Chemical reactivity at interfaces and migration of ions in contacts and within the perovskite materials lead to significant hysteresis in electron conduction and photovoltaic properties. Herein, recent results on such investigations for lead‐free perovskite materials are reviewed. The main findings of contact formation with these materials are summarized and the specific impact of different methods of analysis is discussed. By these means, the hope is to provide a good starting ground for groups with new approaches to materials chemistry or device architecture as well as to groups with new approaches to device analysis.

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Current-voltage analysis: lessons learned from hysteresis

Cited by 9 publications

References 104 publications

Correlation between hysteresis dynamics and inductance in hybrid perovskite solar cells: studying the dependency on ETL/perovskite interfaces

Correlation between hysteresis dynamics and inductance in hybrid perovskite solar cells: studying the dependency on ETL/perovskite interfaces

Impact of Photo-Induced Doping of Spiro-OMeTAD as HTL on Perovskite Solar Cell Hysteresis Dynamics

Role of Interfaces and Contact Formation for the Application of Lead‐Free Perovskite Materials in Photovoltaic Cells

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