Journal ArticleDOI
Analysis of the Oxygen Passivation Effects on MAPbI3 and MAPbBr3 in Fresh and Aged Solar Cells by the Transient Photovoltage Technique.
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TLDR
In this article, the carrier/ionic dynamic kinetics of fresh and aged perovskite solar cells with different compositions (MAPbI3 and MAPbBr3 ) and using spiro-OMeTAD as HTM were analyzed using transient photovoltage (TPV).Abstract:
Previous studies have revealed that for some perovskite compositions, power conversion efficiencies (PCEs) improved after storing the devices in different ambient conditions. With the aim of better understanding such improvements, we focus our attention on the carrier/ionic dynamic kinetics of fresh and aged PSCs with different perovskite compositions (MAPbI3 and MAPbBr3 ) and using spiro-OMeTAD as HTM. For that, we use transient photovoltage (TPV), a technique used to analyse the different recombination kinetics at equilibrium and at different illumination times. We observe that the aging treatment causes significant changes on the kinetics behaviour for bromide-based devices, resulting in a positive influence on the cell performance (from 3.5 % to 6.1 % PCE, in reverse scan). However, the kinetics for those iodide-based perovskite solar cells remains unchangeable (from 16.3 % to 15.0 % PCE, in reverse scan).read more
Citations
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Journal ArticleDOI
Decoupling of Implied and External V OC Due to Ionic Movement Explaining Transient V OC Overshoot in Perovskite Solar Cells
Jan Herterich,Moritz Unmüssig,Lukas Wagner,Georgios Loukeris,Jared Faisst,Mathias List,Markus Kohlstädt,Uli Würfel,Uli Würfel +8 more
Journal ArticleDOI
Influence of the Electron Selective Contact on the Interfacial Recombination in Fresh and Aged Perovskite Solar Cells
TL;DR: In this paper , the authors have used TiO2 and SnO2 layers as electron selective contact (ESC) in n-i-p perovskite solar cells configuration.
Journal ArticleDOI
Methylammonium Tetrel Halide Perovskite Ion Pairs and Their Dimers: The Interplay between the Hydrogen-, Pnictogen- and Tetrel-Bonding Interactions
TL;DR: In this paper , the ion pair models constituting the organic and inorganic ions were regarded as the repeating units of periodic crystal systems and density functional theory simulations were performed to elucidate the nature of the non-covalent interactions between them.
Posted ContentDOI
Discerning Rise Time Constants: The Connection between the Time and Frequency Domain Spectra of Perovskite Solar Cells
TL;DR: In this article , a modification of the frequency domain transfer function was proposed to focus on the transition of its real part to negative values at high frequencies, and the application of the method to experimental intensity-modulated photovoltage spectroscopy data of a PSC allowed calculation of the hidden rise time constant.
Posted ContentDOI
Discerning Rise Time Constants to Quantify Charge Carrier Extraction in Perovskite Solar Cells
TL;DR: In this paper , a modification of the frequency domain transfer function was proposed to focus on the transition of its real part to negative values at high frequencies, and the application of the method to experimental intensity-modulated photovoltage spectroscopy data of a PSC allowed calculation of the hidden rise time constant.
References
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Journal ArticleDOI
Recombination in Perovskite Solar Cells: Significance of Grain Boundaries, Interface Traps, and Defect Ions
Tejas S. Sherkar,Cristina Momblona,Lidón Gil-Escrig,Jorge Ávila,Michele Sessolo,Henk J. Bolink,L. Jan Anton Koster +6 more
TL;DR: A direct correlation is found between the density of traps, thedensity of mobile ionic defects, and the degree of hysteresis observed in the current–voltage (J–V) characteristics of perovskite solar cells.
Journal ArticleDOI
Evidence for ion migration in hybrid perovskite solar cells with minimal hysteresis
Philip Calado,Andrew M. Telford,Daniel Bryant,Xiaoe Li,Jenny Nelson,Brian C. O’Regan,Piers R. F. Barnes +6 more
TL;DR: Transient optoelectronic measurements combined with device simulations indicate that electric-field screening, consistent with ion migration, is similar in both high and low hysteresis CH3NH3PbI3 cells.
Journal ArticleDOI
Migration of cations induces reversible performance losses over day/night cycling in perovskite solar cells
Konrad Domanski,Bart Roose,Taisuke Matsui,Michael Saliba,Silver-Hamill Turren-Cruz,Juan-Pablo Correa-Baena,Cristina Roldán Carmona,Giles Richardson,Jamie M. Foster,Filippo De Angelis,James M. Ball,Annamaria Petrozza,N. Mine,Mohammad Khaja Nazeeruddin,Wolfgang Tress,Michael Grätzel,Ullrich Steiner,Anders Hagfeldt,Antonio Abate,Antonio Abate +19 more
TL;DR: In this article, the authors demonstrate that ionic defects, migrating on timescales significantly longer (above 103 s) than what has so far been explored (from 10−1 to 102 s), abate the initial efficiency by 10−15% after several hours of operation at the maximum power point.
Journal ArticleDOI
Planar CH3NH3PbBr3 hybrid solar cells with 10.4% power conversion efficiency, fabricated by controlled crystallization in the spin-coating process.
TL;DR: A power conversion efficiency of 10.4% is demonstrated in planar CH3 NH3 PbBr3 hybrid solar cells without hysteresis of the J-V curve, by way of controlled crystallization in the spin-coating process.
Journal ArticleDOI
Interpretation of Optoelectronic Transient and Charge Extraction Measurements in Dye‐Sensitized Solar Cells
Piers R. F. Barnes,Kati Miettunen,Kati Miettunen,Xiaoe Li,Assaf Y. Anderson,Takeru Bessho,Michael Grätzel,Brian C. O’Regan +7 more
TL;DR: The theory and practice of this class of optoelectronic measurements for measuring the transient electrical signals after optically perturbing a DSSC are described and the utility of large perturbation measurements such as charge extraction and the current interrupt technique for finding the internal charge and voltage within a device is considered.
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