Study of Electron Transport Layer‐Free and Hole Transport Layer‐Free Inverted Perovskite Solar Cells

Dayan, Adva Shpatz; Etgar, Lioz

doi:10.1002/solr.202100578

Cited by 12 publications

(7 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This region of the EQE spectra indicates how efficient the charges are extracted, due to the hole transport layer (HTL). 43 Clearly, for BzmCl, the charge extraction efficiency is lower than with PhACCl. This may suggest that the energy-level alignment between the BzmCl-based perovskite and the HTL is less favorable than the energy-level alignment of the PhACCl-based perovskite with the HTL.…”

Section: ■ Results and Discussionmentioning

confidence: 96%

“…It can be seen that both EQE spectra match until the 600 nm wavelength; however, from this wavelength onward, the BzmCl spectra start to decrease in comparison with the PhACCl spectra. This region of the EQE spectra indicates how efficient the charges are extracted, due to the hole transport layer (HTL) . Clearly, for BzmCl, the charge extraction efficiency is lower than with PhACCl.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Barrier Molecules Based on Formamidinium for Low-Dimensional Perovskite Solar Cells

Wallach

Binyamin

Yudco

et al. 2022

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

Low-dimensional perovskites are attractive materials for solar cells; this mainly includes barrier molecules based on ammonium or diammonium groups. In this work, we used barrier molecules based on a formamidinium (FA) functional group instead of the traditional ammonium functional group. Two FAbased barrier molecules were studied and compared: phenyl acetimidamide chloride (PhACCl) and benzamidine chloride (BzmCl). The main difference between the barrier molecules is the distance of the FA group from the aromatic ring, which results in the formation of two-dimensional (2D) perovskite in the case of PhACCl, whereas BzmCl formed a quasi-1D (one-dimensional) structure based on single-crystal X-ray diffraction (XRD). Absorbance, photoluminescence (PL), and XRD measurements show the existence of a 2D structure for PhACCl. The existence of a 1D phase in perovskite based on BzmCl as the barrier molecule inhibits charge transfer and forms pinholes in the film. Charge extraction and PL decay measurements show a high recombination rate with BzmCl, whereas with PhACCl there is better alignment of the energy levels to the selective contacts; this minimizes the hysteresis and enhances the cycle stability. The photovoltaic performance of low-dimensional n = 7 cells, based on PhACCl, shows 11.5% efficiency, with an open-circuit voltage of 1.08 V. This study investigates the use of FA-based barrier molecules and shows the importance of steric hindrance in the formation of a 2D perovskite structure.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Barrier Molecules Based on Formamidinium for Low-Dimensional Perovskite Solar Cells

Wallach

Binyamin

Yudco

et al. 2022

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The indium tin oxide (ITO) is a flexible transparent conducting substrate that significantly affects the perovskite device performance. On the other hand, developing high‐performance HTL‐free perovskite solar cells with simpler device configuration is desirable for the perovskite solar cell commercialization 331‐334 . To this end, various interfacial engineering approaches such as the deployment of self‐assembled monolayers have been developed to modify the work function, surface energy, and wettability of the perovskite/ITO interface.…”

Section: Molecular Engineer Interfacesmentioning

confidence: 99%

“…On the other hand, developing high-performance HTL-free perovskite solar cells with simpler device configuration is desirable for the perovskite solar cell commercialization. [331][332][333][334] To this end, various interfacial engineering approaches such as the deployment of self-assembled monolayers have been developed to modify the work function, surface energy, and wettability of the perovskite/ITO interface. The organic molecules include phosphonic acids, carboxylic acids, and silanes, to name a few, have been demonstrated to interact with the ITO substrate via hydroxylinduced dehydration.…”

Section: Molecular Engineer Perovskite/ Htl Interfacementioning

confidence: 99%

Molecular design for perovskite solar cells

Zhang

2022

Intl J of Energy Research

View full text Add to dashboard Cite

The molecular approach is an effective way to improve the optoelectronic performance and stability of perovskite solar cells. In this manuscript, we review the progress and design principles of the molecular compounds for perovskite solar cells. The molecular design strategies that consider the A-site cations, additive molecules, solvent molecules, and surface adsorbates are explained, followed by a discussion on the molecular design at different perovskite-related interfaces, including the perovskite/perovskite interface, the electron transporting layer/perovskite interface, and the hole transporting layer/perovskite interface. Subsequently, the molecular impacts on the charge transfer directions at the perovskite surface and the molecular engineering on the molecular-scale halide perovskites are elucidated. The machine learning methods are emphasized to globally optimize the molecular layers for the perovskite solar cells from the complicated multidimensional virtual design space. Last but not least, the molecular design protocols are summarized and the suggestions for the future research directions on the molecular design for the halide perovskite materials are provided. This manuscript highlights the effectiveness of the molecular design strategies to improve the optoelectronic performance and stabilities of the perovskite solar cells.

show abstract

“…For the development of highly efficient ETL-free cells, one of the foremost factors required to be considered is the energy levels discrepancy between the FTO glass and perovskite, which is greater than that of a common architecture and may be an origin for the some probable resistances and recombination centers. [10] The energy barrier for electron (ΔE e ) to transport across the bottom electrode/perovskite interface is defined as the energy distinction between the conduction band minimum (CBM) of the perovskite layer and the Fermi level (E F ) of FTO. Multidisciplinary attempts have been committed to curtailing the ΔE e and optimizing the interfacial characteristics.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Self‐Assembled Ionic Liquid Modified Rigid and Flexible Substrates for Efficient Simple‐Structured Perovskite Solar Cells

Huang,

Dong,

Zhu

et al. 2023

ChemSusChem

View full text Add to dashboard Cite

The advancement of electron transport layer (ETL)‐free perovskite solar cells (PSCs) is crucial for the commercialization of PSCs. At present, the phlegmatic electron extraction and grievous carrier recombination, related to the energy‐level alignment at the FTO/perovskite interface, restrict the performance of ETL‐free PSCs. The facile modification of bottom electrodes is pivotal for tackling these issues and stimulating the photovoltaic potential of perovskite. Herein, a cost‐competitive and neoteric 1‐hydroxyethyl‐3‐methylimidazolium chloride ([HOEtMIM]Cl) ionic liquid is employed to modify the surface of rigid and flexible electrodes, and thus enable an energetically well‐aligned interface with perovskite layer via the electric dipole effects. The resulting barrier‐free FTO/perovskite contact can tremendously ameliorate the electron extraction and collection, with mitigated nonradiative interfacial carrier recombination loss. Additionally, the lone pair on the nitrogen of the imidazole group passivates the surface defects of perovskite layers, and the chloride anion plays a role in the crystallinity improvement of perovskite. Leveraged by the [HOEtMIM]Cl modification, the resulting ETL‐free rigid and flexible devices deliver an outstanding power conversion efficiency of 19.60% and 15.57%, along with the ameliorated hysteresis and long‐term tenability.This finding highlights the drastic potential of the engineered [HOEtMIM]Cl in manufacturing stable and high‐performance ETL‐free PSCs for their scaled‐up production.

show abstract

Study of Electron Transport Layer‐Free and Hole Transport Layer‐Free Inverted Perovskite Solar Cells

Cited by 12 publications

References 54 publications

Barrier Molecules Based on Formamidinium for Low-Dimensional Perovskite Solar Cells

Barrier Molecules Based on Formamidinium for Low-Dimensional Perovskite Solar Cells

Molecular design for perovskite solar cells

Multifunctional Self‐Assembled Ionic Liquid Modified Rigid and Flexible Substrates for Efficient Simple‐Structured Perovskite Solar Cells

Contact Info

Product

Resources

About