Recent progress of anion-based 2D perovskites with different halide substitutions

Li, Chia-Hsin; Liao, M.-H.; Chen, Chiung-Han; Chueh, Chu‐Chen

doi:10.1039/c9tc06964j

Cited by 23 publications

(17 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the nature of the spacer cation, LPKs can form in a variety of crystal structures, the three most common being: i) The Ruddlesden-Popper (RP) phase, ii) Dion-Jacobson (DJ) phase, and iii) alternating cations in the interlayer space phase (ACI). [30] Structures formed by polymerization of RP cation monomers can be considered a separate class, PRP. [31][32][33] All these structures are schematically depicted in Figure 1.…”

Section: Layered Perovskite Structuresmentioning

confidence: 99%

Layered Perovskites in Solar Cells: Structure, Optoelectronic Properties, and Device Design

Sirbu

Balogun

Milot

et al. 2021

Advanced Energy Materials

View full text Add to dashboard Cite

optoelectronic properties akin to industrial juggernauts gallium arsenide and silicon. [1,2] Yet, the materials are compatible with solution-processing techniques such as inkjet printing and spray coating. [3] This unprecedented combination has led to the development of solar cells which already show power conversion efficiencies of over 25%, similar to state-of-the-art poly-Si and other thin-film technologies, in just over 10 years of development. [4] Hybrid perovskites are particularly interesting for indoor applications, with impressive efficiencies of over 35% demonstrated under indoor illumination which may prove a viable option to power the ever expanding Internet of Things. [5] Rather than competing with the current technology giants, perovskites can work together with other solar cell technologies in a tandem configuration. Record efficiencies of over 29% for silicon-perovskite tandem solar cells have already been reported and further progress is expected in the near future. [6] Although perovskite solar cells (PSCs) are on the verge of mass production, two main challenges remain: stability [7] and toxicity. [8] Multiple reviews already address the toxicity concern, and it will not be discussed here. [9][10][11] Layered hybrid perovskites (LPKs) have emerged as an answer to battle stability concerns. Although known for decades, LPKs have only recently been incorporated in photovoltaic (PV) applications, resulting in modest device power conversion efficiencies due to poorer optoelectronic properties. [12][13][14] However, their key advantage is the stabilizing effects of the organic interlayers, which prevents perovskite degradation. [15,16] The organic spacer inhibits ion migration which prevents the formation of irreversible degradation products. [17] Alternatively, LPKs can be deposited over the state-of-the-art perovskite materials to combine the high performance of 3D perovskites with the stabilizing properties of LPKs. [15] Here, the limiting factor is inefficient charge transport across the organic interlayer, currently preventing the full exploitation of the layered structure in PSCs.This can be approached in two ways, either by keeping the LPK layer very thin, currently the most popular approach, or by increasing the electrical conductivity of the material. [18,19] The conductivity can be enhanced through increasing the number of inorganic layers n, but this comes at the price of reduced stability. [20][21][22] The better approach is to enhance the charge transport in LPKs through the molecular engineering of the organic Layered hybrid perovskites (LPKs) have emerged as a viable solution to address perovskite stability concerns and enable their implementation in wide-scale energy harvesting. Yet, although more stable, the performance of devices incorporating LPKs still lags behind that of state-of-the-art, multication perovskite materials. This is typically assigned to their poor charge transport, currently caused by the choice of cations used within the organic layer. On balance, a compromise bet...

show abstract

Section: Layered Perovskite Structuresmentioning

confidence: 99%

Layered Perovskites in Solar Cells: Structure, Optoelectronic Properties, and Device Design

Sirbu

Balogun

Milot

et al. 2021

Advanced Energy Materials

View full text Add to dashboard Cite

show abstract

“…Nevertheless, the structures of 2D perovskites may be adjusted not only by changing the composition of the perovskite layers (X‐site tuning), but also by the molecular conceive of the organic compounds, including alkyl chain size and orientation, and replacement by inorganic compounds. [ 53 ] The following general formulas describe the characteristic features of 2D phases: (A’)(A) n −1 B n X 3 n +1 for DJ (Figure 1a), and (A’) 2 (A) n −1 B n X 3 n +1 for RP phases (Figure 1b), where A’ is aryl di/mono‐ammonium or alkyl di/monocation; A small cation is typically Cs + , formamidium (FA) + , or methylammonium (MA) + ; B site is Sn 2+ or Pb 2+ ; and the X site is I − , Br − , or Cl − ; n indicates the number of inorganic layers and can be adjusted by tuning precursor composition. It results in fewer degrees of freedom for the 2D DJ phase, as well as greater orbital contact within the spacer layer, which is further adjusted depending on the steric strain of the organic compounds.…”

Section: Brief View Of Structure and Optoelectronic Properties Of 2d ...mentioning

confidence: 99%

Recent Progress in Perovskite Materials Using Diammonium Organic Cations Toward Stable and Efficient Solar Cell Devices: Dion–Jacobson

et al. 2022

View full text Add to dashboard Cite

Perovskite solar cells have been intensively studied recently due to their superb optoelectronic properties and rapidly increasing power conversion efficiency. However, perovskite solar cells with the AMX3 structure as the light‐absorbing layer have a big stability problem. Multiple alternatives have been developed to ensure their stability, such as dimensional engineering (2D and 2D/3D), which consists of the incorporation of large organic cations into the perovskite structure. Research in dimensional engineering has been prevalent in the Ruddlesden–Popper phases. The presence of this large cation slows the decomposition and improves the stability of perovskites. Thus, new 2D perovskites are being studied based on Dion–Jacobson (DJ) phases, consisting of the addition of diammonium cations and leading to the formation of 2D and 2D/3D perovskites with better stability due to their hydrogen bonding on both sides. Moreover, 2D DJ perovskites offer the advantage of decreasing the gap between layers with higher contacts, which improves not only their optoelectronic properties, but also their charge transport properties. This article begins with an overview of the crystal structure and optoelectronic characteristics of 2D perovskites. Then, the progress achieved currently in using DJ‐phase perovskites in photovoltaic is assessed. Finally, the possible research routes for producing low‐dimensional perovskites are highlighted.

show abstract

“…In this quest, researchers are looking into 2D layered perovskites [15][16][17][18][19][20] . A perfect 2D layered perovskite has the general formula (R-NH 3 ) 2 BX 4 , where R is the organic moiety, which can be derived from basic ABX 3 type perovskite structure 21 .…”

Section: Introductionmentioning

confidence: 99%

Sn/Ge substitution in ((C$_\textrm{n}$H$_{2\textrm{n}-1}$NH$_3$)$_2$PbI$_4$; n=3): An emerging 2D layered hybrid perovskites with enhanced optoelectronic properties$^†$

Gill¹,

Yadav²,

Bhattacharya³

2022

Preprint

View full text Add to dashboard Cite

Two-dimensional (2D) perovskites show higher stability in comparison to their three-dimensional (3D) counterparts. Therefore, 2D perovskites have invoked remarkable attention in basic understanding of their physical properties and optoelectronic applications. Here we present a low-dimensional naturally self-assembled inorganicorganic (IO) hybrid systems based on primary cyclic ammonium-based (. However, the wide bandgap nature and presence of toxicity due to lead (Pb) prohibit their applications. Therefore, in the present work, we study the role of Ge/Sn substitution and Pb-vacancy (Pb-) to reduce concentration of Pb and to enhance solar cell efficiency by the formation of mixed perovskite structures. We have discussed the effect of spin-orbit coupling (SOC) using state-of-the-art hybrid density functional theory (DFT). We find the mixed conformers with Pb-do not possess structural stability. Moreover, they have indirect bandgap, which is not good for solar cell applications. Only those conformers, which have favourable thermodynamics and structural stability, are considered for further study of optical properties. Our results infer that Sn substitution is more favorable than that of Ge in replacing Pb and enhancing the efficiency. Exciton binding energies calculated using Wannier-Mott approach for pristine and substituted conformers are larger than lead halide perovskites, while the electron-phonon coupling is smaller in the former. From computed spectroscopic limited maximum efficiency (SLME), these 2D perovskites show enough promise as alternatives to conventional lead halide perovskites.

show abstract

Recent progress of anion-based 2D perovskites with different halide substitutions

Abstract: In this review, the latest developments in low dimensional perovskites and different approaches to constructing 2D perovskites are discussed, involving the traditional way of altering A-site cation and the latest way of varying X-site anion.

Cited by 23 publications

References 53 publications

Layered Perovskites in Solar Cells: Structure, Optoelectronic Properties, and Device Design

Layered Perovskites in Solar Cells: Structure, Optoelectronic Properties, and Device Design

Recent Progress in Perovskite Materials Using Diammonium Organic Cations Toward Stable and Efficient Solar Cell Devices: Dion–Jacobson

Sn/Ge substitution in ((C$_\textrm{n}$H$_{2\textrm{n}-1}$NH$_3$)$_2$PbI$_4$; n=3): An emerging 2D layered hybrid perovskites with enhanced optoelectronic properties$^†$

Contact Info

Product

Resources

About