Dion-Jacobson Phase 2D Layered Perovskites for Solar Cells with Ultrahigh Stability

Ahmad, Sajjad; Fu, Ping; Yu, Shuwen; Yang, Qing; Li, Xuan; Wang, Xuchao; Wang, Xiuli; Guo, Xin; Li, Can

doi:10.1016/j.joule.2018.11.026

Cited by 483 publications

(491 citation statements)

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“…The large penetration depth broadens the distance between the NH 3 + and the nearest I (Supporting Information, Figure S4), and correspondingly weakens electronic interaction and the hydrogen bonding, leading to large Sn‐I‐Sn angles (Supporting Information, Table S2). It has been reported that the penetration depth influences the octahedral distortion, which expressed in their physical properties . The large Sn‐I‐Sn angles suggests small distortion with high crystal symmetry of (BEA)FA 2 Sn 3 I 10 , which shows an approaching band gap with respect to 3D FASnI 3 (details in the following discussion).…”

Section: Resultsmentioning

confidence: 91%

“…Furthermore, the perovskite layers in the (BEA)FA n −1 Sn n I 3 n +1 ( n >1) structure is slightly offset (Figure d) owing to the soft character of macromolecular ligand, which caused large penetration depth (defined by the distance between the primary NH 3 + and the plane of terminal iodides) of NH 3 + groups . The penetration depth of (BEA)FA n −1 Sn n I 3 n +1 ( n >1) is 0.923 Å (Supporting Information, Figure S3), which is much larger than the previous report on DJ structures . The large penetration depth broadens the distance between the NH 3 + and the nearest I (Supporting Information, Figure S4), and correspondingly weakens electronic interaction and the hydrogen bonding, leading to large Sn‐I‐Sn angles (Supporting Information, Table S2).…”

Section: Resultsmentioning

confidence: 98%

“…Thus, great progress has been made in the systematic study of 2DRP Sn‐based perovskites. Apart from RP perovskite, 2D perovskites also contain a more stable Dion–Jacobson (DJ) structure owing to the alternating hydrogen bonding interactions between diammonium cations and inorganic slabs . Unlike RP phases (1/2, 1/2 displacements), the DJ phases feature short divalent +2 cations between the layers, which yield an eclipsed stacking arrangement (0, 0 displacements) that weakens the quantum confinement .…”

Section: Introductionmentioning

confidence: 99%

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Low‐Dimensional Dion–Jacobson‐Phase Lead‐Free Perovskites for High‐Performance Photovoltaics with Improved Stability

et al. 2020

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1,4‐butanediamine (BEA) is incorporated into FASnI3 (FA=formamidinium) to develop a series of lead‐free low‐dimensional Dion–Jacobson‐phase perovskites, (BEA)FAn−1SnnI3n+1. The broadness of the (BEA)FA2Sn3I10 band gap appears to be influenced by the structural distortion owing to high symmetry. The introduction of BEA ligand stabilizes the low‐dimensional perovskite structure (formation energy ca. 106 j mol−1), which inhibits the oxidation of Sn2+. The compact (BEA)FA2Sn3I10 dominated film enables a weakened carrier localization mechanism with a charge transfer time of only 0.36 ps among the quantum wells, resulting in a carrier diffusion length over 450 nm for electrons and 340 nm for holes, respectively. Solar cell fabrication with (BEA)FA2Sn3I10 delivers a power conversion efficiency (PCE) of 6.43 % with negligible hysteresis. The devices can retain over 90 % of their initial PCE after 1000 h without encapsulation under N2 environment.

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Low‐Dimensional Dion–Jacobson‐Phase Lead‐Free Perovskites for High‐Performance Photovoltaics with Improved Stability

et al. 2020

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“…Later on, Ma et alreport a 13% efficiency using 1,3‐diaminopropane as spacer with methylammonium chloride (MACl), dimethyl sulfoxide (DMSO) as additive. After that, Ahmad et al reported a highly efficient 13.3% DJ phase PSCs with thousand hours ultrahigh stability using the same molecule. Zheng et al reported 16.38% efficiency DJ PSCs with MAAc molten salt as solvent; Li et al reported 14.86% efficiency for (BEA) 0.5 MA 3 Pb 3 I 10 DJ PSCs.…”

Section: Introductionmentioning

confidence: 99%

Interlayer Cross‐Linked 2D Perovskite Solar Cell with Uniform Phase Distribution and Increased Exciton Coupling

et al. 2020

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A nonuniform vertical phase distribution and thick insulating barrier can decrease the energy transfer between slices in layered perovskite solar cells (PSCs). Herein, an interlayer cross‐linked Dion–Jacobson (DJ)‐type 2D PSC with 1,4‐butanediamine (BDA) as a short‐chain insulating spacer [formula: (BDA)MAn −1PbnI3n + 1] is reported and demonstrates the vertical phase becoming uniform with enhanced exciton coupling, leading to reduced nonradiative recombination. For n = 1 pure phase perovskite, an exciton binding energy of the DJ phase (BDA)PbI4 is ≈142 meV, much smaller than ≈435 meV of Ruddlesden–Popper (RP) phase (BA)2PbI4 (n = 1) perovskite, indicative of exciton‐coupling‐induced efficient energy transfer. Therefore, the high energy emission peaks for the (BDA)MA3Pb4I13 film are not observed even in liquid nitrogen temperature (78 K), which can be distinguished from that of the (BA)2MA3Pb4I13 film. Energy transfer between 2D slices of (BDA)MA3Pb4I13 is 100 times faster than that of (BA)2MA3Pb4I13. The uniform vertical distribution and exciton coupling mitigate nonradiative energy loss and significantly improve Voc in inverted structures (PEDOT:PSS/(BDA)MA3Pb4I13/PCBM/bathocuproine/Ag) to ≈1.15 V and the control n‐butylammonium‐based device demonstrates only a Voc = ≈1 V. It is believed that the results would provide a deep understanding of exciton coupling in hybrid multicomponent quantum wells.

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“…For an ideal 3D perovskite structure, a t-value of 1 is desired and within the allowed range between 0.8 and 1, tilting of the BX 6 octahedra is noted , leading to a quasi-ideal perovskite structure. In addition, perovskites can dispose into layered phases constituting 2D BX 6 octahedra with interspersed cations forming the so-called Ruddlesden-Popper, [12] Aurivillius, [13] and Dion-Jacobson phases [14] (see Panel A, Figure 1). [4,5] This model determining geometry, shape, and size of crystal motifs is particularly applicable for fluorides and oxides because of their high electronegativities making the nature of their bonding increasingly ionic.…”

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confidence: 99%

Perovskites for Laser and Detector Applications

Das

Gholipour

Saliba

2019

Energy & Environ Materials

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Formally, perovskites have an ABX 3 structure where the A-site ion occupies a central cavity enclosed by corner shared octahedral BX 6 moieties forming a cubic crystal structure. Because of the formal stoichiometry requirement, that is, q A + q B = 3q X (q X is the charge of ion X), only certain elements are allowed to act as the X-site ion in the perovskites crystal structure. [1] Usually, the most common are the oxides with X = O (e.g., CaTiO 3 , SrTiO 3 , and KTaO 3 ) or the halides with X = F, Cl, Br, or I. To fit into an ideal cubic perovskite, the A-site cation has to be larger than B-site and thus specific size conditions need to be satisfied. This size requirement, as well as structural stability, is captured by the so-called Goldschmidt's tolerance factor (GTF) (t ¼ rAþrX ffiffi 2 p ðrBþrXÞ ) [2] along with the octahedral factor (l ¼ rB rX ), [3] where r X simply refers to the radius of the ion X. For an ideal cubic crystal structure, as in many 3D halide perovskites, the conditions 0.8 ≤ t ≤1 and 0.44 ≤ µ ≤ 0.90 need to be satisfied. For an ideal 3D perovskite structure, a t-value of 1 is desired and within the allowed range between 0.8 and 1, tilting of the BX 6 octahedra is noted , leading to a quasi-ideal perovskite structure. Contrarily, t-values larger than 1 or lower than 0.8 lead to formation of hexagonal and non-cubic structures, respectively. [4,5] This model determining geometry, shape, and size of crystal motifs is particularly applicable for fluorides and oxides because of their high electronegativities making the nature of their bonding increasingly ionic. [6] However, deviation from tolerance factor has been observed for many metal-organic framework-based perovskites (e.g., ABX 3 formats) [7] or ammonium halide perovskites with A-cation larger than methyl or formamidinium. [7,8] The pertinent reason in such cases is that r X cannot be clearly defined for the covalently bonded organic moieties in the perovskite framework. The tolerance factors have been thus revised using Kieslich model of effective ionic radii, [7] and molecular globularity model by Gholipour et al. [8] The ammonium halide-based hybrid perovskites mentioned above dispose into tunable structures, phases, dimensionalities, and morphologies (see Figure 1). Generally, a perovskite unit cells can multiply forming double perovskites like Ba 2 CaTeO 6 and Sr 2 FeMoO 6[9] or triple perovskites, [10] for example, Ba 2 KNaTe 2 O 9 or anti-perovskites [11] (see Panel A, Figure 1). In addition, perovskites can dispose into layered phases constituting 2D BX 6 octahedra with interspersed cations forming the so-called Ruddlesden-Popper, [12] Aurivillius, [13] and Dion-Jacobson phases [14] (see Panel A, Figure 1). For a structural configuration (RNH 3 ) 2 A n À 1 B n X 3n + 1 where R is an organic group, the perovskite dimensionalities are dictated by integer values of n which represents the number of inorganic layers enveloped by organic cations. [5,15] An nvalue of 1 yields pure 2D perovskites, and n-value of 1 gives 3D perovskites wh...

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Dion-Jacobson Phase 2D Layered Perovskites for Solar Cells with Ultrahigh Stability

Cited by 483 publications

References 38 publications

Low‐Dimensional Dion–Jacobson‐Phase Lead‐Free Perovskites for High‐Performance Photovoltaics with Improved Stability

Low‐Dimensional Dion–Jacobson‐Phase Lead‐Free Perovskites for High‐Performance Photovoltaics with Improved Stability

Interlayer Cross‐Linked 2D Perovskite Solar Cell with Uniform Phase Distribution and Increased Exciton Coupling

Perovskites for Laser and Detector Applications

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