Efficient Slantwise Aligned Dion–Jacobson Phase Perovskite Solar Cells Based on Trans‐1,4‐Cyclohexanediamine

Wang, Han; Qin, Zhaotong; Xie, Jiangsheng; Zhao, Shenghe; Liu, Kuan; Guo, Xinlu; Li, Gang; Lu, Xinhui; Yan, Keyou; Xu, Jianbin

doi:10.1002/smll.202003098

Cited by 39 publications

(35 citation statements)

References 38 publications

(53 reference statements)

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“…[ 7,8 ] It is found that the ultrathin thickness and large specific area of nanosheets can bring perovskites some attractive optical, photochemical, or electric properties (e.g., high photoluminescence efficiency, large photoconductive gain, etc. ), which expands their potential for fabricating devices with various photo‐induced functionalities such as solar cells [ 9–12 ] and light‐emitting diodes, [ 13,14 ] as well as high‐performance photodetectors (PDs). [ 15,16 ]…”

Section: Introductionmentioning

confidence: 99%

Boosted Responsivity and Tunable Spectral Response in B‐Site Substituted 2D Ca₂Nb₃₋_xTa_xO₁₀ Perovskite Photodetectors

Liu

et al. 2021

Adv Funct Materials

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2D Dion‐Jacobson perovskite oxides, featuring fascinating optical and electric properties, exhibit great potential in optoelectronic devices. However, the device sensitivity and spectral selectivity are limited. Herein, B‐site substituted calcium niobate Ca2Nb3−xTaxO10 (x = 0, 0.5, 1, 1.5) nanosheets are prepared by liquid exfoliation. The photodetectors (PDs) based on these nanosheets exhibit tunable spectral response by tailoring the band gap of the nanosheets. All the Ta‐substituted PDs show increased photocurrent and enhanced responsivity, among which the Ca2Nb2.5Ta0.5O10 PD exhibits the optimal performance with a photocurrent of 31.4 µA, a high on–off ratio of 5.6 × 104 and a boosted responsivity of 469.5 A W−1 at 1.0 V toward 295 nm, which is over 7000‐fold higher than that of pristine Ca2Nb3O10 PD. It is proposed that the significantly optimized responsivity is ascribed to the enhanced photoconductive gain that mainly originates from the introduction of the trap states by the B‐site substitution. Nevertheless, excess substitution is detrimental to the responsivity and the response speed. This work demonstrates that the rational control of B‐site substitution tailors the band gap and modulates the charge‐carrier behaviors in 2D perovskite oxides, which provides an effective avenue for achieving high‐performance PDs with tunable spectral response and excellent responsivity.

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Section: Introductionmentioning

confidence: 99%

Boosted Responsivity and Tunable Spectral Response in B‐Site Substituted 2D Ca₂Nb₃₋_xTa_xO₁₀ Perovskite Photodetectors

Liu

et al. 2021

Adv Funct Materials

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“…Indeed, solar cells built with trans-1,4-cyclohexanediamine retained 95% PCE after >1000 h of storage in 50-60% humidity. [139] In the same study, solar cells incorporating a linear alkyl chain-1,6-diaminohexane-dropped to 41% of initial PCE in less than 200 h.…”

Section: Phase Stability Of Dion-jacobson Perovskitesmentioning

confidence: 89%

“…The higher stability of the DJ materials translates into significantly longer lifetimes reported for DJ-phase PSCs, as compared to the RP counterparts. [25,138,139] Specifically, the more rigid and robust DJ structure has been shown to provide improved stability of devices toward humidity, heat, and light. [139][140][141][142] For example, replacing the pentylammonium PA cation with 1,3-propanediammonium DJ-spacer in (PDA) (MA) 3 Pb 4 I 13 results in remarkable stability enhancement toward humidity.…”

Section: Phase Stability Of Dion-jacobson Perovskitesmentioning

confidence: 99%

“…[25,138,139] Specifically, the more rigid and robust DJ structure has been shown to provide improved stability of devices toward humidity, heat, and light. [139][140][141][142] For example, replacing the pentylammonium PA cation with 1,3-propanediammonium DJ-spacer in (PDA) (MA) 3 Pb 4 I 13 results in remarkable stability enhancement toward humidity. [25] Here, devices retain 95% of the initial PCE after continuous aging for 168 h under 85 °C and RH 85% conditions; devices under standard light soaking conditions, retain 95% of the initial PCE for 3000 h. Furthermore, partial or full substitution of the MA-cation with the more thermally stable FA can lead to stability improvements.…”

Section: Phase Stability Of Dion-jacobson Perovskitesmentioning

confidence: 99%

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

Sirbu

Balogun

Milot

et al. 2021

Advanced Energy Materials

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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...

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“…[130] Other modification engineering has also been applied in DJ phase PSCs, such as molecule doping (Cl − , SCN − ), antisolvents, and hot casting processing, which broaden the horizons of 2D perovskite for achieving high photovoltaic performance of PSCs. [129][130][131][132][133][134][135][136][137][138][139][140][141][142]…”

Section: Dj Phase Pscsmentioning

confidence: 99%

2D Hybrid Halide Perovskites: Structure, Properties, and Applications in Solar Cells

Liang

Zhang

et al. 2021

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Abstract2D metal‐halide perovskites have attracted intense research interest due to superior long‐term stability under ambient environments. Compared to their 3D analog, the alternate arrangement of organic and inorganic layers leads to forming a multilayer quantum well (MQW), which endows 2D perovskites with anisotropic optoelectronic properties. In addition, the spacer layer functions as a hydrophobic barrier to effectively prevent 2D perovskite films from ion migration and moisture penetrating, thus realizing outstanding stability. Recently, 2D perovskites have been widely developed with abundant species. The stunning photovoltaic performance with the coexistence of long‐term stability and high‐power conversion efficiency (PCE) has been realized in 2D perovskite solar cells (PSCs), which paves an avenue for commercialization of PSCs. This review begins with an introduction of crystal structure and crystallization kinetics to illustrate the unique layer characters in 2D perovskites. Then, electron structure, excitons, dielectric confinement, and intrinsic stability properties are discussed in detail. Next, the photovoltaic performance based on recent Ruddlesden–Popper (RP), Dion–Jacobson (DJ), and alternating cations in the interlayer (ACI) phase 2D‐PSCs is comprehensively summarized. Finally, the confronting challenges and strategies toward structural design and optoelectronic studies of 2D perovskites are proposed to offer insight into the advanced underlying properties of this family of materials.

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Efficient Slantwise Aligned Dion–Jacobson Phase Perovskite Solar Cells Based on Trans‐1,4‐Cyclohexanediamine

Cited by 39 publications

References 38 publications

Boosted Responsivity and Tunable Spectral Response in B‐Site Substituted 2D Ca₂Nb₃₋_xTa_xO₁₀ Perovskite Photodetectors

Boosted Responsivity and Tunable Spectral Response in B‐Site Substituted 2D Ca₂Nb₃₋_xTa_xO₁₀ Perovskite Photodetectors

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

2D Hybrid Halide Perovskites: Structure, Properties, and Applications in Solar Cells

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Efficient Slantwise Aligned Dion–Jacobson Phase Perovskite Solar Cells Based on Trans‐1,4‐Cyclohexanediamine

Cited by 39 publications

References 38 publications

Boosted Responsivity and Tunable Spectral Response in B‐Site Substituted 2D Ca2Nb3−xTaxO10 Perovskite Photodetectors

Boosted Responsivity and Tunable Spectral Response in B‐Site Substituted 2D Ca2Nb3−xTaxO10 Perovskite Photodetectors

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

2D Hybrid Halide Perovskites: Structure, Properties, and Applications in Solar Cells

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Product

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Boosted Responsivity and Tunable Spectral Response in B‐Site Substituted 2D Ca₂Nb₃₋_xTa_xO₁₀ Perovskite Photodetectors

Boosted Responsivity and Tunable Spectral Response in B‐Site Substituted 2D Ca₂Nb₃₋_xTa_xO₁₀ Perovskite Photodetectors