Enhanced efficiency and stability of perovskite solar cells by 2D perovskite vapor-assisted interface optimization

Chen, Ming‐Hui; Li, Pengwei; Liang, Chao; Gu, Hao; Tong, Weishuang; Cheng, Shiping; Li, Weili; Zhao, Gan-Qing; Shao, Guosheng

doi:10.1016/j.jechem.2019.10.006

Cited by 36 publications

(12 citation statements)

References 44 publications

(47 reference statements)

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“…(d) PCEs statistic of 30 devices for each group of perovskite solar cell. (e) Stability measurements conducted under ambient atmospheric . Adapted with permission from ref .…”

Section: Improving the Humidity Stability Of Pscsmentioning

confidence: 99%

Section: Improving the Humidity Stability Of Pscsmentioning

confidence: 99%

“…Chen et al reported that the reaction of a three-dimensional (3D) perovskite with 1,4-butanediamine iodide (BEAI 2 ) steam could promote the crystallization of large-grain (∼500 nm) perovskite films to obtain efficient and stable PSCs. 100 They evenly spread the BEAI 2 powder on the MAPbI 3 surface and then annealed it at 110 °C for 1 h in a N 2 atmosphere (Figure 4a). BEAI 2 can easily react with PbI 2 to form a twodimensional (2D) perovskite BEAPbI 4 , thus constituting a 2D/3D stacked structure.…”

Section: Improving the Humidity Stability Of Pscsmentioning

confidence: 99%

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Recent Progress on the Stability of Perovskite Solar Cells in a Humid Environment

et al. 2020

J. Phys. Chem. C

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In recent years, photovoltaic devices based on inorganic–organic hybrid perovskite materials have become one of the most promising research subjects in the field of energy conversion. CH3NH3PbI3 stands out among a wide variety of perovskite structural materials with the advantages of a suitable band structure, small exciton binding energy, long carrier diffusion distance, and so on. Unfortunately, the CH3NH3PbI3 perovskite undergoes severe degradation under humid conditions, which limits the service life of the device. To address this issue, researchers have recently discovered that the humidity stability of perovskite solar cells (PSCs) can be improved through doping or interfacial engineering. Here, we have reviewed the state of the research progress in improving the humidity stability of PSCs, including (a) improving the structural stability of perovskite material itself by doping or element substitutions; (b) interface engineering between the hole transport layer and the perovskite active layer; (c) interface modification between the electron transport layer and the perovskite layer; and (d) encapsulation. The strategy of improving the humidity stability of CH3NH3PbI3 by optimizing the device structure and developing new materials is summarized. We also make constructive suggestions for improving the stability of PSCs in humid environments.

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“…(d) PCEs statistic of 30 devices for each group of perovskite solar cell. (e) Stability measurements conducted under ambient atmospheric . Adapted with permission from ref .…”

Section: Improving the Humidity Stability Of Pscsmentioning

confidence: 99%

Section: Improving the Humidity Stability Of Pscsmentioning

confidence: 99%

Section: Improving the Humidity Stability Of Pscsmentioning

confidence: 99%

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Recent Progress on the Stability of Perovskite Solar Cells in a Humid Environment

et al. 2020

J. Phys. Chem. C

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“…Organic–inorganic hybrid perovskite as the new semiconductor material has been widely used in solar cells and photodetectors. − The unique set of intriguing optoelectronics of perovskite materials, such as high light absorption, , high carrier mobility, , and long intrinsic carrier recombination lifetime, , promote the efficiency of perovskite solar cells (PSCs) beyond 25% with a relatively simple and low-cost preparation method. , The enhancement of efficiency for polycrystalline film devices can attribute to the improvement of thin-film preparation and decrease of charge recombination loss both inside and on the surface of the photoactive layer. − Highly efficient solar cells are usually obtained with Pb-based perovskite materials, general chemical formula of APbX 3 , where A is Cs + , methylammonium (MA + = CH 3 NH 3 + ), or formamidinium (FA + = CH(NH 2 ) 2 + ) and X is the halide anions (I – , Br – , and Cl – ). − …”

Section: Introductionmentioning

confidence: 99%

Cation Engineering for Effective Defect Passivation to Improve Efficiency and Stability of FA_0.5MA_0.5PbI₃Perovskite Solar Cells

Yang

You

Zhang

et al. 2021

ACS Appl. Energy Mater.

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Large organic cations have been widely employed to passivate defects in perovskite solar cells (PSCs). In this research, we study how double ions influence PSC developments. Four additives, namely, BAI, BACl, PEAI, and PEACl, were introduced into the precursor solution during the hybrid PSC preparation, and it is found that they not only improve the crystallization of the perovskite films but also passivate the surface and grain boundary defects, leading to improved PSC performance. BACl is found to be the best among this group of additives, giving the highest solar cell efficiency and the best stability. This work provides insights and guidelines as to how amine additives influence perovskite film formation as well as device performance, which is badly needed for PSC advancement.

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“…Hence, knowledge of the thermodynamic parameters of the bulk perovskites benefits this exploration more effectively. Additionally, various other studies report favorable, extrinsic stability of DJ perovskite thin films or devices by utilizing diammonium cations in the fabrication process. − The mixed A-site cation strategy propounds a critical component for enhanced stability in halide perovskites, as reported systematically in 3D lead iodide perovskites. − Most commonly, cationic mixtures of FA, Cs, and/or Rb have been shown to be more stable than single-cation MAPbI 3 . , Moreover, it has been experimentally observed that uniform-phase mixtures of MA/FA and FAPbI 3 present increased stability under device operating conditions, which may be due to the free energy of mixing or the smaller tendency toward deprotonation of FA, relative to MA . However, there have not yet been studies on the enthalpic/thermodynamic evaluation of cation mixtures experimentally. ,− Prospects for future work should be directed toward the thermodynamic evaluation of 3D and 2D perovskites with cationic mixtures, as well as the consideration of additional thermodynamic parameters such as the possible multiple degradation-transformation pathways of halide perovskites and entropic contributions.…”

Section: Results and Discussionmentioning

confidence: 96%

Insight on the Stability of Thick Layers in 2D Ruddlesden–Popper and Dion–Jacobson Lead Iodide Perovskites

et al. 2021

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Two-dimensional (2D) hybrid organic−inorganic halide perovskites are a preeminent class of low-cost semiconductors whose inherent structural tunability and attractive photophysical properties have led to the successful fabrication of solar cells with high power conversion efficiencies. Despite the observed superior stability of 2D lead iodide perovskites over their 3D parent structures, an understanding of their thermochemical profile is missing. Herein, the calorimetric studies reveal that the Ruddlesden−Popper (RP) series, incorporating the monovalentmonoammonium spacer cations of pentylammonium (PA) and hexylammonium (HA): (PA) 2 (MA) n-1 Pb n I 3n+1 (n = 2−6) and (HA) 2 (MA) n-1 Pb n I 3n+1 (n = 2−4) have a negative enthalpy of formation, relative to their binary iodides. In contrast, the enthalpy of formation for the Dion−Jacobson (DJ) series, incorporating the divalent and cyclic diammonium cations of 3-and 4-(aminomethyl)piperidinium (3AMP and 4AMP respectively): (3AMP)(MA) n-1 Pb n I 3n+1 (n = 2−5) and (4AMP)(MA) n-1 Pb n I 3n+1 (n = 2−4) have a positive enthalpy of formation. In addition, for the (PA) 2 (MA) n−1 Pb n I 3n+1 family of materials, we report the phasepure synthesis and single crystal structure of the next member of the series (PA) 2 (MA) 5 Pb 6 I 19 (n = 6), and its optical properties, marking this the second n = 6, bulk member published to date. Particularly, (PA) 2 (MA) 5 Pb 6 I 19 (n = 6) has negative enthalpy of formation as well. Additionally, the analysis of the structural parameters and optical properties between the examined RP and DJ series offers guiding principles for the targeted design and synthesis of 2D perovskites for efficient solar cell fabrication. Although the distortions of the Pb−I−Pb equatorial angles are larger in the DJ series, the significantly smaller I•••I interlayer distances lead to overall smaller band gap values, in comparison with the RP series. Our film stability studies on the RP and DJ perovskites series reveal consistent observations with the thermochemical findings, pointing out to the lower extrinsic stability of the DJ materials in ambient air.

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Enhanced efficiency and stability of perovskite solar cells by 2D perovskite vapor-assisted interface optimization

Cited by 36 publications

References 44 publications

Recent Progress on the Stability of Perovskite Solar Cells in a Humid Environment

Recent Progress on the Stability of Perovskite Solar Cells in a Humid Environment

Cation Engineering for Effective Defect Passivation to Improve Efficiency and Stability of FA_0.5MA_0.5PbI₃Perovskite Solar Cells

Insight on the Stability of Thick Layers in 2D Ruddlesden–Popper and Dion–Jacobson Lead Iodide Perovskites

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Enhanced efficiency and stability of perovskite solar cells by 2D perovskite vapor-assisted interface optimization

Cited by 36 publications

References 44 publications

Recent Progress on the Stability of Perovskite Solar Cells in a Humid Environment

Recent Progress on the Stability of Perovskite Solar Cells in a Humid Environment

Cation Engineering for Effective Defect Passivation to Improve Efficiency and Stability of FA0.5MA0.5PbI3Perovskite Solar Cells

Insight on the Stability of Thick Layers in 2D Ruddlesden–Popper and Dion–Jacobson Lead Iodide Perovskites

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Cation Engineering for Effective Defect Passivation to Improve Efficiency and Stability of FA_0.5MA_0.5PbI₃Perovskite Solar Cells