High-Performance CH3NH3PbI3-Inverted Planar Perovskite Solar Cells with Fill Factor Over 83% via Excess Organic/Inorganic Halide

Jahandar, Muhammad; Khan, Nasir; Lee, Hang Ken; Lee, Sang Kyu; Shin, Won Suk; Lee, Mi Kyung; Song, Chang Eun; Moon, Sang‐Jin

doi:10.1021/acsami.7b11083

Cited by 39 publications

(29 citation statements)

References 59 publications

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“…Figure 1d compares the 2D-GIWAXS patterns of the MAPbI 3 and MAPbI 3 :L-alanine films. Clearly, the strong diffraction pattern at q x,y = 1.0 Å −1 , which is associated with the (110) plane, [41] can be observed in both the MAPbI 3 and MAPbI 3 :L-alanine films. However, we noticed an addition of strong diffraction rings around q x,y = 2.0 Å −1 in the MAPbI 3 :L-alanine films, which are associated with the (220) plane.…”

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confidence: 95%

Simultaneously Passivating Cation and Anion Defects in Metal Halide Perovskite Solar Cells Using a Zwitterionic Amino Acid Additive

Kim

Park

et al. 2020

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Ionic defects (e.g., organic cations and halide anions), preferably residing along grain boundaries (GBs) and on perovskite film surfaces, are known to be a major source of the notorious environmental instability of perovskite solar cells (PeSCs). Although passivating ionic defects is desirable, previous approaches using Lewis base or acid molecules as additives suppress only the negatively or positively charged defects, thus leaving oppositely charged defects. In this work, both the cationic and anionic defects inside methyl ammonium lead tri‐iodide (MAPbI3) are simultaneously passivated by introducing a zwitterionic form of the amino acid, L‐alanine, into the precursor solution as an additive. L‐alanine has both positive (NH3+) and negative (COO−) functional groups at a specific solvent pH, thereby passivating both the cation and anion defects in MAPbI3. The addition of L‐alanine increases the grain size of the perovskite crystals and lengthens the charge carrier lifetime (τ > 1 µs), leading to improved power conversion efficiencies (PCEs) of 20.3% (from 18.3% without an additive) for small‐area (4.64 mm2) devices and 15.6% (from 13.5%) for large‐area submodules (9.06 cm2). More importantly, the authors’ approach also significantly enhances the shelf storage and photoirradiation stabilities of PeSCs.

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confidence: 95%

Simultaneously Passivating Cation and Anion Defects in Metal Halide Perovskite Solar Cells Using a Zwitterionic Amino Acid Additive

Kim

Park

et al. 2020

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“…Several studies have investigated the effect of stoichiometry on device performance and, in some cases, stability, with conflicting results showing that either excess PbI2 6,[11][12][13][14][15] or an excess of anions (I, Br, Cl) and cations (MA, FA, Cs) 8,10,[16][17][18] is beneficial for efficiency and/or stability. The observed discrepancies could stem from the variety of perovskite recipes and the impact of the different extraction layers used in complete cells, as these factors strongly affect the properties of the active layer (e.g.…”

Section: Introductionmentioning

confidence: 99%

Fractional deviations in precursor stoichiometry dictate the properties, performance and stability of perovskite photovoltaic devices

Faßl

Lami

Bausch

et al. 2018

Energy Environ. Sci.

143

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“…Figure f and Table S3, Supporting Information, summarize almost all the works with FF higher than 80% published in recent years. As can be seen from the figure, our work achieved more balanced performance with a simple dosing strategy than most of the other's work …”

Section: Resultsmentioning

confidence: 74%

Synergy of Plasmonic Silver Nanorod and Water for Enhanced Planar Perovskite Photovoltaic Devices

et al. 2019

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Perovskite solar cells (PSCs) have been widely studied during the past 10 years. Albeit the excellent light‐absorption ability, the thickness of the perovskite layer is limited to maintain effective control over morphology and carrier migration. Meanwhile, the quality of perovskite films is a crucial factor affecting the performance of final devices. The traditional one‐step process for preparing triple‐cation perovskite films suffers from small grain size, low crystallization quality, and many surface defects. Herein, in the process of triple‐cation perovskite‐based solar cells, a facile dosing strategy of a silver nanorods (AgNR) aqueous solution into the perovskite precursor is adopted. The localized surface plasmon resonance effect of AgNR enhances the light‐capture ability of the perovskite layer without increasing the thickness. At the same time, the presence of appropriate water helps to obtain high‐quality perovskite films with larger grain size and fewer defects. It is found that the synergy of AgNR and water successfully reduces the defect density and increases mobility significantly. Consequently, a power conversion efficiency of 20.18% and a short‐circuit current (JSC) of 22.08 mA cm−2 is achieved. Meanwhile, an excellent fill factor beyond 82% is reported, which is one of the highest values for triple‐cation hybrid PSCs.

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High-Performance CH₃NH₃PbI₃-Inverted Planar Perovskite Solar Cells with Fill Factor Over 83% via Excess Organic/Inorganic Halide

Cited by 39 publications

References 59 publications

Simultaneously Passivating Cation and Anion Defects in Metal Halide Perovskite Solar Cells Using a Zwitterionic Amino Acid Additive

Simultaneously Passivating Cation and Anion Defects in Metal Halide Perovskite Solar Cells Using a Zwitterionic Amino Acid Additive

Fractional deviations in precursor stoichiometry dictate the properties, performance and stability of perovskite photovoltaic devices

Synergy of Plasmonic Silver Nanorod and Water for Enhanced Planar Perovskite Photovoltaic Devices

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