Sn Perovskite Solar Cells via 2D/3D Bilayer Formation through a Sequential Vapor Process

Choi, Won‐Gyu; Park, Chan-Gyu; Kim, Yongmin; Moon, Taeho

doi:10.1021/acsenergylett.0c01887

Cited by 58 publications

(50 citation statements)

References 32 publications

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“…Non [203] GABr ITO/SnO 2 /CsPb(Br x I 1-x ) 3 /Spiro-OMeTAD/Au 15.6% (0.06 cm 2 ) 88% of initial PCE, 1440 h, 76% of initial PCE, 720 h, 80 °C 90% of initial PCE, 300 min, 1 sun Non [204] PEACl FTO/TiO 2 /CsPbI 2 Br/PEACl/PTAA/Au 15.6% (0.09 cm 2 ) 80% of initial PCE, 12 h, 60% RH Non [205] PEAI ITO/NiO x /FASnI 3 /PEA 2 SnI 4 /C 60 /BCP/Ag 9.41% (0.09 cm 2 ) 90% of initial PCE, 600 h, N 2 Bulk doping [126] PEAI ITO/PEDOT/FASnI 3 /PEA 2 SnI 4 /C 60 /Au 9.41% (0.09 cm 2 ) 40% of initial PCE, 20 h, 46%-54% RH, 23-24 °C Non [206] TSC ITO/PEDOT/CsSnI 3 /TSC/C 60 /BCP/Cu 8.20% (/) 71% of initial PCE, 500 h, 1 sun, N 2 Non [207] © high photovoltaic performance in the PSCs (Figure 16c), in which the 2D (C 4 H 9 NH 3 ) 2 PbI 4 perovskite acted as a passivation layer endowed with a V oc of 1.185 V and a PCE of 24.35% (Figure 16b). Meanwhile, the passivated PSCs retained 94% of their initial efficiency after 1056 h under 85 °C/85% relative humidity conditions and 98% after 1620 h under sun illumination (see in Figure 16d).…”

Section: Organic-inorganic Lead Pscs With the Formal Structurementioning

confidence: 99%

“…[207,[216][217][218][219][220][221][222] Moon and co-workers first deposited 2D PEA 2 SnI 4 on the surface of 3D MASnI 3 perovskites by a sequential vapour process (the method processing is shown in Figure 19a). [206] The incorporated 2D perovskites conferred the ability to suppress Sn oxidation and grow uniform Sn-based perovskite heterostructure films. As a result, the treated device achieved a superior PCE of 9.2% ± 0.2% under the optimized thickness of the 2D capping layer (as shown in Figure 19b).…”

Section: Wwwadvmatde Wwwadvancedsciencenewscommentioning

confidence: 99%

“…Tremendous efforts have been devoted to exploring the passivation process, including solution spin-coating, vacuum deposition, and solid-SIG, which significantly affect the [206] Copyright 2020, American Chemical Society. c) Schematic diagram for the formation of quasi-2D/3D heterostructure film (Sn-based).…”

Section: Passivation Processmentioning

confidence: 99%

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Surface Passivation Using 2D Perovskites toward Efficient and Stable Perovskite Solar Cells

Wu¹,

Liang²,

et al. 2022

Advanced Materials

323

208

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first solid-state perovskite solar cell (PSC) was successfully prepared by introducing Sprio as a hole transport layer (HTL), tremendous efforts have been devoted to further promoting the photovoltaic performance, including surface passivation, bulk doping, processing engineering, and optimizing the structure of the device. [9][10][11][12][13][14][15][16][17][18][19][20][21] Consequently, the power conversion efficiency (PCE) of PSCs has dramatically increased from the initial 9% to an impressive 25.2% in several years. [22,23] To date, the coexistence of high efficiency and long-term stability has become a crucial requirement for successful PSC applications. 2D perovskites (consisting of pure 2D and quasi-2D perovskites) have emerged as a new family of photovoltaic materials that have been proven to resolve the problem of instability in perovskites. Owing to the insulating spacer layer, inherent outstanding long-term stability is obtained in 2D perovskites, including hydrophobicity, suppression of ion migration, and larger formation energy. [24][25][26][27][28] However, severe carrier recombination occurs due to the combined effect of quantum confinement and dielectric confinement, rooted in the natural multiple quantum wells structure (MQWs) (Figure 1), where the inorganic parts act as potential "wells" while the organic parts act as "walls", which shows a boost in the photovoltaic performance of 2D PSCs. [29][30][31] To realize the coexistence of high efficiency and ultrastability in PSCs, researchers began to construct 2D/3D heterostructures by surface passivation. [32][33][34][35][36][37][38][39][40] In fact, before the boosting of the 2D/3D stacking concept, many researchers have applied large ammonium cations (such as phenethylamine (PEA), butylamine (BA), and quaternary ammonium (QA)) as defect passivants to 3D perovskite solar cells. [41][42][43][44][45] During this period, the pure PEA-or BA-based 2D perovskites have been explored as light-absorbing materials for better stability. [25,46] In 2015, Yao et al. introduced in situ grown 2D perovskite (PEI) 2 PbI 4 (PEI: polymeric ammonium) on an MAPbI 3 film, leading to more stable and efficient PSCs. [47] In 2016, discussions and analyses of the surface passivation effect began to emerge, which involved exploring a series of 2D perovskite molecules (such as aniline, benzylamine, and PEA). [42,45,48] The concept of 2D/3D stacking really stood out in 2018 by unveiling the chemical reaction mechanism for heterojunction formation and the mechanism for enhancing stability. For example, Huang 3D perovskite solar cells (PSCs) have shown great promise for use in next-generation photovoltaic devices. However, some challenges need to be addressed before their commercial production, such as enormous defects formed on the surface, which result in severe SRH recombination, and inadequate material interplay between the composition, leading to thermal-, moisture-, and light-induced degradation. 2D perovskites, in which the organic layer functions as a protective barrier ...

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Section: Organic-inorganic Lead Pscs With the Formal Structurementioning

confidence: 99%

Section: Wwwadvmatde Wwwadvancedsciencenewscommentioning

confidence: 99%

See 1 more Smart Citation

Surface Passivation Using 2D Perovskites toward Efficient and Stable Perovskite Solar Cells

Wu¹,

Liang²,

et al. 2022

Advanced Materials

323

208

View full text Add to dashboard Cite

show abstract

“…Unlike the abovementioned solution processing, recently, Choi et al introduced a bilayer structures of 2D PEA 2 SnI 4 and 3D MASnI 3 perovskites via sequential vapor processes. [165] The Sn 2þ oxidation was suppressed and the crystallinity of 3D layer was improved, resulting in a device with an average PCE of 9.2 AE 0.2%, which was attributable to the formation of a uniform upper layer. Surprisingly, the FPEABr was introduced into FASnI 3 precursor solution and obtained 2D/3D microstructure in which 2D phase embraces 3D grains and was located at the surface and GBs.…”

Section: D Perovskite With a 2d Perovskite Capping Layermentioning

confidence: 99%

Advances in Tin(II)‐Based Perovskite Solar Cells: From Material Physics to Device Performance

Gong

et al. 2021

Small Structures

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During the past decade, metal halide perovskites are widely studied in the field of optoelectronic materials due to their unique optical and electrical properties. Lead‐based halide perovskite solar cells (PSCs), in particular, currently achieve a record efficiency of 25.5%, thus showing strong potential in industrial application. However, toxicity of lead‐based perovskite materials possesses great concerns to natural environment and human body. Therefore, the quest for nontoxic and eco‐friendly elements to replace lead in perovskites is of great interest. Among all the element choices, tin(II) (Sn2+) is the most promising candidate. As a rising star of lead‐free PSCs, Sn‐based PSCs have drawn much attention and made promising progress during the past few years. While the rapid oxidation and decomposition of Sn‐based perovskites result in poor stability and low efficiency of PSCs. In this review, structural, optoelectronic properties and the critical issues of Sn‐based perovskite materials are analyzed. Then, a detailed discussion on the recent methods in solving critical issues of Sn‐based perovskite devices, from optimization on materials physics to device performance, is also presented. Finally, remaining challenges and future perspective are given to advance the progression of Sn‐based PSCs.

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“…[8][9] In addition, PEAI increases black phase stability, [10] as in all-inorganic perovskite CsPbI3 stabilizing the orthorhombic black phase (γ-CsPbI3) under ambient condition and to avoid the yellow -CsPbI3 formation, achieving high open circuit voltage over 1.3 V. [11] Moreover, pure 2D (PEA)2PbI4 perovskite films prepared by blade-coating has an highly crystalline nature [12] and pure 2D (PEA)2SnI4 prepared by sequential vapor process of PEAI/SnI2 shows less tendency to Sn oxidation. [13] Besides, the PEA + cation has hydrophobic nature, which improves the moisture resistance of interfaces perovskite/transporting layers. In this sense, PEA + cation is considered an excellent additive if it is added properly in the 3D halide perovskite thin film.…”

Section: Introductionmentioning

confidence: 99%

Interface Engineering in Perovskite Solar Cells by Low Concentration of Phenylethyl Ammonium Iodide Solution in the Antisolvent Step

et al. 2021

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Sn Perovskite Solar Cells via 2D/3D Bilayer Formation through a Sequential Vapor Process

Cited by 58 publications

References 32 publications

Surface Passivation Using 2D Perovskites toward Efficient and Stable Perovskite Solar Cells

Surface Passivation Using 2D Perovskites toward Efficient and Stable Perovskite Solar Cells

Advances in Tin(II)‐Based Perovskite Solar Cells: From Material Physics to Device Performance

Interface Engineering in Perovskite Solar Cells by Low Concentration of Phenylethyl Ammonium Iodide Solution in the Antisolvent Step

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