Ethyl acetate green antisolvent process for high-performance planar low-temperature SnO2-based perovskite solar cells made in ambient air

Zhang, Wenyuan; Li, Yuanchao; Liu, Xin; Tang, Dongyan; Li, Xin; Yuan, Xianglin

doi:10.1016/j.cej.2019.122298

Cited by 108 publications

(71 citation statements)

References 69 publications

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“…In the one-step spin-coating method, antisolvents can reduce the solubility of the perovskite in other solvents and accelerate its nucleation due to supersaturation, where EtOAc was shown to provide the highest PCEs (>17%) in ambient conditions under medium humidity (30-40% RH). [166] In the case of higher humidity (60-70% RH), MeOAc has been shown to be the best option producing a PCE of 16.3%. [164] In the twostep spin-coating method, IPA should be used to solubilize cationic salts since it provides the least harmful effects to the underlying PbI 2 layer.…”

Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

“…The best device fabricated under 50% RH achieved the highest PCE of 16.9%. Acetate group molecules including methyl acetate (MeOAc), [164] ethyl acetate (EtOAc), [165][166][167][168] propyl acetate (PrOAc), [93] and butyl acetate (BuOAc) are also considered favorable antisolvents for ambient fabrication. When DMSO, a common solvent for perovskite precursors, is used for perovskite film fabrication, it can slow down the reaction between MAI and PbI 2 and formed a MAI-PbI ] layers in i) PbI 2 which then form a ii) MAI-PbI 2 -DMSO intermediate to give iii) a uniform perovskite phase with corner-sharing octahedra via extraction of DMSO.…”

Section: Solvent Engineering: One-step Spin-coatingmentioning

confidence: 99%

“…The antisolvent which gave the highest PCE under medium humidity (<40% RH) conditions was EtOAc, due to its influence on the growth of the MAI-PbI 2 -DMSO intermediate and control of perovskite crystallization. [166] When the humidity is high (>60% RH), MeOAc is more suitable due to its high www.advancedsciencenews.com www.small-methods.com…”

Section: (13 Of 40)mentioning

confidence: 99%

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Ambient Fabrication of Organic–Inorganic Hybrid Perovskite Solar Cells

et al. 2020

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Unlike fossil fuels, the sun is an inexhaustible energy source that delivers more energy to the earth in 1 h than the entire planet consumes in one year. Energy can be harvested from the sun using photovoltaics (PV) and stored (e.g., batteries), meaning solar energy can be used as and when required. [3,4] Currently, the commercial PV market is dominated by single-junction crystalline silicon (c-Si) PV which deliver power conversion efficiencies (PCE) of over 26% under 1 Sun illumination (AM 1.5 standard). [5,6] Despite their high efficiencies, the fabrication of c-Si PV is nontrivial and lacks electronic tunability. Furthermore, the record efficiency for c-Si PV is 26.7% [5] which is very close to the theoretical limit of 29.4%. [7] This clearly indicates that c-Si PV is a mature technology and there is limited room for improvement. [8] Over the past two decades, third-generation solar cells such as dye-sensitized solar cells, [9,10] quantum dot solar cells, [11,12] organic solar cells, [13,14] and perovskite solar cells (PSCs) [15,16] have been developed as alternatives to c-Si technologies. Of these third-generation solar cells, single-junction PSCs have generated significant attention due to their intense visible to near-infrared absorptivity, [16-18] long diffusion lengths of the charge carriers, [19,20] high efficiency, [21,22] electronic and physical tunability, [23,24] and low manufacturing costs. [25,26] After the first report by Miyasaka's group in 2009, [27] the PCE for single junction devices increased considerably from 3.8% to 25.2%, [27,28] making it the fastest advancing PV technology to date. This has uniquely placed PSCs as the frontrunner technology to potentially replace or coexist with c-Si PV. The term "perovskite" refers to a group of compounds that share the same lattice structure as calcium titanium oxide (CaTiO 3). All PV perovskite materials have the general chemical formula ABX 3 , as illustrated in Figure 1a. Organic-Inorganic hybrid PSCs are typically made using an organic/ inorganic cation (A = methylammonium (MA) CH 3 NH 3 + , formamidinium (FA) CH 3 (NH 2) 2 + , or cesium), a divalent cation (B = Pb 2+ or Sn 2+) , [29] and an anion (X = Cl − , Br − , or I −), illustrated in Figure 1b. [16,30] A is surrounded by eight lead halide octahedra (B in the center of octahedra) and forms a cubic perovskite structure. When the size of A or/and X is changed, the structure of perovskite will distort. The Goldschmidt tolerance factor (t) [31] of perovskite is an empirical index for Organic-inorganic hybrid perovskite solar cells (PSCs) have attracted significant attention in recent years due to their high-power conversion efficiency, simple fabrication, and low material cost. However, due to their high sensitivity to moisture and oxygen, high efficiency PSCs are mainly constructed in an inert environment. This has led to significant concerns associated with the long-term stability and manufacturing costs, which are some of the major limitations for the commercialization of this cutting-edge tech...

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Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

Section: Solvent Engineering: One-step Spin-coatingmentioning

confidence: 99%

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Ambient Fabrication of Organic–Inorganic Hybrid Perovskite Solar Cells

et al. 2020

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“…[ 41 ] All air‐processed PSCs without any conditional control are of great significance. [ 42–50 ] However, it is often nontrivial to transplant technique innovations involved in inert atmosphere to the device fabrication in ambient air. Thus, there is still great room to push the performance of fully air‐processed PSCs.…”

Section: Introductionmentioning

confidence: 99%

Surfactant Sodium Dodecyl Benzene Sulfonate Improves the Efficiency and Stability of Air‐Processed Perovskite Solar Cells with Negligible Hysteresis

Zhang

Tang

et al. 2020

Solar RRL

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The device performance of organic–inorganic hybrid halide perovskite solar cells (PSCs) is highly dependent on the quality of perovskite layer. Herein, a multifunctional chemical additive strategy is reported to simultaneously improve the efficiency and stability of fully air‐processed PSCs. The planner methylammonium lead trihalide (MAPbI3)‐based PSCs incorporating sodium dodecyl benzene sulfonate (SDBS) exhibit a champion power conversion efficiency (PCE) of 19.20% and negligible hysteresis, which is one of the top efficiencies of MAPbI3‐based PSCs made in air. The increased efficiency is due to the reduction of defects and inhibition of ion migration in the perovskite films. Furthermore, the enhancement of device performance and stability can also be ascribed to highly preferred and efficient perovskite crystals protecting the perovskite films from humidity. The corresponding unencapsulated device retains 92.34% of its initial efficiency after 90 days (>2100 h) storage in air and maintains 85.20% of its original PCE after being exposed to 85 °C for 27 h. The results indicate that SDBS is a promising chemical additive to enhance the performance of air‐processed PSCs for future applications.

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“…28,29 So far, SnO 2 is normally used as the ETL in high-performance perovskite solar cells due to its excellent photoelectric properties. 30 Moreover, SnO 2 is found to be a good ETL of perovskite solar cells, owing to the more matched energy level between SnO 2 and perovskites. 31,32 Ke et al first used the SnO 2 ETL in conventional planar PSCs and achieved a PCE of 16.02% with no observable hysteresis.…”

Section: Introductionmentioning

confidence: 99%

High-efficiency perovskite solar cells with poly(vinylpyrrolidone)-doped SnO₂as an electron transport layer

Zhang

Chi

et al. 2020

Mater. Adv.

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Ethyl acetate green antisolvent process for high-performance planar low-temperature SnO2-based perovskite solar cells made in ambient air

Cited by 108 publications

References 69 publications

Ambient Fabrication of Organic–Inorganic Hybrid Perovskite Solar Cells

Ambient Fabrication of Organic–Inorganic Hybrid Perovskite Solar Cells

Surfactant Sodium Dodecyl Benzene Sulfonate Improves the Efficiency and Stability of Air‐Processed Perovskite Solar Cells with Negligible Hysteresis

High-efficiency perovskite solar cells with poly(vinylpyrrolidone)-doped SnO₂as an electron transport layer

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Ethyl acetate green antisolvent process for high-performance planar low-temperature SnO2-based perovskite solar cells made in ambient air

Cited by 108 publications

References 69 publications

Ambient Fabrication of Organic–Inorganic Hybrid Perovskite Solar Cells

Ambient Fabrication of Organic–Inorganic Hybrid Perovskite Solar Cells

Surfactant Sodium Dodecyl Benzene Sulfonate Improves the Efficiency and Stability of Air‐Processed Perovskite Solar Cells with Negligible Hysteresis

High-efficiency perovskite solar cells with poly(vinylpyrrolidone)-doped SnO2as an electron transport layer

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High-efficiency perovskite solar cells with poly(vinylpyrrolidone)-doped SnO₂as an electron transport layer