Fully doctor-bladed planar heterojunction perovskite solar cells under ambient condition

Peng, Yiming; Cheng, Yudiao; Wang, Chunhua; Zhang, Chujun; Xia, Huayan; Huang, Keqing; Tong, Shuang; Xin, Hao; Yang, Junliang

doi:10.1016/j.orgel.2018.04.020

Cited by 71 publications

(40 citation statements)

References 33 publications

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“…We have previously observed that kind of substrate, comparing organic PEDOT and several inorganic oxides had an impact on the perovskite degradation process. [31][32][33][34] Here we show that not just the substrate type but the preparation and termination method has influence on long term PSC stability.…”

Section: Resultsmentioning

confidence: 99%

Spray-Pyrolyzed ZnO as Electron Selective Contact for Long-Term Stable Planar CH₃NH₃PbI₃ Perovskite Solar Cells

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Barea

Tena‐Zaera

et al. 2018

ACS Appl. Energy Mater.

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Electron selective contacts (ESCs) play an important role in the performance of perovskite solar cells (PSCs). ZnO has attracted an important attention as a good material for ESCs because of its matched energy levels with those of perovskite, its high transmittance in the visible region and its high electron mobility. Here we reported the use ZnO thin layers prepared by spray pyrolysis as ESC for PSCs. Our ZnO based planar CH3NH3PbI3 (MAPbI3) devices were not only stable in a humidity of 35% but also improved the performance even after more than 1 month of preparation, due to an increase of charge transfer at the ZnO interface as it has been characterized by Impedance Spectroscopy. The formation of ZnO depending on the preparation conditions such as gas flow, zinc acetate solution concentrations and substrate temperatures effect on the performance of stability of MAPbI3 solar cells, and also the low-hysteresis reported for these samples were discussed in this study. We have also observed that long term structural evolution of perovskite film also depends on the ZnO substrate and its deposition method.

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Section: Resultsmentioning

confidence: 99%

Spray-Pyrolyzed ZnO as Electron Selective Contact for Long-Term Stable Planar CH₃NH₃PbI₃ Perovskite Solar Cells

Ngo

Barea

Tena‐Zaera

et al. 2018

ACS Appl. Energy Mater.

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“…10, we know that the device's total current (J total ) is a function of the light intensity (I) and applied voltage (V). It includes the two parts of dark state current (J dark ) and photo-induced current (J ph ), namely: 21,22…”

Section: Additive's Effect On the Charge Recombination Processmentioning

confidence: 99%

Study of the effect of DIO additive on charge extraction and recombination in organic–inorganic hybrid MAPbI_3−xCl_x perovskite solar cell

2018

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“…[7][8][9][10][11][12] As a result of intensive research, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has rapidly risen from the original 3.8% to current 25.2% over the past ten years. [13][14][15][16][17][18] Although the PCE of PSCs is comparable to other commercial solar cells, another important technical bottleneck exists, i.e., the stability of perovskite severely hinders the large-scale commercialization of PSCs. This is because 1) organic-inorganic hybrid perovskites are extremely sensitive to humidity and rapidly decompose under humid conditions; [19][20][21] 2) tin-based (Sn-) perovskites are easily oxidized in the air or in the glovebox at ultra-low oxygen concentrations, which makes their performance and stability less ideal compared to lead-based; [22] 3) ion-migration-induced significantly, which are inseparable from their different crystal structures and the special natural QW structure in 2D perovskite.…”

Section: Introductionmentioning

confidence: 99%

Crystallization Kinetics in 2D Perovskite Solar Cells

Wang

Lei

et al. 2020

Advanced Energy Materials

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volatile decomposition [23] or halide segregation are often observed in hybrid perovskites under various stress conditions (light, [24] thermal, [25] and electric fields [26]); 4) spontaneous phase transition easily occurs for perovskite with unstable crystal structures, particularly for inorganic perovskite. [27-29] To improve the stability of PSCs, researchers attempted numerous methods such as encapsulation, [30] additive engineering, [31] component engineering, [32] etc. [33] However, the PSCs' stability is yet to achieve a perfect solution. Recently, researchers found that the introduction of long-chain organic cations in 3D perovskite as 2D perovskite can block water and oxygen molecules, meanwhile, generate a steric effect to prevent phase transitions, and limit ion migration. [34-36] Hence, fabricating 2D [37,38] or 2D/3D [39-43] mixed perovskite as absorbing layers are effective approaches to improve the stability of PSCs. However, the PCE of 2D PSCs remain lower than that of the 3D ones, which is mainly attributed to the introduction of organic macromolecules that blocks the effective extraction and transport of carriers. [44,45] Fortunately, 2D perovskite usually has three arrangements, namely parallel, perpendicular to the glass substrate or randomly arranged. [46] Manipulating the orientation of the crystal and the phase distribution in the 2D solution-processed perovskite can improve the efficiency and reproducibility of the device. Among them, the most desired arrangement for PSCs is the one that perpendicular to the substrate. Therefore, studying the crystallization kinetics of 2D perovskite is curial to effectively control the film forming process and adjust the crystal orientation (perpendicular to the substrate), which can effectively avoid or reduce the adverse effects of the organic molecular layer and improve device efficiency. [47,48] Nevertheless, few review articles were published on this subject. In this review, we mainly focus on the key issue for controlling crystallization kinetics and summarizing the research progress of their effects on various types of 2D PSCs. We also discuss the crystal/natural quantum well (QW) structure and the original stability for 2D PSCs in detail. Finally, remaining challenges and outlooks are presented. 2. Crystal and Natural Quantum Well Structure The material structure has a substantial impact on performance. [49-51] Properties of 2D and 3D perovskites differ 2D perovskites demonstrate higher moisture stability, oxygen content, thermal stability, and a significantly lower ion migration/phase transition occurrence in comparison to 3D perovskite. These advantages imply huge potential for 2D perovskite in commercial applications in the photovoltaic field. However, the horizontal arrangement of the organic layer severely hinders the transport of carriers, and thus, the power conversion efficiency of 2D perovskite solar cells (PSCs) is significantly lower than that of 3D. Controlling the crystallization orientation to achieve rapid carrier transport can effe...

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Fully doctor-bladed planar heterojunction perovskite solar cells under ambient condition

Cited by 71 publications

References 33 publications

Spray-Pyrolyzed ZnO as Electron Selective Contact for Long-Term Stable Planar CH₃NH₃PbI₃ Perovskite Solar Cells

Spray-Pyrolyzed ZnO as Electron Selective Contact for Long-Term Stable Planar CH₃NH₃PbI₃ Perovskite Solar Cells

Study of the effect of DIO additive on charge extraction and recombination in organic–inorganic hybrid MAPbI_3−xCl_x perovskite solar cell

Crystallization Kinetics in 2D Perovskite Solar Cells

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Fully doctor-bladed planar heterojunction perovskite solar cells under ambient condition

Cited by 71 publications

References 33 publications

Spray-Pyrolyzed ZnO as Electron Selective Contact for Long-Term Stable Planar CH3NH3PbI3 Perovskite Solar Cells

Spray-Pyrolyzed ZnO as Electron Selective Contact for Long-Term Stable Planar CH3NH3PbI3 Perovskite Solar Cells

Study of the effect of DIO additive on charge extraction and recombination in organic–inorganic hybrid MAPbI3−xClx perovskite solar cell

Crystallization Kinetics in 2D Perovskite Solar Cells

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Spray-Pyrolyzed ZnO as Electron Selective Contact for Long-Term Stable Planar CH₃NH₃PbI₃ Perovskite Solar Cells

Spray-Pyrolyzed ZnO as Electron Selective Contact for Long-Term Stable Planar CH₃NH₃PbI₃ Perovskite Solar Cells

Study of the effect of DIO additive on charge extraction and recombination in organic–inorganic hybrid MAPbI_3−xCl_x perovskite solar cell