Improved interface of ZnO/CH3NH3PbI3 by a dynamic spin-coating process for efficient perovskite solar cells

Yang, Feng; Kang, Dong‐Won; Kim, Yong−Sang

doi:10.1039/c7ra01869j

Cited by 69 publications

(33 citation statements)

References 35 publications

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“…[22][23][24] These features could accelerate the transportation of photogenerated electrons, resulting in efficient and hysteresis-free PSC devices. However, ZnO-based PSCs suffer from the unwanted reaction between ZnO and perovskite layers, happening during the annealing of the perovskite at 100 C. [25][26][27][28][29][30] This issue needs to be addressed for the fabrication of efficient and stable PSCs. In the literature, several strategies have been employed to solve this problem for example, synthesis of a new nanocomposite based on ZnO, applying an interfacial layer as a barrier between ZnO and the perovskite layer, and passivation of the ZnO lm.…”

Section: Introductionmentioning

confidence: 99%

A graphene/ZnO electron transfer layer together with perovskite passivation enables highly efficient and stable perovskite solar cells

et al. 2019

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Section: Introductionmentioning

confidence: 99%

A graphene/ZnO electron transfer layer together with perovskite passivation enables highly efficient and stable perovskite solar cells

et al. 2019

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“…[33][34][35][36] For PSCs, ZnO layer has a potential to react with perovskite film during the annealing process, as was shown by many researchers. 37,38 Fig. 1 shows the topview scanning electron microscopy (SEM) images of perovskite films annealed on top of ZnO and ZSO ETLs.…”

mentioning

confidence: 99%

Zinc Stannate Nanorod as an Electron Transporting Layer for Highly Efficient and Hysteresis-less Perovskite Solar Cells

Tavakoli¹,

Prochowicz²,

Yadav³

et al. 2018

Eng. Sci.

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Careful engineering of the electron transfer layer (ETL) is a promising approach to improve the efficiency of perovskite solar cells (PSCs). In this study, we demonstrate the potential of using zinc stannate (Zn 2 SnO 4, or ZSO from here) as ETL for the fabrication of highly efficient PSCs. ZSO was deposited on top of FTO glass as thin films and nanorod arrays using ultrasonic spray pyrolysis (USP) technique. Optical characterizations reveal that perovskite films deposited on such nanorod arrays of ZSO have a lower transmittance exhibiting better charge extraction properties compared to the planar ZSO thin films. The best ZSO-based device reached a power conversion efficiency (PCE) of 18.24% and a high current density of 23.8 mA/cm 2. Moreover, these devices showed a lower hysteresis index in compared to the ZSO planar based devices.

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“…[ 39 ] Several solutions have been developed previously, including ion doping, [ 40 ] adding an interlayer, [ 41,42 ] removing the residuals ligands of the ZnO surface, [ 43 ] developing a ZnO/r‐GO core–shell structure quantum dot, [ 44 ] or using the dynamic spin‐coating strategy. [ 45 ] Chen and coworkers [ 42 ] used a 3‐aminopropanoc acid self‐assembled monolayer as a modifier of the sol–gel ZnO film, leading to the improvement of efficiency from 11.96% to 15.76%. Zheng and coworkers [ 46 ] added a thin layer of MgO and a submonolayer of protonated ethanolamine molecules on top of ZnO.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Improvement of the Long‐Term and Thermal Stability of the Perovskite Solar Cells Using 2,3,4,5,6‐Pentafluorobenzoyl Chloride (PFBC)‐Capped ZnO Nanoparticles Buffer Layer

et al. 2020

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Research progress of hybrid organicinorganic perovskite (PVSK) solar cells has achieved fast growth in a short period of time by academia. Due to interface engineering and optimizing fabrication techniques, power conversion efficiency (PCE) of single-junction PVSK solar cells ascended substantially from 3.8% to 25.2% in a very short period, showing a great potential candidate for future photovoltaics. [1,2] So, at this circumstance, stability is a key problem that decides future commercialization. [3-5] The degradation of PVSK solar cells is a complex physical-chemical process. The previous works reported that ion migration was a main factor that causes the intrinsic degradation of perovskite solar cells. [6-8] In perovskite solar cells, I À and methylammonium iodide (MAI) can be transferred from the perovskite layer into the interface layer and electrode through grain boundary [9] and weak points of the buffer layers. [10] Therefore, besides the compositions [11] and crystallization of the perovskite layer, [12,13] the interface contact [14-17] and the electrodes [18,19] also greatly influenced the lifetime of the devices. In the inverted p-in type perovskite solar cells, the electrontransporting layer (ETL) plays a critical role in collecting the charge, and it is also actually the structural encapsulation layer to protect perovskite layer from environmental stresses that can degrade the perovskite layer. The commonly used ETL in the p-in type perovskite solar cells is fullerene derivative, typically like PC 61 BM. However, the randomly oriented fullerene ETL was not robust enough to resist ion migration and ensure high stability. [20,21] The intensive reaction of PVSK and metal electrode still occurred as the PC 61 BM was deposited underneath the electrodes, especially in atmosphere air. [22,23] In the past few years, several attempts have been made to enhance the protection of the perovskite layer by applying different organic-inorganic groups as a replacement or modifier of PC 61 BM. [24-26] These extended buffer layers provide a push to stabilize solar cells in ambient conditions. Due to the advantages of electron mobility and fabrication ease, metal oxides are considered choices for the

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Improved interface of ZnO/CH₃NH₃PbI₃ by a dynamic spin-coating process for efficient perovskite solar cells

Abstract: We report a possible mechanism to cause poor performance and a novel dynamic spin-coating process for efficient perovskite solar cells.

Cited by 69 publications

References 35 publications

A graphene/ZnO electron transfer layer together with perovskite passivation enables highly efficient and stable perovskite solar cells

A graphene/ZnO electron transfer layer together with perovskite passivation enables highly efficient and stable perovskite solar cells

Zinc Stannate Nanorod as an Electron Transporting Layer for Highly Efficient and Hysteresis-less Perovskite Solar Cells

Simultaneous Improvement of the Long‐Term and Thermal Stability of the Perovskite Solar Cells Using 2,3,4,5,6‐Pentafluorobenzoyl Chloride (PFBC)‐Capped ZnO Nanoparticles Buffer Layer

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