Highly oriented MAPbI3 crystals for efficient hole-conductor-free printable mesoscopic perovskite solar cells

Liu, Shuang; Zhang, Deyi; Sheng, Yusong; Zhang, Weihua; Qin, Zhaotong; Qin, Minchao; Sheng, Li; Wang, Yifan; Gao, Chenxu; Wang, Qifei; Yue, Ming; Liu, Chao; Yang, Kai; Huang, Qi; Qi, Jianhang; Gao, Qiaojiao; Chen, Kai; Hu, Yue; Rong, Yaoguang; Lu, Xinhui; Mei, Anyi; Han, Hongwei

doi:10.1016/j.fmre.2021.09.008

Cited by 62 publications

(56 citation statements)

References 72 publications

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“…[123] Recently, Liu et al modulated the crystal growth of MAPbI 3 in a printed TiO 2 /ZrO 2 /carbon triple mesoscopic scaffold by controlling precursor and crystallization processes. [124] By balancing crystal growth and solvent evaporation rate at a low drying temperature, highly oriented MAPbI 3 with enhanced crystallinity in the mesoscopic scaffold was obtained. As a result, the PCE of hole-conductor-free printable PSCs based on the triple mesoscopic scaffold improved to 18.82%.…”

Section: Carbon Electrodesmentioning

confidence: 99%

Rear Electrode Materials for Perovskite Solar Cells

Chen

Zhang

Guan

et al. 2022

Adv Funct Materials

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Perovskite solar cells (PSCs) represent a promising next‐generation photovoltaic technology considering their high efficiency and low cost. At the current stage, resolving the stability bottleneck is extremely urgent to realize PSCs’ commercialization since the efficiencies of these cells are improved to a level comparable to that of crystalline silicon solar cells. Similar to other functional layers, a proper choice of the rear electrode atop the perovskite layer is equally important for achieving the device's long‐term stability. This topic has not been comprehensively reviewed before. Here, recent progress in the development of rear electrodes based on metals, carbon‐based materials, transparent conductive oxides, and conductive polymers is summarized, especially focusing on their different impacts on the device's long‐term stability and associated degradation mechanisms. In the context of practical applications, the impacts of rear electrode materials on the device's overall efficiency and cost‐effectiveness are also discussed.

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Section: Carbon Electrodesmentioning

confidence: 99%

Rear Electrode Materials for Perovskite Solar Cells

Chen

Zhang

Guan

et al. 2022

Adv Funct Materials

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“…[7,8] Conventional PSCs are usually assembled with the n-i-p device structure of electron transporting layer (ETL)/ the perovskite in the scaffold, which is much longer than that for annealing a perovskite thin film. [33] Hou et al first introduced a solvent vapor assisted crystallization approach to tune the phase transition and crystallization of FAPbI 3 in the scaffold, [34] which is similar to the widely-used solvent annealing process. [32,35] Then, Wang et al reported a solvent evaporationcontrolled crystallization method.…”

Section: Introductionmentioning

confidence: 99%

“…[36] Liu et al applied N-methylformamide as the solvent, and conducted a ultra-long annealing process of over 20 h for crystallizing the perovskite in the scaffold. [33] For obtaining high and reproducible device performance, we found that the annealing environment plays an essential role, which was mainly determined by assembling hand-made glass chambers with different dimensions (Figure S1, Supporting Information). However, the principles for designing the chambers and the corresponding solvent vapor distribution are still unknown.…”

Section: Introductionmentioning

confidence: 99%

“…The annealing process may take several hours for crystalizing the perovskite in the scaffold, which is much longer than that for annealing a perovskite thin film. [ 33 ] Hou et al. first introduced a solvent vapor assisted crystallization approach to tune the phase transition and crystallization of FAPbI 3 in the scaffold, [ 34 ] which is similar to the widely‐used solvent annealing process.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Balancing the Solvent Evaporation of Thermal Annealing Process for Metal Halide Perovskites and Solar Cells

et al. 2022

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Triple‐mesoscopic perovskite solar cells (PSCs) have attracted intensive attention due to the high stability, simple fabrication process, and low material cost. In this structure, the perovskite layer is hosted by a triple‐mesoscopic scaffold of TiO2/ZrO2/carbon, and thus the crystal quality is sensitive to the thermal annealing process. Typically, the annealing process is conducted in a petri dish, for which the solvent evaporation of the perovskite precursor is slowed down, but not controllable and designable. To control the solvent evaporation, annealing chambers are first designed with different shape and vapor releasing channels. Then, physical simulations are performed by a finite element method, and it is found out that the chamber with a crowned top and releasing channels on the bottom sides can realize homogeneous distribution of the solvent vapor. To verify the simulation results, chambers are fabricated by 3D printing technique, for which the printing deviation can be as low as 100 µm. By balancing the solvent evaporation and release, the optimal solvent evaporation is achieved of the perovskite precursor in the triple‐mesoscopic scaffold. This work offers a method to obtain homogeneous distribution of solvent vapor, and provides a new insight into understanding the influence of solvent evaporation during the thermal annealing process for PSCs.

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“…Very recently, Liu et al reported a novel solvent, N-methylformamide (NMF), for the growth of highly oriented perovskite crystals in mesoscopic layers. [9] Lead (II) iodide (PbI 2 ) and methylamine iodine (MAI) dissolved more balanced in NMF to obtain precursors with few large colloids. Combining with the controlled removal of solvent, quasi-single crystals were realized via inhibited nucleation and promoted growth.…”

mentioning

confidence: 99%

Halogen Bond Involved Post‐Treatment for Improved Performance of Printable Hole‐Conductor‐Free Mesoscopic Perovskite Solar Cells

Zhang

Jiang

et al. 2021

Solar RRL

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Perovskite solar cells (PSCs) are considered to be the most promising next‐generation photovoltaic technology. Among all the configurations of PSCs, the printable hole‐conductor‐free mesoscopic PSC (p‐MPSC) has unique advantages on low cost, large‐area fabrication and fabulous stability, which endows it with the greatest potential for industrialization. The interfacial recombination losses, especially at the perovskite/carbon interface, are the bottleneck for further improving the power conversion efficiency (PCE) of p‐MPSCs. 2‐Bromo‐6‐fluoronaphthalene is introduced as an interfacial modulator for p‐MPSCs through post‐treatment. The bromo‐terminal acts as an electrophilic site to interact with the iodine ion in perovskite via the noncovalent halogen bond. Meanwhile, the fused ring of naphthalene is capable to accommodate electron density that is attracted from the perovskite. This interaction induces a more favorable band structure at the interface. The hole extraction is promoted and the interfacial nonradiative recombination is inhibited. Accordingly, a champion p‐MPSC with an improved PCE of 16.77% from 15.50% of the pristine device is obtained.

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Highly oriented MAPbI3 crystals for efficient hole-conductor-free printable mesoscopic perovskite solar cells

Cited by 62 publications

References 72 publications

Rear Electrode Materials for Perovskite Solar Cells

Rear Electrode Materials for Perovskite Solar Cells

Modeling and Balancing the Solvent Evaporation of Thermal Annealing Process for Metal Halide Perovskites and Solar Cells

Halogen Bond Involved Post‐Treatment for Improved Performance of Printable Hole‐Conductor‐Free Mesoscopic Perovskite Solar Cells

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