In situ transfer of CH3NH3PbI3 single crystals in mesoporous scaffolds for efficient perovskite solar cells

Guan, Yanjun; Xu, Mi; Zhang, Wenhao; Li, Da; Hou, Xiaomeng; Li, Hong; Wang, Qifei; Zhang, Zhihui; Mei, Anyi; Chen, Min; Zhou, Yuanyuan; Padture, Nitin P.; Hu, Yue; Rong, Yaoguang; Han, Hongwei

doi:10.1039/c9sc04900b

Cited by 25 publications

(30 citation statements)

References 38 publications

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“…Photodiodes comprising metal halide perovskites have demonstrated extraordinary potential for practical applications. [ 1–4 ] The last few years have witnessed an explosive growth of interest in perovskite solar cells [ 5–7 ] and light‐emitting diodes [ 8–10 ] because of their outstanding device performance and ease of fabrication. Recently, perovskites have also shown their superiority in light signal detection (photodetectors), [ 11,12 ] comparable to those of commercially available crystalline Si photodetectors.…”

Section: Introductionmentioning

confidence: 99%

Low‐Dimensional Contact Layers for Enhanced Perovskite Photodiodes

Luo

Zou

Yang

et al. 2020

Adv Funct Materials

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Controlling defects and energy‐band alignments are of paramount importance to the development of high‐performance perovskite‐based photodiodes. Yet, concurrent improvements in interfacial contacts and defect reduction simply by tailoring bottom contacts have not been investigated. An effective strategy is reported that can simultaneously improve energy‐band alignments and structural defects by introducing low‐dimensional contact (LDC) layers at the bottom interface. It is found that LDC‐based perovskites considerably suppress undesirable structural defects induced by microstrains, resulting in reduced nonradiative recombination centers and improved carrier lifetimes. Additionally, the resulting LDC‐based interface structures help block minority carrier injection from the electrodes by forming built‐in electric fields. As a consequence, LDC‐based perovskite photodiodes showed improved light detection capabilities. The result opens an avenue to yield highly efficient photodiodes.

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Section: Introductionmentioning

confidence: 99%

Low‐Dimensional Contact Layers for Enhanced Perovskite Photodiodes

Luo

Zou

Yang

et al. 2020

Adv Funct Materials

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“…In six years, the certified power conversion efficiency (PCE) increased from 14.1% to 25.2%, which has exceeded the multicrystalline silicon solar cells, copper indium gallium selenide (CIGS) solar cells, and cadmium telluride (CdTe) solar cells in the lab‐scale . The high PCE of PSCs relies on the outstanding optics and electric properties of perovskite material itself . Besides the high PCE, another advantage of PSCs is that the state‐of‐the‐art devices could be fabricated by a low‐temperature solution‐processed method with low cost, which makes PSCs the promising candidate for commercialization .…”

mentioning

confidence: 99%

Crystallization Control of Ternary‐Cation Perovskite Absorber in Triple‐Mesoscopic Layer for Efficient Solar Cells

Wang

Zhang

et al. 2019

Advanced Energy Materials

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Controlling the crystallization of organic–inorganic hybrid perovskite is of vital importance to achieve high performing perovskite solar cells. The growth mechanism of perovskites has been intensively studied in devices with planar structures and traditional structures. However, for the printable mesoscopic perovskite solar cells, it is difficult to study the crystallization mechanism of perovskite owing to the complicated mesoporous structure. Here, a solvent evaporation controlled crystallization method to achieve ideal crystallization in the mesoscopic structure is provided. Combining results of scanning electron microscope and X‐ray diffraction, it is found that adjusting the evaporation rate of solvent can control the crystallization rate of perovskite and a model for the crystallization process during annealing in mesoporous structures is proposed. Finally, a homogeneous pore filling in the mesoscopic structure without any additives is successfully achieved and a stabilized power conversion efficiency of 16.26% using ternary‐cation perovskite absorber is realized. The findings will provide better understanding of perovskite crystallization in printable mesoscopic perovskite solar cells and pave the way for the commercialization of perovskite solar cells.

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“…The other type is the printable mesoscopic structure (TCO/ETL/ZrO 2 insulated layer/carbon: perovskite) ( Table 3 ). [ 104–116 ] This structure was first reported by Han's group. The last one is the inverted structure without HTL (TCO/perovskite/ETL/counter electrode) ( Table 4 ).…”

Section: Htl‐free Pscsmentioning

confidence: 91%

“…HTL-free devices with mesoscopic configuration are mainly devised and developed by Han's group for their fully printable technology. [104][105][106][107][108][109][114][115][116] These devices had a structure of FTO/ c-TiO 2 /m-TiO 2 /ZrO 2 /carbon(perovskite) (Figure 10a), where mesoscopic triple m-TiO 2 /ZrO 2 /carbon layers acted as the scaffold to support the perovskite active absorber. Perovskite was permeated into the scaffold by drop casting the precursor solution.…”

Section: Printable Mesoscopic Pscs Without An Htlmentioning

confidence: 99%

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Towards Simplifying the Device Structure of High‐Performance Perovskite Solar Cells

Huang

Liu²,

Liang³

et al. 2020

Adv Funct Materials

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Perovskite solar cells (PSCs) are considered one of the most promising nextgeneration examples of high-tech photovoltaic energy converters, as they possess an unprecedented power conversion efficiency with low cost. A typical high-performance PSC generally contains a perovskite active layer sandwiched between an electron-transport layer (ETL) and a hole-transport layer (HTL). The ETL and HTL contribute to the charge extraction in the PSC. However, these additional two layers complicate the manufacturing process and raise the cost. To extend this technology for commercialization, it is highly desired that the structure of PSCs is further simplified without sacrificing their photovoltaic performances. Thus, ETL-free or/and HTL-free PSCs are developed and attract more and more interest. Herein, the commonly used methods in reducing the defect density and optimizing the energy levels in conventional PSCs in order to simplify their structures are summarized. Then, the development of diverse ETL-free or/and HTL-free PSCs is discussed, with the PSCs classified, including their working principles, implemented technologies, remaining challenges, and future perspectives. The aim is to redirect the way toward low-cost and high-performance PSCs with the simplest possible architecture.

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In situ transfer of CH₃NH₃PbI₃ single crystals in mesoporous scaffolds for efficient perovskite solar cells

Abstract: An in situ crystal transfer method is developed for depositing the perovskite absorber in a triple-mesoscopic scaffold, and fabricating printable perovskite solar cells with enhanced performance.

Cited by 25 publications

References 38 publications

Low‐Dimensional Contact Layers for Enhanced Perovskite Photodiodes

Low‐Dimensional Contact Layers for Enhanced Perovskite Photodiodes

Crystallization Control of Ternary‐Cation Perovskite Absorber in Triple‐Mesoscopic Layer for Efficient Solar Cells

Towards Simplifying the Device Structure of High‐Performance Perovskite Solar Cells

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