Enhancing Perovskite Solar Cell Performance through Femtosecond Laser Polishing

Kong, Weijie; Zhao, Chen; Xing, Jun; Zou, Yuting; Huang, Tao; Li, Feng; Yang, Jianjun; Yu, Weili; Chen, Guo

doi:10.1002/solr.202000189

Cited by 29 publications

(28 citation statements)

References 46 publications

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“…[38] This may be ascribed to the enhanced interaction between the perovskite and CAC due to the rich oxygen content. [6,39] The TRPL results for perovskite deposited in the half devices (p-MPSCs with mesoscopic ZrO 2 and mesoscopic CE layers on [37,40] The fitted parameters are summarized in Table S3, Supporting Information. The perovskite deposited on insulating glass exhibits a lifetime of 80.65 ns, and the lifetimes are decreased to 27.51, 24.44, 22.16, 21.43, and 17.41 ns for perovskite deposited on 0CAC-E, 0.5CAC-E, 0.75CAC-E, 1.0CAC-E, and 2.0CAC-E, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…[5] However, the efficiency of C-PSCs has not exceeded 20%. [6] Therefore, developing carbon materials for C-PSCs to promote their efficiency toward the comparable level as conventional PSCs is in great demand. [4] Since no additional HTM is applied in C-PSCs, adjusting the work function (WF) of CEs to realize more efficient hole extraction and more suitable energy level alignment is an effective strategy to enhance the efficiency of C-PSCs.…”

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confidence: 99%

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Cellulose‐Based Oxygen‐Rich Activated Carbon for Printable Mesoscopic Perovskite Solar Cells

et al. 2021

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Halide perovskite solar cells (PSCs) have drawn worldwide attention due to their great potential to be promising candidates for highly efficient and cost-effective photovoltaic technologies. [1] Benefiting from the excellent optoelectronic properties of halide perovskites together with previous abundant experience in other solar cells, especially in dye-sensitized solar cells and organic solar cells, the power conversion efficiency (PCE) of conventional PSCs has been boosted to 25.5%, [2] making PSCs one of the most efficient solar cell type. Conventional efficient PSCs in lab usually rely on costly materials such as gold or silver electrode and organic hole transport materials (HTM). [3] To further reduce the material and fabrication cost of PSCs toward commercialization, carbon electrode-based HTM-free perovskite solar cells (C-PSCs) are developed. [4] In C-PSCs, carbon electrodes (CEs) are chosen to replace metal electrodes due to their excellent adjustable electronic properties, chemical stability and low cost. [5] However, the efficiency of C-PSCs has not exceeded 20%. [6] Therefore, developing carbon materials for C-PSCs to promote their efficiency toward the comparable level as conventional PSCs is in great demand. [4] Since no additional HTM is applied in C-PSCs, adjusting the work function (WF) of CEs to realize more efficient hole extraction and more suitable energy level alignment is an effective strategy to enhance the efficiency of C-PSCs. [7,8] To realize this, Jiang et al. introduced p-type metal oxides into the CE to improve its WF for extracting holes. [9] However, the introduction of those metal oxides led to the sheet resistance increase of CEs, which resulted in series resistance increase of the C-PSCs and restricted the efficiency improvement. Doping graphite has been demonstrated as another effective method to adjust the CEs WF for improving C-PSCs performance. Duan et al. improved the efficiency of C-PSCs from 12.4% to 13.6% by applying boron-doped carbon as the electrode. [5] Yang's group improved the WF of CE and the efficiency of C-PSCs by doping graphite with boron. [10] In addition, it is found that introducing oxygen-containing functional groups into the CE can also increase the WF. Tian et al. synthesized a carbon black with much higher oxygen content and a much higher WF than common carbon black. [11] When applying it in the CE for C-PSCs, the device efficiency was enhanced from 13.6% to 15.7%. This work demonstrated that introducing oxygen into CEs is of great potential to improve C-PSCs efficiency. However, the restriction is that the related process for introducing oxygen is carried out at high temperature of about 1600 K. Therefore, developing facile methods to synthesize oxygen-rich carbon materials sustainably for CEs is worth exploring.Biomass materials, which hold the "Sustainable and green" characteristics, have been applied for different energy conversion devices. [12][13][14] Zhu et al. synthesized a ZrO 2 @cellulose acetatereinforced nanofibrous membrane for sodium-ion b...

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Cellulose‐Based Oxygen‐Rich Activated Carbon for Printable Mesoscopic Perovskite Solar Cells

et al. 2021

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“…Kong et al. [ 78 ] developed a method to polish the perovskite film surface by ablation of the top 20 nm of the film using a femtosecond laser post crystallization treatment. A subsequent thermal recrystallization yield films of larger grain size (lower grain boundary density).…”

Section: Part Ii: Other Laser Methods For Pscsmentioning

confidence: 99%

Laser Processing Methods for Perovskite Solar Cells and Modules

Brooks

Nazeeruddin

2021

Advanced Energy Materials

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The perovskite photovoltaic technology is now transitioning from basic research to the pre‐industrialization phase. In order to achieve reliable and high‐performance commercial perovskite solar modules, high throughput manufacturing technologies must now be adapted to the specific constraints and requirements imposed by the perovskite solar cells unique new chemistries, film deposition methodologies, and encapsulation requirements. Laser technologies will play an important role in the industrialization of these devices, both to achieve high active surface area modules and for the deposition and/or treatment of the critical layers. Industrial lasers will be essential to achieve active areas greater than 95% of the total area to retain the benefits of the very high performances reported for <1 cm2 laboratory cells. The speed of laser processing for the preparation of interconnects is unrivalled by comparison to other structuring methods. Recent reports of the use of lasers in upscaling perovskite solar cells are presented and analyzed here.

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“…solid-phase recrystallization or polishing processes has been demonstrated to enhance the stability and efficiency of PSCs. 7,8 However, these strategies are appropriate for small-area PSCs but are not compatible with the scalable, high-speed manufacturing of large-area perovskite photovoltaic modules, particularly those made by roll-to-roll processes and have strict requirements for substrate flatness and perovskite material thickness. Therefore, it is important to develop an effective stabilization method that is compatible with the high-throughput manufacturing of perovskite modules without significantly increasing production cost, as low-cost and high-throughput processability is one major advantage of perovskite photovoltaics in competing with conventional counterparts.…”

Section: Context and Scalementioning

confidence: 99%