Low-bandgap mixed tin–lead iodide perovskite absorbers with long carrier lifetimes for all-perovskite tandem solar cells

Zhao, Dewei; Yu, Yue; Wang, Changlei; Liao, Wei‐Qiang; Shrestha, Niraj; Grice, Corey R.; Cimaroli, Alexander J.; Guan, Lei; Ellingson, Randy J.; Zhu, Kai; Zhao, Xingzhong; Xiong, Ren‐Gen; Yan, Yanfa

doi:10.1038/nenergy.2017.18

Cited by 686 publications

(651 citation statements)

References 44 publications

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“…[198] More importantly, the infrared absorbing FA 0. [199] Based on their previous results on low-bandgap PSCs, [200] they achieved high-performance low-bandgap cells through optimizing the thickness of PVSK absorber layer. When combined with a ~18% efficiency FA 0.3 MA 0.7 PbI 3 top cell, the all-PVSK 4-terminal tandem cell displayed an ~21% PCE.…”

Section: F − or Pseudohalide/i Mixed Pvskmentioning

confidence: 99%

The Emergence of the Mixed Perovskites and Their Applications as Solar Cells

Xiao

Liü

Zhang

et al. 2017

Advanced Energy Materials

129

105

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The halide perovskite (PVSK) materials (with ABX3 formulation) have emerged as “dream materials” for photovoltaic (PV) applications due to their remarkable physical properties such as high optical absorption coefficient, carrier mobility, long carrier diffusion lengths, etc. These properties have enabled the PV devices to reach higher than 20% power conversion efficiencies (PCE) in record time. The further pursuit of higher PCE and improved stability brings forth increasing interests in so‐called “mixed composition” PVSK materials, consisting of partial substitution of the A, B, and/or X‐sites with alternative elements/molecules of similar size. Herein, we highlight the recent advances in developing mixed PVSK for PVs and their relevant optoelectronic properties. We mainly focus on mixed PVSK materials in the form of polycrystalline thin films, but also discuss nanostructured and two‐dimensional (2D) PVSK materials due to the increasing interest of broad readership. Efforts are exerted to elucidate the design principles of mixed PVSK and fabrication techniques for high performance optoelectronic devices, which help deepen our fundamental understanding of mixed PVSK systems. We hope this review will shed light onto the design and synthesis of mixed PVSK materials to further the progress of PVSK photovoltaics towards higher efficiencies and longer lifetimes.

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Section: F − or Pseudohalide/i Mixed Pvskmentioning

confidence: 99%

The Emergence of the Mixed Perovskites and Their Applications as Solar Cells

Xiao

Liü

Zhang

et al. 2017

Advanced Energy Materials

129

105

View full text Add to dashboard Cite

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“…[19] This device structure has obvious drawbacks such as the high-temperature processing of the TiO 2 scaffold and the potential damage or oxidation of the Sn perovskite due to the p-dopant (lithium and cobalt salts) used in the HEL. [25] Despite the encouraging progress, the PCE of the mixed tin and lead based single junction HPSC is still lower than the Pbbased solar cells. In this configuration they reported a PCE of 10.1% only when the tin content was as low as 15%.…”

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confidence: 99%

Enhancing the Performance of the Half Tin and Half Lead Perovskite Solar Cells by Suppression of the Bulk and Interfacial Charge Recombination

et al. 2018

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In this article it is investigated how the hole extraction layer (HEL) influence the charge recombination and performance in half tin and half lead (FASn Pb I ) based solar cells (HPSCs). FASn Pb I film grown on PEDOT:PSS displays a large number of pin-holes and open grain boundaries, resulting in a high defect density and shunts in the perovskite film causing significant bulk and interfacial charge recombination in the HPSCs. By contrast, FASn Pb I films grown on PCP-Na, an anionic conjugated polymer, show compact and pin-hole free morphology over a large area, which effectively eliminates the shunts and trap states. Moreover, PCP-Na is characterized by a higher work function, which determines a favorable energy alignment at the anode interface, enhancing the charge extraction. Consequently, both the interfacial and bulk charge recombination in devices using PCP-Na HEL are considerably reduced giving rise to an overall improvement of all the device parameters. The HPSCs fabricated with this HEL display power conversion efficiency up to 16.27%, which is 40% higher than the efficiency of the control devices using PEDOT:PSS HEL (11.60%). Furthermore, PCP-Na as HEL offers superior performance in larger area devices compared to PEDOT:PSS.

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“…Even more importantly, in the case of pure tin or mixed lead/tin perovskite solar cells, anti-solvent crystallization was the sole manner to fabricate films of high quality and excellent surface coverage (Figure 5b). Quite notably, the current record efficiencies (8.1% for pure tin [37] and a certified 17% for 60% tin perovskite [38]) are attained by this technique. We do not intend to comment further on the tin perovskite solar cells here, as we have already published a review paper on the topic [39].…”

Section: The Importance Of the Presence Of The Intermediate Phase: A mentioning

confidence: 82%

Anti-Solvent Crystallization Strategies for Highly Efficient Perovskite Solar Cells

et al. 2017

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Solution-processed organic-inorganic halide perovskites are currently established as the hottest area of interest in the world of photovoltaics, ensuring low manufacturing cost and high conversion efficiencies. Even though various fabrication/deposition approaches and device architectures have been tested, researchers quickly realized that the key for the excellent solar cell operation was the quality of the crystallization of the perovskite film, employed to assure efficient photogeneration of carriers, charge separation and transport of the separated carriers at the contacts. One of the most typical methods in chemistry to crystallize a material is anti-solvent precipitation. Indeed, this classical precipitation method worked really well for the growth of single crystals of perovskite. Fortunately, the method was also effective for the preparation of perovskite films by adopting an anti-solvent dripping technique during spin-coating the perovskite precursor solution on the substrate. With this, polycrystalline perovskite films with pure and stable crystal phases accompanied with excellent surface coverage were prepared, leading to highly reproducible efficiencies close to 22%. In this review, we discuss recent results on highly efficient solar cells, obtained by the anti-solvent dripping method, always in the presence of Lewis base adducts of lead(II) iodide. We present all the anti-solvents that can be used and what is the impact of them on device efficiencies. Finally, we analyze the critical challenges that currently limit the efficacy/reproducibility of this crystallization method and propose prospects for future directions.

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Low-bandgap mixed tin–lead iodide perovskite absorbers with long carrier lifetimes for all-perovskite tandem solar cells

Cited by 686 publications

References 44 publications

The Emergence of the Mixed Perovskites and Their Applications as Solar Cells

The Emergence of the Mixed Perovskites and Their Applications as Solar Cells

Enhancing the Performance of the Half Tin and Half Lead Perovskite Solar Cells by Suppression of the Bulk and Interfacial Charge Recombination

Anti-Solvent Crystallization Strategies for Highly Efficient Perovskite Solar Cells

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