Lead‐Free Solar Cells based on Tin Halide Perovskite Films with High Coverage and Improved Aggregation

Liu, Jiewei; Ozaki, Masaharu; Yakumaru, Shinya; Handa, Taketo; Nishikubo, Ryosuke; Kanemitsu, Yoshihiko; Saeki, Akinori; Murata, Yasujiro; Murdey, Richard; Wakamiya, Atsushi

doi:10.1002/anie.201808385

Cited by 128 publications

(137 citation statements)

References 42 publications

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“…However, it can yield perovskite particles which are >200 nm in size and exhibited full surface coverage due to the homogenous vapor deposition of SnI 2 . A complete surface coverage is important to reduce contact leakage between charge transport layers . The effectiveness of LT‐VASP has been revealed by X‐ray photoelectron spectroscopic (XPS) and X‐ray diffraction (XRD) analyses as seen in the thin films of MASnI 3 exhibiting a tetragonal α‐structure, no observable contaminations from precursors or degradation products, Sn in the +2 state, and a complete absorption of SnI 2 into the perovskite phase.…”

Section: Preparation Methods Of Sn Halide Perovskite Filmsmentioning

confidence: 99%

“…Although the Pb halide perovskites still hold the supreme position regarding materials and device characteristics and performance, Sn halide perovskites have also benefited in numerous ways from the partial or complete substitution of Pb with Sn. Sn halide perovskites are adaptable to various preparation techniques which may include solution and vapor deposition methods . These techniques usually follow a low temperature processing pathway.…”

Section: Merits and Challenges Of Sn Halide Perovskitesmentioning

confidence: 99%

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Tin Halide Perovskites: Progress and Challenges

Yang

Igbari

Lou

et al. 2019

Advanced Energy Materials

161

121

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The chemical composition engineering of lead halide perovskites via a partial or complete replacement of toxic Pb with tin has been widely reported as a feasible process due to the suitable ionic radius of Sn and its possibility of existing in the +2 state. Interestingly, a complete replacement narrows the bandgap while a partial replacement gives an anomalous phenomenon involving a further narrowing of bandgap relative to the pure Pb and Sn halide perovskite compounds. Unfortunately, the merits of this anomalous behavior have not been properly harnessed. Although promising progress has been made to advance the properties and performance of Sn‐based perovskite systems, their photovoltaic (PV) parameters are still significantly inferior to those of the Pb‐based analogs. This review summarizes the current progress and challenges in the preparation, morphological and photophysical properties of Sn‐based halide perovskites, and how these affect their PV performance. Although it can be argued that the Pb halide perovskite systems may remain the most sought after technology in the field of thin film perovskite PV, prospective research directions are suggested to advance the properties of Sn halide perovskite materials for improved device performance.

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Section: Preparation Methods Of Sn Halide Perovskite Filmsmentioning

confidence: 99%

Section: Merits and Challenges Of Sn Halide Perovskitesmentioning

confidence: 99%

Tin Halide Perovskites: Progress and Challenges

Yang

Igbari

Lou

et al. 2019

Advanced Energy Materials

161

121

View full text Add to dashboard Cite

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“…Also, the average crystallite size increases due to annealing under a low partial pressure of dimethyl sulfoxide vapor. The topographical and electrical qualities of the perovskite film are enhanced facilitating the fabrication of tin‐based perovskite solar cell with a SPCE of over 7% . The effect of additives on the stability of lead‐free CsSnI 3 perovskite films has been studied by using first principle based calculations.…”

Section: Recent Research On Lead‐free Perovskitesmentioning

confidence: 99%

Potential Substitutes for Replacement of Lead in Perovskite Solar Cells: A Review

Kour¹,

et al. 2019

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Lead halide perovskites have displayed the highest solar power conversion efficiencies of 23% but the toxicity issues of these materials need to be addressed. Lead‐free perovskites have emerged as viable candidates for potential use as light harvesters to ensure clean and green photovoltaic technology. The substitution of lead by Sn, Ge, Bi, Sb, Cu and other potential candidates have reported efficiencies of up to 9%, but there is still a dire need to enhance their efficiencies and stability within the air. A comprehensive review is given on potential substitutes for lead‐free perovskites and their characteristic features like energy bandgaps and optical absorption as well as photovoltaic parameters like open‐circuit voltage (VOC), fill factor, short‐circuit current density (J SC), and the device architecture for their efficient use. Lead‐free perovskites do possess a suitable bandgap but have low efficiency. The use of additives has a significant effect on their efficiency and stability. The incorporation of cations like diethylammonium, phenylethyl ammonium, phenylethyl ammonium iodide, etc., or mixed cations at different compositions at the A‐site is reported with engineered bandgaps having significant efficiency and stability. Recent work on the advancement of lead‐free perovskites is also reviewed.

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“…Another major challenge for fabricating high PCE tin PSCs is the difficulty in preparing high‐quality perovskite films with full coverage of device substrate . In this regard, we found that THDH could remarkably improve the quality of the FASnI 3 films.…”

Section: Photovoltaic Parameters Of Fasni3 Perovskite Solar Cells Witmentioning

confidence: 78%

“…As Sn 4+ is known as the primary source for background carrier density, the higher V oc obtained in the devices with THDH additive can be ascribed to reduced recombination loss from the lower background carrier density in the Sn‐based perovskite films. In addition, hydrazinium iodide (N 2 H 5 I) remained in the resulting FASnI 3 films would act as a stabilizer against oxidation …”

Section: Photovoltaic Parameters Of Fasni3 Perovskite Solar Cells Witmentioning

confidence: 99%

Trihydrazine Dihydriodide‐Assisted Fabrication of Efficient Formamidinium Tin Iodide Perovskite Solar Cells

Fan

Zhang

et al. 2019

Solar RRL

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The deposition of a uniform and dense tin‐based perovskite layer with low defect‐caused background carrier density is crucial for achieving efficient tin perovskite solar cells (PSCs). These defects are mainly caused by the rapid oxidation of Sn2+ to Sn4+ in tin perovskite during device fabrication. Herein, trihydrazine dihydriodide ((N2H4)3(HI)2) is used as an additive for solution deposition of a formamidinium tin iodide (FASnI3) perovskite layer. The resultant FASnI3 layer is homogeneous with full surface coverage; moreover, the content of Sn4+ is significantly reduced in the film from the SnI2 precursor owing to the reductive property of (N2H4)3(HI)2. With the high‐quality FASnI3 layer as a light absorber, planar‐heterojunction perovskite solar cells are fabricated, exhibiting a maximum power conversion efficiency of 8.48% and good reproducibility. This work opens new possibilities for achieving efficient lead‐free tin‐based perovskite solar cells.

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Lead‐Free Solar Cells based on Tin Halide Perovskite Films with High Coverage and Improved Aggregation

Cited by 128 publications

References 42 publications

Tin Halide Perovskites: Progress and Challenges

Tin Halide Perovskites: Progress and Challenges

Potential Substitutes for Replacement of Lead in Perovskite Solar Cells: A Review

Trihydrazine Dihydriodide‐Assisted Fabrication of Efficient Formamidinium Tin Iodide Perovskite Solar Cells

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