Lead-free, stable, and effective double FA4GeIISbIIICl12 perovskite for photovoltaic applications

Dai, Wubin; Xu, Shuo; Zhou, Jun; Hu, Jin; Huang, Ke; Xu, Man

doi:10.1016/j.solmat.2018.12.031

Cited by 37 publications

(36 citation statements)

References 43 publications

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“…[ 95,96 ] It is the general chemical formula of A 4 B 2+ B 3+ 2 X 12 , where B 2+ could be Sn 2+ , Ge 2+ and Cu 2+ , B 3+ could be Sb 3+ , In 3+ and Bi 3+ . [ 97 ] The layered HDPs are a unique hybrid metal <111>‐oriented layered perovskites, which contain a B 2+ X 6 octahedra inserted between two layers of B 3+ X 6 octahedrons. In other words, the vacancies generated by B 2+ site cations, resulting in a collapse of the 3D‐network into a 2D network (see Figure 1d).…”

Section: Crystal and Electronic Structure Of Halide Double Perovskitesmentioning

confidence: 99%

Lead‐Free Halide Double Perovskite Nanocrystals for Light‐Emitting Applications: Strategies for Boosting Efficiency and Stability

et al. 2021

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Lead‐free halide double perovskite (HDP) nanocrystals are considered as one of the most promising alternatives to the lead halide perovskite nanocrystals due to their unique characteristics of nontoxicity, robust intrinsic thermodynamic stability, rich and tunable optoelectronic properties. Although lead‐free HDP variants with highly efficient emission are synthesized and characterized, the photoluminescent (PL) properties of colloidal HDP nanocrystals still have enormous challenges for application in light‐emitting diode (LED) devices due to their intrinsic and surface defects, indirect band, and disallowable optical transitions. Herein, recent progress on the synthetic strategies, ligands passivation, and metal doping/alloying for boosting efficiency and stability of HDP nanocrystals is comprehensive summarized. It begins by introducing the crystalline structure, electronic structure, and PL mechanism of lead‐free HDPs. Next, the limiting factors on PL properties and origins of instability are analyzed, followed by highlighting the effects of synthesis strategies, ligands passivation, and metal doping/alloying on the PL properties and stability of the HDPs. Then, their preliminary applications for LED devices are emphasized. Finally, the challenges and prospects concerning the development of highly efficient and stable HDP nanocrystals‐based LED devices in the future are proposed.

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Section: Crystal and Electronic Structure Of Halide Double Perovskitesmentioning

confidence: 99%

Lead‐Free Halide Double Perovskite Nanocrystals for Light‐Emitting Applications: Strategies for Boosting Efficiency and Stability

et al. 2021

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“…Despite the isolated octahedral BX 6 units, the close-packed iodide lattice provides electronic dispersion, and Cs 2 SnI 6 and other perovskites were applied to solar cells [237,238]. Pb free solar cells such as FA 4 GeSbCl 12 have been reported [239], in which the double elements were selected to replace Pb. Cs 2 TiIxBr 6−x vacancy-ordered double perovskite compounds were also reported to have stability and bandgaps between 1.0 and 1.8 eV [240].…”

Section: Low-dimensional Perovskitesmentioning

confidence: 99%

Crystal structures of perovskite halide compounds used for solar cells

Oku

2020

Reviews on Advanced Materials Science

103

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AbstractThe crystal structures of various types of perovskite halide compounds were summarized and described. Atomic arrangements of these perovskite compounds can be investigated by X-ray diffraction and transmission electron microscopy. Based on the structural models of basic perovskite halides, X-ray and electron diffractions were calculated and discussed to compare with the experimental data. Other halides such as elemental substituted or cation ordered double perovskite compounds were also described. In addition to the ordinary 3-dimensional perovskites, low dimensional perovskites with 2-, 1-, or 0-dimensionalities were summarized. The structural stabilities of the perovskite halides could be investigated computing the tolerance and octahedral factors, which can be useful for the guideline of elemental substitution to improve the structures and properties, and several low toxic halides were proposed. For the device conformation, highly crystalline-orientated grains and dendritic structures can be formed and affected the photo-voltaic properties. The actual crystal structures of perovskite halides in the thin film configuration were studied by Rietveld analysis optimizing the atomic coordinates and occupancies with low residual factors. These results are useful for structure analysis of perovskite halide crystals, which are expected to be next-generation solar cell materials.

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“…[ 2,16–22,33,36,43,46 ] The physical parameters of TCO, ETL, IDL1, IDL2, and HTL for these simulations are shown in Tables S1–S3, Supporting Information. [ 15–70 ] Herein, IDL1 and IDL2 represent the interface defect layers (IDLs) at ETL/absorber and absorber/HTL interfaces, respectively, to account for high defect density and interface recombination. This approach of modeling perovskite solar cells with n‐i‐p junction configuration has been previously demonstrated by Minemoto et al for MAPbI 3 [ 26,27,51 ] and seems valid for all Pb‐free compositions due to mostly intrinsic nature of these materials.…”

Section: Device Modelmentioning

confidence: 99%

“…However, both Sn 2+ and Ge 2+ easily convert to 4+ oxidation state, resulting in low stability and lack of reproducibility for these ABX 3 (B = Sn 2+ , Ge 2+ ) devices. [ 18,19 ] Many other Pb‐free compositions such as FA 4 GeSbCl 12 , [ 20 ] Cs 2 TiBr 6 , [ 21 ] and Cs 2 PtI 6 [ 22 ] have recently been reported with promising PCEs of 4.7%, 3.28%, and 13.88%, respectively. Many promising Pb‐free perovskite compositions have also been proposed using atomistic calculations with direct bandgaps, high carrier mobilities, and lifetimes.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Pb‐Free Perovskite Absorber Materials: Prospects and Challenges

2020

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Optoelectronic properties of organic-inorganic halide perovskites are exceptional with solar cells showing efficiency comparable with conventional photovoltaic technologies. However, with issues of material stability and toxicity of Pb, it is important to understand if Pb can be replaced while maintaining the high power conversion efficiencies of (FA,MA,Cs)Pb(I,Br) 3. Herein, practical efficiency limits of Pb and Pb-free perovskite absorbers are analyzed using a 1D simulator for n-i-p or p-in device structures. SCAPS-1D baseline models for perovskite absorber materials with and without Pb are developed to numerically reproduce the experimental current density-voltage (JV) and external quantum efficiency (EQE) of champion devices from literature. From these baseline models, the efficiency limits are determined based on optimizing the interface band alignments, reduction in midgap defect density, increased absorption coefficient, and no parasitic losses. SCAPS-1D simulations suggest that 1) theoretically determined efficiency limit of Cs 2 PtI 6 perovskites is comparable with (FA,MA,Cs)Pb(I,Br) 3 perovskites, 2) FA 4 GeSbCl 12 is a promising photoabsorber; and 3) for efficient photoconversion with Sn-, Ge-, Ti-, or Ag-based compounds, a reduction of defect density and increase in absorption coefficient is needed.

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Lead-free, stable, and effective double FA4GeIISbIIICl12 perovskite for photovoltaic applications

Cited by 37 publications

References 43 publications

Lead‐Free Halide Double Perovskite Nanocrystals for Light‐Emitting Applications: Strategies for Boosting Efficiency and Stability

Lead‐Free Halide Double Perovskite Nanocrystals for Light‐Emitting Applications: Strategies for Boosting Efficiency and Stability

Crystal structures of perovskite halide compounds used for solar cells

Numerical Analysis of Pb‐Free Perovskite Absorber Materials: Prospects and Challenges

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