Large enhanced conversion efficiency of perovskite solar cells by CsBr doping

Zhang, Liying; Zhang, Yong; Guan, Weibao; Wang, Kefan; Cheng, Zhenxiang; Wang, Yuanxu

doi:10.1007/s10853-017-1429-3

Cited by 7 publications

(16 citation statements)

References 23 publications

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“…The introduction of Cs + into the precursor solution by one-step spin-coating would inevitably accelerate the film deposition rate, leading to a smaller grain size. In addition to Cs + , Niu et al [ 116 ] and Zhang et al [ 117 ] also incorporated Br − into the perovskite layer. In this way, Niu et al were able to control the orientation ((112)/(200)) of the pure tetragonal phase of (MAPbI 3 ) 1− x (CsPbBr 3 ) x .…”

Section: Hybrid Cations In Perovskites For Improvements In Psc Stamentioning

confidence: 99%

The Impact of Hybrid Compositional Film/Structure on Organic–Inorganic Perovskite Solar Cells

Chen

et al. 2018

Nanomaterials

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Perovskite solar cells (PSCs) have been intensively investigated over the last several years. Unprecedented progress has been made in improving their power conversion efficiency; however, the stability of perovskite materials and devices remains a major obstacle for the future commercialization of PSCs. In this review, recent progress in PSCs is summarized in terms of the hybridization of compositions and device architectures for PSCs, with special attention paid to device stability. A brief history of the development of PSCs is given, and their chemical structures, optoelectronic properties, and the different types of device architectures are discussed. Then, perovskite composition engineering is reviewed in detail, with particular emphasis on the cationic components and their impact on film morphology, the optoelectronic properties, device performance, and stability. In addition, the impact of two-dimensional and/or one-dimensional and nanostructured perovskites on structural and device stability is surveyed. Finally, a future outlook is proposed for potential resolutions to overcome the current issues.

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Section: Hybrid Cations In Perovskites For Improvements In Psc Stamentioning

confidence: 99%

The Impact of Hybrid Compositional Film/Structure on Organic–Inorganic Perovskite Solar Cells

Chen

et al. 2018

Nanomaterials

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“…These ions can be introduced into the CH 3 NH 3 PbI 3 perovskite as CsBr to form triple cation materials. [109] As shown by X-ray diffraction (XRD), Br À tends to replacet he I À ions linked to the Pb 2 + ones inducing modifications in the morphology of the perovskite film. Br À allows the growth of larger grains with a consequente nhancement of optical absorption:t he grain size increased from 42.5 to 63.5 nm in the absence of doping and upon addition of 10 %o fC sBr,r espectively.T he largerg rain size indicatesasmallera rea occupied by grain boundaries, which resultsi nf ewer interface defects to induce the recombination of photogenerated carriers ( Figure 3H).…”

Section: Caesium-doping In Hybrid Perovskitesmentioning

confidence: 99%

“…[114] The average current carrying ability of the mixed-perovskite was enhanced and a delocalized distribution of charges was observed across the surfacei nt he presence of Spiro-OMeTAD.I nm ixed halide perovskites, the incorporation of Cs reduced the recombination resistance and increased the electron lifetime. [107][108][109] The synthesis of quasi-2D perovskites was reported by Hamaguchie tal. in 2017 by reacting the organoamineh alide acid salt n-C 6 H 13 NH 3 Ia nd methylammonium iodide (MAI) or FAI or CsI with PbI 2 in stoichiometric amountse mploying DMSO or DMF as solvents according to the stabilityo ft he precursors.…”

Section: Caesium-doping In Hybrid Perovskitesmentioning

confidence: 99%

“…H) Top view (left column) and cross‐sectional (right column) SEM images of perovskite films with different CsBr doping levels. Adapted and reprinted with permission …”

Section: Caesium‐doping In Hybrid Perovskitesmentioning

confidence: 99%

“…Co‐doping with both Br − and Cs + ions is another way to improve both the stability and the efficiency of perovskites. These ions can be introduced into the CH 3 NH 3 PbI 3 perovskite as CsBr to form triple cation materials . As shown by X‐ray diffraction (XRD), Br − tends to replace the I − ions linked to the Pb 2+ ones inducing modifications in the morphology of the perovskite film.…”

Section: Caesium‐doping In Hybrid Perovskitesmentioning

confidence: 99%

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Caesium for Perovskite Solar Cells: An Overview

Bella

Renzi

Cavallo

et al. 2018

Chemistry A European J

150

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Perovskite solar cells have the potential to revolutionize the world of photovoltaics, and their efficiency close to 23 % on a lab-scale recently certified this novel technology as the one with the most rapidly raising performance per year in the whole story of solar cells. With the aim of improving stability, reproducibility and spectral properties of the devices, in the last three years the scientific community strongly focused on Cs-doping for hybrid (typically, organolead) perovskites. In parallel, to further contrast hygroscopicity and reach thermal stability, research has also been carried out to achieve the development of all-inorganic perovskites based on caesium, the performances of which are rapidly increasing. The potential of caesium is further strengthened when it is used as a modifying agent of charge-carrier layers in solar cells, but also for the preparation of perovskites with peculiar optoelectronic properties for unconventional applications (e.g., in LEDs, photodetectors, sensors, etc.). This Review offers a 360-degree overview on how caesium can strongly tune the properties and performance of perovskites and relative perovskite-based devices.

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