- Efficiencies >20% are obtained from the perovskite solar cells (PSCs) employing Cs+ and Rb+ based perovskite compositions; therefore, it is important to understand the effect of these inorganic cations specifically Rb+ on the properties of perovskite structures. Here the influence of Cs+ and Rb+ is elucidated on the structural, morphological, and photophysical properties of perovskite structures and the photovoltaic performances of resulting PSCs. Structural, photoluminescence (PL), and external quantum efficiency studies establish the incorporation of Cs+ (x < 10%) but amply rule out the possibility of Rb-incorporation into the MAPbI(3) (MA = CH3NH3+) lattice. Moreover, morphological studies and time-resolved PL show that both Cs+ and Rb+ detrimentally affect the surface coverage of MAPbI(3) layers and charge-carrier dynamics, respectively, by influencing nucleation density and by inducing nonradiative recombination. In addition, differential scanning calorimetry shows that the transition from orthorhombic to tetragonal phaseEfficiencies >20% are obtained from the perovskite solar cells (PSCs) employing Cs+ and Rb+ based perovskite compositions; therefore, it is important to understand the effect of these inorganic cations specifically Rb+ on the properties of perovskite structures. Here the influence of Cs+ and Rb+ is elucidated on the structural, morphological, and photophysical properties of perovskite structures and the photovoltaic performances of resulting PSCs. Structural, photoluminescence (PL), and external quantum efficiency studies establish the incorporation of Cs+ (x < 10%) but amply rule out the possibility of Rb-incorporation into the MAPbI(3) (MA = CH3NH3+) lattice. Moreover, morphological studies and time-resolved PL show that both Cs+ and Rb+ detrimentally affect the surface coverage of MAPbI(3) layers and charge-carrier dynamics, respectively, by influencing nucleation density and by inducing nonradiative recombination. In addition, differential scanning calorimetry shows that the transition from orthorhombic to tetragonal phase occurring around 160 K requires more thermal energy for the Cs-containing MAPbI(3) systems compared to the pristine MAPbI(3). Investigation including mixed halide (I/Br) and mixed cation A-cation based compositions further confirms the absence of Rb+ from the 3D-perovskite lattice. The fundamental insights gained through this work will be of great significance to further understand highly promising perovskite compositions.…
MetadatenAuthor details: | Ryusuke Uchida, Silvia Binet, Neha AroraORCiD, Gwenole Jacopin, Mohammad Hayal AlotaibiORCiD, Andreas TaubertORCiDGND, Shaik Mohammed ZakeeruddinGND, M. Ibrahim DarORCiD, Michael GraetzelORCiD |
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DOI: | https://doi.org/10.1002/smll.201802033 |
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ISSN: | 1613-6810 |
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ISSN: | 1613-6829 |
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Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/30091843 |
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Title of parent work (English): | Small |
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Subtitle (English): | Effect on the Structural, Morphological, and Photophysical Properties and Photovoltaic Performance |
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Publisher: | Wiley-VCH |
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Place of publishing: | Weinheim |
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Publication type: | Article |
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Language: | English |
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Date of first publication: | 2018/08/09 |
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Publication year: | 2018 |
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Release date: | 2021/10/04 |
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Tag: | X-ray diffraction; cation miscibility; cesium cation; perovskite solar cells; rubidium cation |
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Volume: | 14 |
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Issue: | 36 |
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Number of pages: | 7 |
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Funding institution: | King Abdulaziz City for Science and Technology (KACST); Greatcell Solar; KACST [20-0180] |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
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DDC classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
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