p-T phase relations of CH3NH3PbX3 (X = Cl, Br, I) crystals

Onoda-Yamamuro, Noriko; Yamamuro, Osamu; Matsuo, Takasuke; Suga, Hiroshi

doi:10.1016/0022-3697(92)90056-j

Cited by 95 publications

(97 citation statements)

References 9 publications

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“…CH 3 NH 3 PbBr 3 crystallizes in the cubic phase at room temperature (fig. S1) ( 35 ). By replacing the iodide with bromide, the bandgap increases from 1.61 eV in CH 3 NH 3 PbI 3 to 2.36 eV in CH 3 NH 3 PbBr 3 at 300 K ( 36 ).…”

Section: Resultsmentioning

confidence: 99%

Origin of unusual bandgap shift and dual emission in organic-inorganic lead halide perovskites

et al. 2016

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Section: Resultsmentioning

confidence: 99%

Origin of unusual bandgap shift and dual emission in organic-inorganic lead halide perovskites

et al. 2016

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“…MAPbBr 3 is stable in the cubic phase above ¹37°C, 18 but MAPbI 3 undergoes a second-order phase transition from the tetragonal to cubic phase at 54°C, 19 lower than or close to the temperatures for crystal growth in Table 1. Consequently, indexing the natural facets of MAPbI 3 to the cubic system properly reflects the surface structures during crystal growth, and also simplifies our analysis for the growth mechanism.…”

mentioning

confidence: 88%

Preferential Facet Growth of Methylammonium Lead Halide Single Crystals Promoted by Halide Coordination

Zhang¹,

Huang²,

Mi³

2016

Chem. Lett.

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Perovskite solar cells utilize solution-processed CH 3 NH 3 PbI 3 thin films as the active layer material, whose morphology and exposed facets directly contribute to the device efficiency and stability. We investigated various conditions for growing CH 3 NH 3 PbX 3 (X = Br, I) crystals from solutions, and found that bromide, nonaqueous solvents, and higher X ¹ /PbX 2 ratios favor the growth of cuboids over dodecahedra. We propose that these factors promote the coordination of X ¹ to Pb 2+ on the growing surfaces, thus making the {110} c faces outgrow the {100} c faces.

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“…[ 113 ] As mentioned in the previous section, at room temperature, MAPbBr 3 crystal is in cubic phase with Pm 3 m space group, whereas MAPbI 3 is in tetragonal crystal arrangement with I 4 / mcm space group. [ 108,111 ] Because the cubic-structured crystals might be more compact than tetragonal ones, the obtained perovskite fi lms are expected to be more resistant to the intrusion of external species such H 2 O. In addition, compared with Pb-I bond, the Pb-Br bond was calculated to be shorter and stronger, [ 133 ] implying it is more diffi cult to be broken.…”

Section: Composition Engineeringmentioning

confidence: 99%

Beyond Efficiency: the Challenge of Stability in Mesoscopic Perovskite Solar Cells

Rong

Liu

Mei

et al. 2015

Advanced Energy Materials

412

326

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Over the past five years, the rapid emergence of a new class of solar cell based on mixed organic–inorganic halide perovskite semiconductors has captured the attention of scientists and researchers in the field of energy conversion. Benefiting from the optimization of perovskite film deposition approaches, the design of new material systems, and the diversity of device concepts, the efficiency of perovskite solar cells (PSCs) has increased from 2.19% in 2006 to a certified 20.1% in 2014, making this the fastest‐advancing solar cell technology to date. However, as a photovoltaic technology, which needs to meet the requirements of working under long‐term sunlight, PSCs suffer stability concerns for both materials and devices. Evolved from dye‐sensitized solar cells (DSSCs), PSCs usually contain a mesoporous electron transporting layer or scaffold layer, a perovskite active layer, a hole transporting layer and a back contact to construct a mesoscopic‐structured device. Using interface engineering, mesoscopic PSCs (MPSCs) have obtained exciting stability with a hole‐conductor‐free printable triple‐layer architecture or conventional heterojunction version. Herein, the achievements of mesoscopic solar cells from solid‐state DSSCs to MPSCs are outlined and summary of recent progress in the stability of MPSCs is presented. Possible degradation mechanism and solutions are presented and, finally, challenges for the commercialization of this photovoltaic technology are discussed.

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p-T phase relations of CH3NH3PbX3 (X = Cl, Br, I) crystals

Cited by 95 publications

References 9 publications

Origin of unusual bandgap shift and dual emission in organic-inorganic lead halide perovskites

Origin of unusual bandgap shift and dual emission in organic-inorganic lead halide perovskites

Preferential Facet Growth of Methylammonium Lead Halide Single Crystals Promoted by Halide Coordination

Beyond Efficiency: the Challenge of Stability in Mesoscopic Perovskite Solar Cells

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