Pressure Response of an Organic−Inorganic Perovskite:  Methylammonium Lead Bromide

Swainson, I. P.; Tucker, Matthew G.; Wilson, Dan J.; Winkler, and B.; Milman, Victor

doi:10.1021/cm0621601

Cited by 129 publications

(192 citation statements)

References 33 publications

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“…Fig. to I4/mcm at 236.3 K, to P4/mmm at 154.0 K, and to Pna21 at 148.8 K), 50 while only one phase transformation from Pm-3m to Im-3 under high pressure (below 1 GPa) was reported by Swainson et al 41 They also suggested an orthorhombic phase with space group Pnma under higher pressure by DFT calculations. With the increase of pressure, some sharp rings become weaker and new broad rings appear, indicating the onset of structural disorder and partial amorphization.…”

Section: Resultsmentioning

confidence: 84%

“…41 The asgrown orange microcrystals show good phase purity in cubic phase with space group Pm-3m (lattice constants of a = 8.4413(6) Å), and green emission under UV irradiation (As shown in Fig. 41 The asgrown orange microcrystals show good phase purity in cubic phase with space group Pm-3m (lattice constants of a = 8.4413(6) Å), and green emission under UV irradiation (As shown in Fig.…”

Section: Resultsmentioning

confidence: 96%

“…With the increase of pressure, some sharp rings become weaker and new broad rings appear, indicating the onset of structural disorder and partial amorphization. It appears that the tilting distortion of PbBr6 octahedral dominates the two phase transformations (a + a + a + for Im-3, a + bbfor Pnma), 41 and the MA cations may not undergo long-range orientation ordering and only contribute to the broad diffraction background. The d value of the strongest broad ring (3.5-4.0 Å) is consistent with the nearest Br-Br distance in close-packed Branions.…”

Section: Resultsmentioning

confidence: 99%

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Pressure-Induced Phase Transformation, Reversible Amorphization, and Anomalous Visible Light Response in Organolead Bromide Perovskite

et al. 2015

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Hydrostatic pressure, as an alternative of chemical pressure to tune the crystal structure and physical properties, is a significant technique for novel function material design and fundamental research. In this article, we report the phase stability and visible light response of the organolead bromide perovskite, CH3NH3PbBr3 (MAPbBr3), under hydrostatic pressure up to 34 GPa at room temperature. Two phase transformations below 2 GPa (from Pm3̅m to Im3̅, then to Pnma) and a reversible amorphization starting from about 2 GPa were observed, which could be attributed to the tilting of PbBr6 octahedra and destroying of long-range ordering of MA cations, respectively. The visible light response of MAPbBr3 to pressure was studied by in situ photoluminescence, electric resistance, photocurrent measurements and first-principle simulations. The anomalous band gap evolution during compression with red-shift followed by blue-shift is explained by the competition between compression effect and pressure-induced amorphization. Along with the amorphization process accomplished around 25 GPa, the resistance increased by 5 orders of magnitude while the system still maintains its semiconductor characteristics and considerable response to the visible light irradiation. Our results not only show that hydrostatic pressure may provide an applicable tool for the organohalide perovskites based photovoltaic device functioning as switcher or controller, but also shed light on the exploration of more amorphous organometal composites as potential light absorber.

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Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

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Pressure-Induced Phase Transformation, Reversible Amorphization, and Anomalous Visible Light Response in Organolead Bromide Perovskite

et al. 2015

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“…61 The volume reduction under compression was attributed to the tilting of PbBr 6 octahedra. Suga and co-workers also gave the pressure-temperature phase relations of CH 3 NH 3 PbX 3 (X= Cl, Br, I) crystals in the range between 0.1 Pa and 200 MPa in detail.…”

Section: Crystal Structure Stability Of Perovskitementioning

confidence: 99%

Review of recent progress in chemical stability of perovskite solar cells

2015

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In recent years, the record efficiency of perovskite solar cells (PSCs) has been updated from 9.7% to 20.1%. But for the issue of stability, which restricts the outdoor application of PSCs, study still remains blank. The issue of the degradation of perovskite and stability of the device should be addressed urgently to achieve the good reproducibility and long lifetime of PSCs with high conversion efficiency. Without the study on stability, the exciting achievements can not be transferred from laboratory to industry and outdoor applications. In order to improve the stability, basic understanding about the degradation process of PSCs in different conditions should be studied thoroughly. This review summarizes the recent study about the relationship of chemical stability of PSCs with environments (oxygen and moisture, UV light, solution process, and temperature etc.) and the corresponding possible solutions.

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“…I. P. Swainson et al studied the structural transition behavior of MAPbBr 3 as a function of pressure (slightly above 3 GPa) and temperature (RT ≈ 80 K). [ 110 ] They found that the energy gain for orientational ordering was low and the reduction of the unit cell volume was the main driving force for the transitions of the perovskite compounds under pressure. Evidently, the phase transition/symmetry variation caused by octahedra tilting signifi cantly infl uences the electronic and optical properties of the perovskites, and affects the photovoltaic performance of MPSCs.…”

Section: Thermal Effectmentioning

confidence: 99%

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

Rong

Liu

Mei

et al. 2015

Advanced Energy Materials

426

329

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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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Pressure Response of an Organic−Inorganic Perovskite: Methylammonium Lead Bromide

Cited by 129 publications

References 33 publications

Pressure-Induced Phase Transformation, Reversible Amorphization, and Anomalous Visible Light Response in Organolead Bromide Perovskite

Pressure-Induced Phase Transformation, Reversible Amorphization, and Anomalous Visible Light Response in Organolead Bromide Perovskite

Review of recent progress in chemical stability of perovskite solar cells

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

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