2018
DOI: 10.1063/1.5063394
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Pressure effects on the inductive loop, mixed conduction, and photoresponsivity in formamidinium lead bromide perovskite

Abstract: Further efficiency boost of organic-inorganic perovskite solar cells is hampered by limited knowledge on ion migration, inductive loops, and the relationship between structures and properties in organometal halide perovskites. In this work, in situ alternating current impedance spectroscopy measurements on CH(NH2)2PbBr3 (FAPbBr3) have been carried out under high pressure up to 4.8 GPa. The inductive loop has been discovered at low frequencies and can be tuned dramatically by applying pressure, which is attribu… Show more

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Cited by 16 publications
(13 citation statements)
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“…As an effective means of tuning the physical and chemical properties of materials, high pressure can be used to modify photoelectric and related properties via adjustment of the atomic and electronic structures. [19][20][21][22][23][24][25][26][27][28][29][30] Pressure-induced photoelectric performance enhancement has been achieved for several photoelectric materials, such as ReS 2 , [19] KBiFe 2 O 5 , [20] PbBiO 2 Br, [21] and Bi 9 O 7.5 S 6 . [23] However, such enhancement is typically limited.…”
Section: Introductionmentioning
confidence: 99%
“…As an effective means of tuning the physical and chemical properties of materials, high pressure can be used to modify photoelectric and related properties via adjustment of the atomic and electronic structures. [19][20][21][22][23][24][25][26][27][28][29][30] Pressure-induced photoelectric performance enhancement has been achieved for several photoelectric materials, such as ReS 2 , [19] KBiFe 2 O 5 , [20] PbBiO 2 Br, [21] and Bi 9 O 7.5 S 6 . [23] However, such enhancement is typically limited.…”
Section: Introductionmentioning
confidence: 99%
“…In supramolecules, pressure affects the rearrangement of hydrogen-bonded networks by the translation/rotation of the moiety, eventually leading to a phase transition. Experimental studies on hybrid materials under the influence of pressure uncover interesting observations such as the disappearance of the in-plane lattice distortion in layered (C 2 H 5 NH 3 ) 2 CuCl 4 , amorphization of MOF-5 at unusually low pressure, pressure-induced conductivity and piezochromism in 2,2′-(ethylenedioxy)­bis­(ethylammonium) [CuCl 4 ], and the pressure effects on the inductive loop and photoresponsivity in CH­(NH 2 ) 2 PbBr 3 . Guanidinium: [C­(NH 2 ) 3 ] + is a planar organic chemical unit, with a high symmetry D 3 h in free space .…”
Section: Introductionmentioning
confidence: 99%
“…Unlike perovskite photovoltaic materials, e.g. , APbBr 3 (A = Cs, CH 3 NH 3 , CH(NH 2 ) 2 ) for which excellent photoresponse is achieved in their high-pressure phases, 55–57 the optimal bandgap and the peak photocurrent of WZ-CIS can be obtained in the original phase, making this material more promising for pressure-responsive photoelectrical applications.…”
Section: Resultsmentioning
confidence: 99%