001044268 001__ 1044268
001044268 005__ 20250729202320.0
001044268 037__ $$aFZJ-2025-03138
001044268 041__ $$aEnglish
001044268 1001_ $$0P:(DE-Juel1)176471$$aFreter, Lars$$b0
001044268 1112_ $$a50th Conference on the Physics and Chemistry of Surfaces and Interfaces$$cKona$$d2025-01-19 - 2025-01-23$$gPCSI-50$$wUSA
001044268 245__ $$aImportance of Molecular Dipole Alignment and Surface Compensation in P-V Hysteresis of MAPbBr3(001)
001044268 260__ $$c2025
001044268 3367_ $$033$$2EndNote$$aConference Paper
001044268 3367_ $$2DataCite$$aOther
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001044268 3367_ $$2DRIVER$$aconferenceObject
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001044268 3367_ $$0PUB:(DE-HGF)6$$2PUB:(DE-HGF)$$aConference Presentation$$bconf$$mconf$$s1753774566_5604$$xOther
001044268 520__ $$aMetalorganic halide perovskites attracted extraordinary attention as low-cost photovoltaic materials, due to their rapid increase of the conversion efficiency within a few years only. However, it is unclear to what degree the reported conversion efficiencies extracted from current density versus voltage (J-V) curves are accurate, since J-V hystereses are known to make “bad cells look good”. It is thus of paramount importance to unravel the physical mechanisms inducing hysteresis, but no consent has been achieved yet. We demonstrate the presence of a hysteresis in tunneling spectra acquired at 4.3 K on cleaved MA-Br terminated (001) surfaces of MAPbBr3 single crystals. Simulations of the tunneling spectra reveal an underlying polarization-voltage (P-V) hysteresis, caused by an interplay of field-induced rotation and alignment of the MA molecules, stabilized by dipole-dipole interactions, and an ion-lattice relaxation. The field-induced, ferroelectric polarization in the bulk is compensated at the surface by an oppositely oriented, counteracting out-of-plane polarization component of the otherwise in-plane antiferroelectrically ordered surface dipole arrangement. This suggests that at low temperatures only ferroelectric effects govern the hysteresis in MAPbBr3 and its related compounds, whereas at high temperatures thermally activated processes such as ion migration and charge trapping-detrapping dominate
001044268 536__ $$0G:(DE-HGF)POF4-5351$$a5351 - Platform for Correlative, In Situ and Operando Characterization (POF4-535)$$cPOF4-535$$fPOF IV$$x0
001044268 536__ $$0G:(GEPRIS)447951695$$aDFG project G:(GEPRIS)447951695 - Mikroskopische Untersuchung der Umordnung von Molekül-Dipolen in Organo-Metall-Halogenid-Perowskiten (447951695)$$c447951695$$x1
001044268 7001_ $$0P:(DE-HGF)0$$aHsu, Hung-Chung$$b1
001044268 7001_ $$0P:(DE-HGF)0$$aSankar, Raman$$b2
001044268 7001_ $$0P:(DE-HGF)0$$aChen, Chun- Wei$$b3
001044268 7001_ $$0P:(DE-Juel1)144121$$aDunin-Borkowski, Rafal$$b4$$ufzj
001044268 7001_ $$0P:(DE-Juel1)130627$$aEbert, Philipp$$b5$$ufzj
001044268 7001_ $$0P:(DE-HGF)0$$aChiu, Ya-Ping$$b6
001044268 7001_ $$0P:(DE-Juel1)143949$$aSchnedler, Michael$$b7$$eCorresponding author$$ufzj
001044268 8564_ $$uhttps://pcsi2025.avs.org/wp-content/uploads/2024/10/Technical-Program.pdf
001044268 909CO $$ooai:juser.fz-juelich.de:1044268$$pVDB
001044268 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$a National Taiwan University, Taiwan$$b1
001044268 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$a Academia Sinica, Taiwan$$b2
001044268 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$a National Taiwan University, Taiwan$$b3
001044268 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)144121$$aForschungszentrum Jülich$$b4$$kFZJ
001044268 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130627$$aForschungszentrum Jülich$$b5$$kFZJ
001044268 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$a National Taiwan University, Taiwan$$b6
001044268 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)143949$$aForschungszentrum Jülich$$b7$$kFZJ
001044268 9131_ $$0G:(DE-HGF)POF4-535$$1G:(DE-HGF)POF4-530$$2G:(DE-HGF)POF4-500$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF4-5351$$aDE-HGF$$bKey Technologies$$lMaterials Systems Engineering$$vMaterials Information Discovery$$x0
001044268 9141_ $$y2025
001044268 920__ $$lyes
001044268 9201_ $$0I:(DE-Juel1)ER-C-1-20170209$$kER-C-1$$lPhysik Nanoskaliger Systeme$$x0
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