Magnetoresistance of (CH3NH3)PbI3 coated La0.67Sr0.33MnO3 granular composites

2015 IEEE Magnetics Conference (INTERMAG) Pub Date : 2015-06-01 DOI:10.1109/INTMAG.2015.7157755

K. Zhu, J. Chen, Q. Fan, L. Wang, Q. Xu

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Abstract

There have been increasing research activities on organic spintronics, due to the long spin relaxation time in organic semiconductors which allows retaining the spin information. Generally, the widely used organic semiconductors are tris-(8, hydroxyquinoline) aluminum (Alq3), oleic acid, poly (3-hexyl thiophene)(RRP3HT), etc. Recently, the inorganic-organic perovskite family of materials taking the form ABX₃ (A = CH₃NH₃⁺; B = Pb²⁺; and X=Cl^-, I^-, and/or Br) have attracted intensive research interests, due to the dramatically increasing efficiency in the hybric solar cell [1]. It has been reported that CH₃NH₃PbI_3-xCl_x has very long electron-hole diffusion length (~100 nm for CH₃NH₃PbI₃ and ~ 1 μm for CH₃NH₃PbI_3-xCl_x) [1], suggesting the possible applicaton in organic spintronics. In this work, we prepared the CH₃NH₃PbI₃ coated La_0.67Sr_0.33MnO₃ (LSMO) granular composites, and the magnetoresistance (MR) was studied.

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(CH3NH3)PbI3包覆La0.67Sr0.33MnO3颗粒复合材料的磁阻

有机自旋电子学的研究越来越多，因为有机半导体的自旋弛豫时间长，可以保留自旋信息。一般来说，广泛应用的有机半导体有三-(8，羟基喹啉)铝(Alq3)、油酸、聚(3-己基噻吩)(RRP3HT)等。近来，无机-有机钙钛矿族材料呈现ABX3 (A = CH3NH3+;B = Pb2+;和X=Cl-， I-，和/或Br)已经引起了广泛的研究兴趣，由于混合太阳能电池的效率显著提高[1]。据报道，CH3NH3PbI3- xclx具有很长的电子空穴扩散长度(CH3NH3PbI3为~100 nm, CH3NH3PbI3- xclx为~1 μm)[1]，这表明CH3NH3PbI3- xclx有可能在有机自旋电子学中应用。本文制备了CH3NH3PbI3包覆La0.67Sr0.33MnO3 (LSMO)颗粒状复合材料，并对其磁阻(MR)进行了研究。

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2015 IEEE Magnetics Conference (INTERMAG)

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