MAGNETOABSORPTION OF THE LOWEST EXCITON IN PEROVSKITE-TYPE COMPOUND (CH3NH3)PBI3
MAGNETOABSORPTION OF THE LOWEST EXCITON IN PEROVSKITE-TYPE COMPOUND (CH3NH3)PBI3
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DOI：
10.1016/0921-4526(94)91130-4
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发表时间：
1994-07-01
期刊：
影响因子：
2.8
通讯作者：
MIURA, N
中科院分区：
文献类型：
--
作者：
HIRASAWA, M;ISHIHARA, T;MIURA, N
研究了（CH_3 NH_3）PbI_3在法拉第组态下的磁吸收谱，温度为4.2 K，磁场强度为40 T。 该化合物由角共享八面体[PbI 6]4-的三维网络组成。 观察到塞曼分裂和抗磁位移，有效g因子和抗磁系数分别为1.2 +/-0.1和2.7 +/-0.1 × 10（-6）eV/T2。 由反磁位移估算出激子的玻尔半径为28埃，束缚能为37 meV，约化质量为0.12m（o）。 （CH_3NH_3）PbI_3中的激子是一种典型的Wannier型激子，具有较大的半径，而（C_10H_21NH_3）_2PbI_4中的激子是由[PbI_6]_4 ~-的二维网络结构组成。
Magnetoabsorption spectra of (CH3NH3)PbI3 are investigated in the Faraday configuration up to 40 T at 4.2 K. The compound consists of three-dimensional networks of corner-sharing octahedra [PbI6]4-. The Zeeman splitting and the diamagnetic shift are observed, and the effective g-factor and the diamagnetic coefficient are 1.2 +/- 0.1 and (2.7 +/- 0.1) x 10(-6) eV/T2, respectively. From the diamagnetic shift, the Bohr radius, the binding energy and the reduced mass of the exciton are estimated to be 28 angstrom, 37 meV and 0.12m(o), respectively. The exciton in (CH3NH3)PbI3 is one of typical Wannier-type excitons with large radius, which is in contrast with the exciton in (C10H21NH3)2PbI4, consisting of two-dimensional networks of [PbI6]4-.