阳离子混合对pbi2基有机/无机钙钛矿薄膜光致发光的影响

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI:10.1080/10587250108030052

Yumeko Komatsu, N. Sakamoto, M. Era

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引用次数: 1

摘要

摘要研究了阳离子混合对化学式(C6H9C2H4NH3)2PbI4表示的pbi2基有机/无机钙钛矿薄膜光致发光(PL)的影响。由于(CHE)2(Pb,M)I4薄膜的所有光谱都是相同的，因此通过添加ZnI2或CdI2将阳离子混合到无机层中不会影响薄膜中激子的特性。在2.4eV光子能量(PL2.4)下，外加阳离子的种类改变了无机层组成对PL强度的依赖性。在添加Zn的情况下，随着Zn添加量的增加，PL2.4均匀降低。另一方面，(C6H9C2H4NH3)2(Pb, Cd)I4薄膜的PL2.4随着Cd浓度的增加而显著增加，Cd浓度达到20mol%Cd。结果表明，与Cd的阳离子混合可以有效地提高(C6H9C2H4NH3)2PbI4薄膜的光学性能。通过XRD结构分析，探讨了PL2.4与薄膜层状结构的关系。

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Effect of Cation-Mixing on Photo Luminescence of PbI2-based Organic/Inorganic Perovskite Thin Films

Abstract The influence of cation-mixing on photo luminescence(PL) of PbI2-based organic/inorganic perovskite thin films expressed by chemical formula (C6H9C2H4NH3)2PbI4 was investigated. Cation-mixing to inorganic layer by addition of ZnI2 or CdI2 did not affect the character of exciton in the films because all optical spectra of the (CHE)2(Pb,M)I4 films were the same profile. Dependence of PL intensity at 2.4eV of photon energy(PL2.4) on inorganic layer compositions was changed by kind of additive cation. In the case of Zn addition, PL2.4 was uniformly decreased with an increase of additive amounts of Zn. On the other hand, PL2.4 of the (C6H9C2H4NH3)2(Pb, Cd)I4 films remarkably increased with increasing of Cd concentration up to 20mol%Cd. It was obvious that cation-mixing with Cd is effective to advance the optical properties of the (C6H9C2H4NH3)2PbI4 films. Relationships between PL2.4 and layer structure of the films were discussed according to structural analysis using XRD.

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Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals

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