Influence of the image charge effect on excitonic energy structure in organic-inorganic multiple quantum well crystals
Influence of the image charge effect on excitonic energy structure in organic-inorganic multiple quantum well crystals
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DOI：
10.1103/physrevb.87.125421
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发表时间：
2013-03
影响因子：
3.7
通讯作者：
H. Takagi;H. Kunugita;K. Ema
中科院分区：
文献类型：
--
作者：
H. Takagi;H. Kunugita;K. Ema
利用光致发光、反射和光致发光激发测量方法，对混合多量子威尔斯阱（CH-CHNH）PbBrand（CHNH）PbBr的激子性质进行了实验比较。我们着重研究了像电荷效应（ICE）对具有不同势垒层介电常数的材料中激子能量结构的贡献。我们发现ICE使激子和激子的结合能显著增强，而ICE对激子的贡献较小，这是因为ICE具有与阱宽相当的小玻尔半径。
We have experimentally compared the excitonic properties of hybrid multiple quantum wells, (CH-CHNH)PbBrand (CHNH)PbBr, using photoluminescence, reflection, and photoluminescence excitation measurements. We focused on the contribution of the image charge effect (ICE) to the excitonic energy structure in these materials which have different dielectric constants of the barrier layers. We have found that the binding energies of theandexcitons are considerably enhanced by ICE, while the contribution of ICE to theexcitons is smaller because of the small Bohr radius, which is comparable to the well width.