Image charge effect on two-dimensional excitons in an inorganic-organic quantum-well crystal
Image charge effect on two-dimensional excitons in an inorganic-organic quantum-well crystal
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DOI：
10.1103/physrevb.71.045312
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发表时间：
2005-01-01
影响因子：
3.7
通讯作者：
Ema, K
中科院分区：
文献类型：
--
作者：
Tanaka, K;Takahashi, T;Ema, K
我们报道了一个明确的实验证据的图像电荷效应的激子的光学和电吸收光谱的无机-有机量子阱晶体（C6 H 13 NH 3）（2）PbI 4。ns（n ≥ 2）Wannier系列激子是理想的二维激子，其结合能受到空间限制效应和镜像电荷效应的共同增强。异常大的结合能的1 s激子（361毫电子伏）也是由于突出的图像电荷效应。我们还观察到独特的蓝移的1 s激子下的电场垂直于量子阱层，我们证明了与计算的图像电荷效应起着重要的作用。
We report a clear experimental evidence of the image charge effect on excitons in the optical and electroabsorption spectra of an inorganic-organic quantum-well crystal (C6H13NH3)(2)PbI4. The ns (ngreater than or equal to2) Wannier series are ideal two-dimensional excitons whose binding energies are enhanced by both the spatial confinement and image charge effects. Exceptionally large binding energy of the 1s exciton (361 meV) is also due to the prominent image charge effect. We also observed unique blueshifts of the 1s excitons under the electric field perpendicular to the quantum-well layers, for which we demonstrated with calculations that the image charge effect plays a significant role.