Evidence for exciton confinement in crystalline organic multiple quantum wells.
Evidence for exciton confinement in crystalline organic multiple quantum wells.
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DOI：
10.1103/physrevlett.66.2649
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发表时间：
1991-05
影响因子：
8.6
通讯作者：
So;Forrest
中科院分区：
文献类型：
--
作者：
So;Forrest
用有机分子束沉积方法生长了2种晶体有机半导体，即3，4，9，10-二苯四甲酸二酸酐和3，4，7，8-萘四甲酸二酸酐的多量子阱结构。光吸收和时间分辨光致发光测量都表明，载流子局域化对激子的结合能和辐射复合几率有很大影响。对量子阱中的基态激子能量进行了变分计算，计算结果与实验数据符合较好。这为有机量子井结构中的激子限制提供了证据。
Multiple-quantum-well structures based on two crystalline organic semiconductors, namely, 3,4,9,10 perylenetetracarboxylic dianhydride and 3,4,7,8 naphthalenetetracarboxylic dianhydride, have been grown by organic molecular-beam deposition. Both optical-absorption and time-resolved photoluminescence measurements reveal a significant effect on the binding energy and the radiative recombination probability of excitons due to localization of carriers. Variational calculations of the ground-state exciton energy in quantum wells have been done, and the results agree with the experimental data. This provides evidence for exciton confinement in organic quantum-well structures