Exciton dynamics and non-linearities in two-dimensional hybrid organic perovskites
Exciton dynamics and non-linearities in two-dimensional hybrid organic perovskites
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DOI：
10.1063/1.4941345
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发表时间：
2016-02-14
影响因子：
3.2
通讯作者：
Lauret, J. S.
中科院分区：
文献类型：
--
作者：
Abdel-Baki, K.;Boitier, F.;Lauret, J. S.
由于它们在光伏应用或相干光源方面的高潜力，近年来人们对混合有机钙钛矿重新产生了兴趣。当它们在二维空间中排列时，这些材料可以被认为是混合量子阱。二维杂化有机钙钛矿的独特结构的一个结果是可以通过化学工程定制巨大的激子结合能。本文利用飞秒泵浦探测光谱对激子非线性进行了实验研究。激子动力学符合双指数衰减，自由激子寿命接近100ps。此外，超快带内弛豫(
Due to their high potentiality for photovoltaic applications or coherent light sources, a renewed interest in hybrid organic perovskites has emerged for few years. When they are arranged in two dimensions, these materials can be considered as hybrid quantum wells. One consequence of the unique structure of 2D hybrid organic perovskites is a huge exciton binding energy that can be tailored through chemical engineering. We present experimental investigations of the exciton non-linearities by means of femtosecond pump-probe spectroscopy. The exciton dynamics is fitted with a bi-exponential decay with a free exciton life-time of similar to 100 ps. Moreover, an ultrafast intraband relaxation (