论文标题
与芳基乙烯烯烯烯烯烯和聚集诱导发射的偶联的CDSE量子点的周期性荧光变化
Periodic Fluorescence Variations of CdSe Quantum Dots Coupled to Aryleneethynylenes with Aggregation Induced Emission
论文作者
论文摘要
将芳烃衍生物的CDSE纳米晶体和聚集体组装成带有来自两个荧光团的双荧光的混合薄膜。在连续激发下，纳米晶体和分子表现出抗相关的荧光强度变化，在低温下变为周期性。我们将其归因于结构依赖性聚集诱导的芳烃衍生物的发射，这会影响分子和纳米晶体之间的激发能传递速率。能量转移还会影响光激发下混合材料的电运性能。这项工作强调，将半导体纳米晶体与表现出聚集诱导的发射的分子聚集体相结合，可能会导致前所未有的新兴光学特性。
CdSe nanocrystals and aggregates of an aryleneethynylene derivative are assembled into a hybrid thin film with dual fluorescence from both fluorophores. Under continuous excitation, the nanocrystals and the molecules exhibit anti-correlated fluorescence intensity variations, which become periodic at low temperature. We attribute this to a structure-dependent aggregation induced emission of the aryleneethynylene derivative, which impacts the rate of excitation energy transfer between the molecules and nanocrystals. Energy transfer also affects the electric transport properties of the hybrid material under optical excitation. This work highlights that combining semiconductor nanocrystals with molecular aggregates, which exhibit aggregation induced emission, can result in unprecedented emerging optical properties.
