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The time-resoved photoluminescence spectra of C60 have been studied from toluence solution at room temperature and from thin film at both room temperature and 77K. A photoluminescence peak at about 730nm was detected from solution at room temperature and film at 77K, in which lifetimes waz determined to be 1.1 and 0.9ns, respectively. At room temperature, the photoluminescence peak of thin film shifted to 740 nm with fast decay behavior which was fitted well to a double-exponential lifetimes with τ1 = 0.087ns, τ2= 0.68 ns. Two relaxation mechanisms are given tentatively in explaining this phenomenon. 相似文献
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利用π-A等温线、小角X射线衍射(SAXD)和光学测量方法研究了一种取代富勒烯(C60-Be)LB膜的结构特性。纯C60-Be分子以体相(bulkphase)的形式存在于气-液界面上。氮冠(醚)(NC)分子作为隔层材料,与C60-Be分子相混合可以制备性能优良的LB膜。π-A、吸收和小角X光衍射测量表明:这种混合膜结构的改善是由于C60-Be分子镶嵌在NC分子的双脂链之间造成的。通过测量三次谐波产生(THG)可以推出C60-Be的三阶非线性系数χ(3)=2.1×10-11esu。 相似文献
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