Photon pair correlation spectroscopy of single tetrahedral oligophenylenevinylene molecules at room temperature

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• 作者：Bussian ; David A. ; Summers ; Melissa A. ; Liu ; Bin ; Bazan ; Guillermo C. ; Buratto ; Steven K.
• 刊名：Chemical Physics Letters
• 出版年：2004
• 期刊代码：7_00092614
• 类别：ph
• 出版时间：April 11, 2004
• 卷：388
• 期：1-3
• 页码：181-185
• 文件大小：242 K

摘要

We have examined the photon statistics of single tetrahedral based oligophenylenevinylene (TOPV) molecules using photon pair correlation spectroscopy (PPCS). The second-order correlation function g⁽²⁾(τ) can be obtained from PPCS and the value of g⁽²⁾(τ) at small τ can be used to quantify the number of chromophores involved in emission. Comparison of g⁽²⁾(τ) obtained from OPV `arms' versus TOPV revealed limited interchromophore coupling in TOPV. Unlike previous studies on interchromophore coupling in organic semiconductors, TOPV molecules are able to sustain simultaneous emission from multiple arms.