5 years ago

Synthesis of Dibenzo[hi,st]ovalene and Its Amplified Spontaneous Emission in a Polystyrene Matrix

Synthesis of Dibenzo[hi,st]ovalene and Its Amplified Spontaneous Emission in a Polystyrene Matrix
Silvia G. Motti, Annamaria Petrozza, Qiang Chen, Klaus Müllen, Akimitsu Narita, Giuseppe M. Paternò, Xiao-Ye Wang, Junzhi Liu, Xinliang Feng, Francesco Scotognella, Guglielmo Lanzani
A large number of graphene molecules, or large polycyclic aromatic hydrocarbons (PAHs), have been synthesized and display various optoelectronic properties. Nevertheless, their potential for application in photonics has remained largely unexplored. Herein, we describe the synthesis of a highly luminescent and stable graphene molecule, namely a substituted dibenzo[hi,st]ovalene (DBO 1), with zigzag edges and elucidate its promising optical-gain properties by means of ultrafast transient absorption spectroscopy. Upon incorporation of DBO into an inert polystyrene matrix, amplified stimulated emission can be observed with a relatively low power threshold (ca. 60 μJ cm−2), thus highlighting its high potential for lasing applications. Graphene molecules as nanoscale and structurally precise fragments of graphene have recently emerged as promising optoelectronic materials. A novel, highly luminescent, and stable graphene molecule based on dibenzo[hi,st]ovalene features remarkable optical-gain properties, thus holding great potential for applications in laser devices.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201700730

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