Jpn. J. Appl. Phys. 40 (2001) pp. 6457-6463  |Next Article|  |Table of Contents|
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Origin of Broad Visible Emission from Branched Polysilane and Polygermane Chains

Akira Watanabe, Takaaki Sato and Minoru Matsuda

(Received July 3, 2001; accepted for publication August 10, 2001)

The emission properties of branched polysilane and polygermane are studied using time-resolved emission spectroscopy. As branched polymers, the organosilicon cluster (OSI) and organogermanium cluster (OGE) are investigated, which are prepared from tetrachlorosilane and tetrachlorogermane, respectively, and have a hyperbranched structure. The broad visible emissions of OSI and OGE are explained by the energy diagram based on a configuration coordinate model, and the excited states are attributed to a localized state around the branching point. The molecular orbital (MO) calculation suggested the formation of a localized state by the distortion around the branching point in the excited state. The potential barrier for the nonradiative relaxation process was determined from the temperature dependence of the emission lifetime.

URL: http://jjap.jsap.jp/link?JJAP/40/6457/
DOI: 10.1143/JJAP.40.6457

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