Origin of broad visible emission from branched polysilane and polygermane chains

被引：10

作者：

Watanabe, A ^{[1
]}

Sato, T ^{[1
]}

Matsuda, M ^{[1
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2001年 / 40卷 / 11期

关键词：

branched polysilane; branched polygermane; organosilicon cluster; organogermanium cluster; emission; excited state;

D O I：

10.1143/JJAP.40.6457

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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.

引用

页码：6457 / 6463

页数：7

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