PHOTOINDUCED PHASE TRANSFORMATION IN POLYTHIOPHENE
PHOTOINDUCED PHASE TRANSFORMATION IN POLYTHIOPHENE
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聚噻吩中的光致相变
DOI：
10.1103/physrevlett.82.1672
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发表时间：
1999
影响因子：
8.6
通讯作者：
Y. Tokura
中科院分区：
文献类型：
--
作者：
N. Hosaka;H. Tachibana;N. Shiga;M. Matsumoto;Y. Tokura
在具有区域规则烷基侧基的聚（3-烷基噻吩）薄膜中，观察到光谱上不同的两相之间的热可恢复的光开关。光诱导相变的初级过程在激光脉冲激发（5ns）的持续时间内完成，其中聚合物骨架上光产生的电子-空穴对密度高于临界值，似乎触发了相变的自激活过程。这种电子和/或结构状态的快速光开关也可以应用于许多其他具有光电功能的共轭聚合物。
The thermally restorable photoswitching between the spectroscopically distinct two phases has been observed for thin films of poly (3-alkylthiophene) with regioregular alkyl sidegroups. The primary process of the photoinduced phase transition is completed within a duration of the exciting laser pulse (5 ns), in which photogenerated electron-hole pairs on the polymer backbone with the density above a critical value appear to trigger a self-activated process for the phase conversion. Such a fast photoswitching of the electronic and/or structural state may be applied as well to many other conjugated polymers with optoelectronic functionality.