Control of Effective Conjugation Length in Polyfluorene Thin Films
Control of Effective Conjugation Length in Polyfluorene Thin Films
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DOI：
10.1143/jjap.45.l247
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发表时间：
2006-02
影响因子：
1.5
通讯作者：
K. Asada;Takashi Kobayashi;H. Naito
中科院分区：
文献类型：
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作者：
K. Asada;Takashi Kobayashi;H. Naito
本文系统地研究了采用旋涂法和滴注法制备的聚芴薄膜及其热处理后的光致发光特性。根据制造条件，聚芴薄膜的发射光子能量从2.81到2.92 eV变化，并且这些薄膜显示，随着PL光谱红移，PL量子效率增加，并且PL光谱中的边带被抑制。这些变化是由跃迁偶极矩的增强和电子-声子相互作用的减少引起的，并且可以仅仅用有效共轭的发展来解释。
The photoluminescence (PL) properties of polyfluorene thin films prepared by the spin-coating or drop-casting methods and subsequent thermal treatment have been systematically investigated. Depending on the fabrication conditions, the emission photon energy of polyfluorene thin films varies from 2.81 to 2.92 eV, and these thin films show that, as PL spectrum redshifts, PL quantum efficiency increases and sidebands in the PL spectrum are suppressed. The changes are caused by the enhancement in transition dipole moment and the reduction in electron–phonon interaction, and that the results can be explained solely by the development of effective conjugation.