Enhancement of molecular vibrational spectra from semiconductor/dielectric interfaces in organic electronic devices using surface electromagnetic waves

有机场效应晶体管（ofet）作为一种新型的电子器件受到了广泛的关注。揭示载流子注入后ofet中半导体/介电界面有机分子结构变化的载流子注入和输运机理具有重要意义。本研究采用电荷调制光谱的方法获得了rubrene单晶器件中载流子的吸收光谱，该方法选择性地给出了栅极电压施加引起的吸光度差异。得到的光谱与以往的研究结果有所不同。

Organic field effect transistors (OFETs) attract great attention as new-type electronic devices. It is important to reveal the mechanism of carrier injection and transport based on the structural change of the organic molecules at the semiconductor/dielectric interfaces in OFETs upon carrier injection. In this study, absorption spectra from the carriers in rubrene single-crystal devices were obtained by the method of charge modulation spectroscopy, which selectively gives absorbance difference caused by application of the gate voltage. The obtained spectra were different from that obtained in a previous study.