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引起了人们的极大关注。基于载流子注入时半导体/电介质界面有机分子的结构变化来揭示载流子注入和输运的机理是非常重要的。在本研究中，利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引起的吸光度差。所获得的光谱与先前研究中获得的光谱不同。

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.