Waas Daniel, Rückerl Florian, Knupfer Martin, Büchner Bernd
IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany.
Beilstein J Nanotechnol. 2017 Apr 25;8:927-932. doi: 10.3762/bjnano.8.94. eCollection 2017.
We have used photoelectron spectroscopy to determine the energy-level alignment at organic heterojunctions made of manganese phthalocyanine (MnPc) and the fullerene C. We show that this energy-level alignment depends upon the preparation sequence, which is explained by different molecular orientations. Moreover, our results demonstrate that MnPc/C interfaces are hardly suited for application in organic photovoltaic devices, since the energy difference of the two lowest unoccupied molecular orbitals (LUMOs) is rather small.
我们利用光电子能谱来确定由锰酞菁（MnPc）和富勒烯C构成的有机异质结处的能级排列。我们表明，这种能级排列取决于制备顺序，这可以通过不同的分子取向来解释。此外，我们的结果表明，MnPc/C界面不太适合用于有机光伏器件，因为两个最低未占据分子轨道（LUMO）的能量差相当小。
