Electronic properties of Mn-Phthalocyanine - C${}_{60}$ bulk heterojunctions: combining photoemission and electron energy-loss spectroscopy

Abstract

The electronic properties of co-evaporated mixtures (blends) of manganese phthalocyanine and the fullerene C${}_{60}$ (MnPc:C${}_{60}$) have been studied as a function of the concentration of the two constituents using two supplementary electron spectroscopic methods, photoemission spectroscopy (PES) as well as electron energy-loss spectroscopy (EELS) in transmission. Our PES measurements provide a detailed picture of the electronic structure measured with different excitation energies as well as different mixing ratios between MnPc and C${}_{60}$. Besides a relative energy shift, the occupied electronic states of the two materials remain essentially unchanged. The observed energy level alignment is different compared to that of the related CuPc:C${}_{60}$ bulk heterojunction. Moreover, the results from our EELS investigations show that despite of the rather small interface interaction the MnPc related electronic excitation spectrum changes significantly by admixing C${}_{60}$ to MnPc thin films.

References in corpus (3)

• Electron Energy-Loss Spectroscopy: A versatile tool for the investigations of plasmonic excitations
• Ab initio correlation effects on the electronic and transport properties of metal(II)-phthalocyanine based devices
• Electronic properties and morphology of Cu-Phthalocyanine - C${}_{60}$ composite mixtures

Cited by in corpus (1)

• Transverse resonance island buckets for synchrotron-radiation based electron time-of-flight spectroscopy