Electronic properties of Mn-phthalocyanine-C60 bulk heterojunctions: Combining photoemission and electron energy-loss spectroscopy

被引：5

作者：

Roth, Friedrich ^{[1
]}

Herzig, Melanie ^{[2
]}

Lupulescu, Cosmin ^{[3
]}

Darlatt, Erik ^{[4
]}

Gottwald, Alexander ^{[4
]}

Knupfer, Martin ^{[2
]}

Eberhardt, Wolfgang ^{[1
,3
]}

机构：

[1] DESY, Ctr Free Electron Laser Sci, D-22607 Hamburg, Germany

[2] FW Dresden, D-01171 Dresden, Germany

[3] Tech Univ Berlin, Inst Opt & Atom Phys, D-10623 Berlin, Germany

[4] Phys Tech Bundesanstalt, D-10587 Berlin, Germany

来源：

JOURNAL OF APPLIED PHYSICS | 2015年 / 118卷 / 18期

关键词：

LEVEL ALIGNMENT; ORGANIC PHOTOCONDUCTORS; METAL PHTHALOCYANINES; C-60; INTERFACES; DEVICES; SPIN; COMPOSITES; SPECTRA; STATES;

D O I：

10.1063/1.4935623

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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) and 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 the rather small interface interaction, the MnPc related electronic excitation spectrum changes significantly by admixing C-60 to MnPc thin films. (C) 2015 AIP Publishing LLC.

引用

页数：6

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