Evidence for the formation of unoccupied states in poly(2,3-diphenylphenylene vinylene) following the deposition of metal

被引：29

作者：

Ettedgui, E

Razafitrimo, H

Gao, Y

Hsieh, BR

Feld, WA

Ruckman, MW

机构：

[1] UNIV ROCHESTER,DEPT PHYS & ASTRON,ROCHESTER,NY 14627

[2] XEROX CORP,WEBSTER CTR RES & TECHNOL,WEBSTER,NY 14580

[3] WRIGHT STATE UNIV,DEPT CHEM,DAYTON,OH 45435

[4] BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.76.299

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Near-edge x-ray-absorption spectroscopy was used to study the interaction of Ca and Al with poly(2,3-diphenylphenylene vinylene) (DP-PPV). Al does not significantly modify the C-K edge during interface formation while Ca does in a coverage dependent fashion. The evolution of the C-K edge points to the creation of new intragap states. In addition, we see a strong resonance at higher photon energies. The creation of new unoccupied states in DP-PPV following the deposition of Ca may in part explain the enhanced charge injection observed when Ca is used as the cathode material in polymer-based light emitting diodes.

引用

页码：299 / 302

页数：4

共 31 条

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