A Molybdenum Dithiolene Complex as p-Dopant for Hole-Transport Materials: A Multitechnique Experimental and Theoretical Investigation

被引：61

作者：

Qi, Yabing ^{[1
]}

Sajoto, Tissa ^{[2
,3
]}

Kroeger, Michael ^{[1
]}

Kandabarow, Alexander M. ^{[1
]}

Park, Wonjun ^{[1
]}

Barlow, Stephen ^{[2
,3
]}

Kim, Eung-Gun ^{[2
,3
]}

Wielunski, Leszek ^{[4
,5
]}

Feldman, L. C. ^{[4
,5
]}

Bartynski, Robert A. ^{[4
,5
]}

Bredas, Jean-Luc ^{[2
,3
]}

Marder, Seth R. ^{[2
,3
]}

Kahn, Antoine ^{[1
]}

机构：

[1] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

[2] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA

[3] Georgia Inst Technol, Ctr Organ Elect & Photon, Atlanta, GA 30332 USA

[4] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[5] Rutgers State Univ, Inst Adv Mat Devices & Nanotechnol, Piscataway, NJ 08854 USA

来源：

CHEMISTRY OF MATERIALS | 2010年 / 22卷 / 02期

关键词：

ORGANIC MOLECULAR SEMICONDUCTOR; ELECTRONIC-STRUCTURE; METAL-COMPLEXES; SPECTROSCOPY; INJECTION; DIODES; IMPACT; ENERGY; CHARGE; FILMS;

D O I：

10.1021/cm9031623

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Molybdenum tris-[1,2-bis(trifluromethyl)ethane-1,2-dithiolene] (Mo(tfd)(3)) is investigated its it P-dopant For organic semiconductor . With all electron affinity of 5.6 eV, Mo(tfd)(3) is a strong oxidizing agent suitable for the oxidation of several hole transport materials (HTMs). Ultraviolet photoemission spectroscopy confirms p-doping of the standard HTM N,N'-di-[(1-napthyl)-N,N'-diphenyl]-1,1'-biphenyl-4,4'-diamine (alpha-NPD). Strong enhancement of hole injection ill alpha-NPD/Au interfaces is achieved via doping-induced formation of it narrow depletion region in the organic semiconductor. Variable-temperature current-voltage measurements on alpha-NPD: Mo(tfd)(3) (0-3.8 mol%) yield an activation energy for polaron transport that decreases with increasing doping concentration, which is consistent with the effect Of the doping-induced filling of traps oil hopping transport. Good stability of Mo(tfd)(3) Versus diffusion in the alpha-NPD host matrix is demonstrated by Rutherford backscattering for temperatures up to 110 degrees C. Density functional theory (DFT) calculations arc performed to obtain in geometries and electronic structures of isolated neutral and anionic MO(tfd)(3) molecules.

引用

页码：524 / 531

页数：8

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