Work Function Engineering of Graphene Electrode via Chemical Doping

被引：482

作者：

Shi, Yumeng ^{[2
,3
]}

Kim, Ki Kang ^{[3
]}

Reina, Alfonso ^{[4
]}

Hofmann, Mario ^{[3
]}

Li, Lain-Jong ^{[1
]}

Kong, Jing ^{[3
]}

机构：

[1] Acad Sinica, Res Ctr Appl Sci, Taipei 11529, Taiwan

[2] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

[3] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

[4] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

ACS NANO | 2010年 / 4卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

surface analysis; graphene; doping; photovoltaic devices; FEW-LAYER GRAPHENE; SOLAR-CELLS; CARBON NANOTUBES; LARGE-AREA; EPITAXIAL GRAPHENE; ELASTIC PROPERTIES; THIN-FILMS; SINGLE; DEVICES; MOLECULES;

D O I：

10.1021/nn1005478

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this work, we demonstrate that graphene films synthesized by chemical vapor deposition (CVD) method can be used as thin transparent electrodes with tunable work function. By immersing the CVD-grown graphene films into AuCl3 solution, Au particles were formed on the surface of graphene films by spontaneous reduction of metal ions. The surface potential of graphene films can be adjusted (by up to similar to 0.5 eV) by controlling the immersion time. Photovoltaic devices based on n-type silicon interfacing with graphene films were fabricated to demonstrate the benefit of an electrode with tunable work function. The maximum power conversion efficiency (PCE) achieved was similar to 0.08%, which is more than 40 times larger than the devices without chemical doping.

引用

页码：2689 / 2694

页数：6

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