自组装银膜增强8-羟基喹啉铝(Alq3)光致发光的实验和理论研究

叶松; 王向贤; 侯宜栋; 张志友; 杜惊雷

doi:10.7498/aps.63.087802

摘要

实验和理论研究了不同自组装密度的银纳米颗粒膜对 8-羟基喹啉铝（Alq3）光致发光的影响. 结果表明：Alq3光致发光的表观增强和发射增强因子与银纳米颗粒膜密度呈正相关关系，最大值约为3.2 和13；理论计算表明银纳米颗粒膜对Alq3光致发光的量子效率和发射的最大增强因子约为1.4和15. 对比实验和理论结果，金属纳米颗粒膜的近场场强增强是导致Alq3光致发光发射强度增强的主要因素，且Alq3光致发光效率与Alq3相对银纳米颗粒的分布和热点区域面积覆盖率有关.

关键词:

Abstract

Alq3 photoluminescences (PL) enhanced by self-assembled silver films are investigated experimentally and theoretically. The experimental results show that both the apparent enhancement factor (AEF) and the emission enhancement factor (EEF) of Alq3 PL increase with the increase of density of average 70 nm diameter silver nanoparticles on the substrate. The maxima of AEF and EEF are about 3.2 and 13, respectively. Based on the optical antenna theory, the theoretical maxima of both quantum efficiency enhancement factor and EEF of Alq3 PL are about 1.4 and 15, respectively. By comparing of the experimental results with the theoretical results, we can conclude that the near-field enhancement of silver nanoparticles makes a major contribution to Alq3 PL emission enhancement, and the emission enhancement is dependent on the Alq3-silver nanoparticle distance and the area coverage ratio of silver nanoparticles to substrate.

Keywords:

作者及机构信息

1.
巢湖学院电子工程与电气自动化学院, 合肥 238000;

2.
四川大学物理科学与技术学院, 成都 610064

基金项目: 国家自然科学基金（批准号：11305111）、安徽省高校自然科学基金（批准号：KJ2013B163）、巢湖学院自然科学基金（批准号：XLZ201201）和巢湖学院博士科研启动基金（批准号：2012）资助的课题.

Authors and contacts

1.
Department of Electrical Engineering and Electrical Automation, Chaohu University, Hefei 238000, China;

2.
School of Physical Science and Technology, Sichuan University, Chengdu 610064, China

Funds: Project supported by the National Natural Science Foundation of China (Grant No. 11305111), the Natural Science Foundation of the Higher Education Institutions of Anhui Province, China (Grant No. KJ2013B163), the Natural Science Foundation of Chaohu University, China (Grant No. XLZ201201), and the Starting Foundation of Scientific Research for Doctors of Chaohu University, China (Grant No. 2012).

参考文献

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施引文献

[1]	Reilly T H, van de Lagemaat I J, Tenent R C, Morfa A J, Rowlen K L 2008 Appl. Phys. Lett. 92 243304
[2]	Aslan K, Malyn S N, Zhang Y, Geddes C D 2008 J. Appl. Phys. 103 084307
[3]
[4]	Hutter E, Fendler J H 2004 Adv. Mater. 16 1685
[5]
[6]
[7]	Tong J B, Huang Q, Zhang X D, Zhang C S, Zhao Y 2012 Acta Phys. Sin. 61 047801 (in Chinese) [佟建波, 黄茜, 张晓丹, 张存善, 赵颖 2012 61 047801]
[8]	Ren Y D, Hao S J, Qiu Z Y 2013 Acta Phys. Sin. 62 147302 (in Chinese) [任艳东, 郝淑娟, 邱忠阳 2013 62 147302]
[9]
[10]	Qiu D J, Fan W Z, Weng S, Wu H Z, Wang J 2011 Acta Phys. Sin. 60 087301 (in Chinese) [邱东江, 范文志, 翁圣, 吴惠桢, 王俊 2011 60 087301]
[11]
[12]
[13]	Park H J, Vak D, Noh Y Y, Lim B, Kim D Y 2007 Appl. Phys. Lett. 90 161107
[14]	Cho K H, Ahn S I, Lee S M, Choi C S, Choi K C 2010 Appl. Phys. Lett. 97 193306
[15]
[16]
[17]	Yang K Y, Choi K C, Ahn C W 2009 Appl. Phys. Lett. 94 173301
[18]	Yang K Y, Choi K C, Ahn C W 2009 Opt. Express 17 11495
[19]
[20]
[21]	Fujiki A, Uemura T, Zettsu N, Akai-Kasaya M, Saito A, Kuwahara Y 2010 Appl. Phys. Lett. 96 043307
[22]	Tagaya M, Ogawa M 2008 Phys. Chem. Chem. Phys. 10 6849
[23]
[24]	Dong Y F, Li Q S 2002 Acta Phys. Sin. 51 1645 (in Chinese) [董艳锋, 李清山 2002 51 1645]
[25]
[26]
[27]	Emmanuel F, Samuel G 2008 J. Phys. D: Appl. Phys. 41 013001
[28]	Tanabe K 2008 J. Phys. Chem. C 112 15721
[29]
[30]	Wilson L R, Richards B S 2009 Appl. Opt. 48 212
[31]
[32]	Johnson P B, Christy R W 1972 Phys. Rev. B 6 4370
[33]
[34]
[35]	Bharadwaj P, Beams R, Novotny L 2011 Chem. Sci. 2 136
[36]
[37]	Mattoussi H, Murata H, Merritt C D, Iizumi Y, Kido J, Kafafi Z H 1999 J. Appl. Phys. 86 2642

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