CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Prev
Next
|
|
|
Effect of NaCl doped into Bphen layer on the performance of tandem organic light-emitting diodes |
Xiao Zhi-Hui (肖志慧)a b c, Wu Xiao-Ming (吴晓明)a b c, Hua Yu-Lin (华玉林)a b c, Bi Wen-Tao (毕文涛)a b c, Wang Li (王丽)a b c, Zhang Xin (张欣)a b c, Xin Li-Wen (辛利文)a b c, Yin Shou-Gen (印寿根)a b c |
a School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China; b Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, Tianjin 300384, China; c Tianjin Key Laboratory of Photoelectric Materials and Devices, Tianjin 300384, China |
|
|
Abstract To improve the performance of tandem organic light-emitting diodes (OLEDs), we study the novel NaCl as n-type dopant in Bphen:NaCl layer. By analyzing their relevant energy levels and carrier transporting characteristics, we discuss the mechanisms of the effective charge generation layer (CGL) of Bphen:NaCl (6 wt%)/MoO3. In addition, we use the Bphen:NaCl (20 wt%) layer as the electron injection layer (EIL) combining the CGL to further improve the performance of tandem device. For this tandem device, the maximal current efficiency of 9.32 cd/A and the maximal power efficiency of 1.93 lm/W are obtained, which are enhanced approximately by 2.1 and 1.1 times compared with those of the single-emissive-unit device respectively. We attribute this improvement to the increase of electron injection ability by introducing of Bphen:NaCl layer. Moreover, the CGL is almost completely transparent in the visible light region, which is also important to achieve an efficient tandem OLEDs.
|
Received: 26 December 2013
Revised: 13 February 2014
Accepted manuscript online:
|
PACS:
|
78.60.Fi
|
(Electroluminescence)
|
|
73.40.-c
|
(Electronic transport in interface structures)
|
|
73.50.Gr
|
(Charge carriers: generation, recombination, lifetime, trapping, mean free paths)
|
|
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 60906022), the Natural Science Foundation of Tianjin, China (Grant No. 10JCYBJC01100), the Scientific Developing Foundation of Tianjin Education Commission, China (Grant No. 2011ZD02), and the Key Science and Technology Support Program of Tianjin, China (Grant No. 14ZCZDGX00006). |
Corresponding Authors:
Wu Xiao-Ming, Hua Yu-Lin
E-mail: wxm@mail.nankai.edu.cn;yulinhua@tjut.edu.cn
|
Cite this article:
Xiao Zhi-Hui (肖志慧), Wu Xiao-Ming (吴晓明), Hua Yu-Lin (华玉林), Bi Wen-Tao (毕文涛), Wang Li (王丽), Zhang Xin (张欣), Xin Li-Wen (辛利文), Yin Shou-Gen (印寿根) Effect of NaCl doped into Bphen layer on the performance of tandem organic light-emitting diodes 2014 Chin. Phys. B 23 087811
|
[1] |
Kanno H, Holmes R J, Sun Y, Cohen S K and Forrest S R 2006 Adv. Mater. 18 399
|
[2] |
Chen C W, Lu Y J, Wu C C, Wu E H E, Chu C W and Yang Y 2005 Appl. Phys. Lett. 87 241121
|
[3] |
Guo F G and Ma D G 2005 Appl. Phys. Lett. 87 173510
|
[4] |
Lu F P, Wang Q and Zhou X 2013 Chin. Phys. B 22 037202
|
[5] |
Zhang Y F, Zhao S L and Xu Z 2013 Chin. Phys. Lett. 30 057801
|
[6] |
Liao L S and Klubek K P 2008 Appl. Phys. Lett. 92 223311
|
[7] |
Law C W, Lau K M, Fung M K, Chan M Y, Wong F L, Lee C S and Lee S T 2006 Appl. Phys. Lett. 89 133511
|
[8] |
Sun J X, Zhu X L, Peng H J, Wong M and Kwok H S 2007 Org. Electron. 8 305
|
[9] |
Qi X F, Li N and Forrest S R 2010 J. Appl. Phys. 107 014514
|
[10] |
Meyer J, Kröger M, Hamwi S, Gnam F, Riedl T, Kowalsky W and Kahn A 2010 Appl. Phys. Lett. 96 193302
|
[11] |
Yook K S, Jeon S O, Min S Y, Lee J Y, Yang H J, Noh T Y, Kang S K and Lee T W 2010 Adv. Funct. Mater. 20 1797
|
[12] |
Leem D S, Lee J H, Kim J J and Kang J W 2008 Appl. Phys. Lett. 93 103304
|
[13] |
Liu J S, Chen Y H, Qin D S, Cheng C R, Quan W, Chen L and Li G F 2011 Semicond. Sci. Tcehnol. 26 095011
|
[14] |
Bao Q Y, Yang J P, Li Y Q and Tang J X 2010 Appl. Phys. Lett. 97 063303
|
[15] |
Ho M H, Chen T M, Yeh P C, Hwang S W and Chen C H 2007 Appl. Phys. Lett. 91 233507
|
No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
Altmetric
|
blogs
Facebook pages
Wikipedia page
Google+ users
|
Online attention
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
View more on Altmetrics
|
|
|