Field-Enhancement Effect of Short Carbon Nanotubes Using an Electrical Aging Treatment on Inorganic Electroluminescence

Author

Kim, Jin-Young ; Bae, Min Jong ; Jeong, Taewon ; Park, Shang Hyeun ; Song, Sunjin ; Lee, Jeonghee ; Han, Intaek ; Jung, Donggeun ; Yu, SeGi

Author_Institution

Dept. of Phys., Sungkyunkwan Univ., Suwon, South Korea

Volume

31

Issue

11

fYear

2010

Firstpage

1269

Lastpage

1271

Abstract

AC inorganic electroluminescence (EL) devices were fabricated using the emitting layer composed of phosphor-single-walled carbon nanotubes (SWCNTs) composite (PSC) to utilize the local field enhancement of SWCNTs. In order to enhance the electric field in an emitting layer with minimized current paths, bare long SWCNTs were shortened by cryogenic crushing method. After electrical aging treatment of the PSC device, partly formed short SWCNT networks in the emitting layer were effectively removed during the electrical aging treatment. High performance of 60% and 43% increase in efficiency and luminance, respectively, was achieved. This PSC device with short SWCNTs could lead to high brightness due to increased electron tunneling into phosphor. The PSC device reveals the importance of high electric field by SWCNTs leading to high EL performance.

Keywords

ageing; carbon nanotubes; electroluminescent devices; nanocomposites; phosphors; tunnelling; AC inorganic electroluminescence device; C; cryogenic crushing method; electrical aging treatment; electron tunneling; emitting layer; local field enhancement; phosphor-single-walled carbon nanotube composite; Aging; Brightness; Carbon nanotubes; Materials; Performance evaluation; Phosphors; Powders; Aging treatment; carbon nanotube (CNT); electroluminescence (EL); field-enhancement effect;

fLanguage

English

Journal_Title

Electron Device Letters, IEEE

Publisher

ieee

ISSN

0741-3106

Type

jour

DOI

10.1109/LED.2010.2066544

Filename

5585698