Mechanical integrity and environmental reliability of a single wall carbon nanotube as a flexible transparent conducting electrode

作者：Eun Kyoungtae^*; Lee Eun Kyung; Lee Mi Kyoung; Kim Kyunnyun; Kim Wonhyo; Shin Kwonwoo; Choa Sung Hoon

来源：Japanese Journal of Applied Physics, 2014, 53(5): 05FD04.

DOI：10.7567/JJAP.53.05FD04

We investigated a single wall carbon nanotube (SWCNT) electrode as a potential flexible transparent conducting electrode. The mechanical integrity of an SWCNT electrode spray-coated onto a polyethylene terephthalate substrate was investigated via outer/inner bending, twisting, stretching, and adhesion tests. In particular, its environmental reliability under high-temperature and high-humidity conditions was characterized. The spray-coated SWCNT electrode showed a sheet resistance of 200 Omega/square and a transparency of 83%. The SWCNT electrode showed a constant resistance change (Delta R/R-0) within an outer and inner bending radius of 2.5 mm. The bending fatigue test showed that the SWCNT electrode can withstand 10,000 bending cycles at a bending radius of 5 mm. Furthermore, the resistance change of the stretched SWCNT electrode was fairly constant up to a strain of 5%, which is quite stable compared with the resistance change of conventional amorphous indium tin oxide electrodes. The SWCNT electrode also showed good adhesion strength. The environmental storage test at a high temperature (85 degrees C) indicated that change in the electrical resistance of the SWCNT electrode is less than 9% after 100 h test. In the environmental reliability tests at 85% relative humidity (RH) and 60 degrees C/90% RH, the Delta R/R-0 of the SWCNT electrode was very small. These results indicate that the SWCNT electrode has good environmental stability.

• 出版日期2014-5