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- In relation to this article, we declare that there is no conflict of interest.
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Received February 13, 2023
Revised April 11, 2023
Accepted May 26, 2023
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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무정제 단일벽 탄소나노튜브와 은나노와이어가 적층으로 코팅된 투명전도성 고분자 필름의 전기 전도성, 광학 투과도 및 산화안정성
Electrical Conductivity, Optical Transmittance, and Oxidation Stability of Transparent Conductive Polymer Film Coated With Layered Pristine Single-walled Carbon Nanotube and Silver Nanowire
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Abstract
탄소나토튜브를 투명 전극에 활용하기 위한 필수요소인 정제과정없이 무정제 단일벽 탄소나노튜브(single-walled
carbon nanotube, SWCNT)와 은나노와이어(silver nanowire) 분산액을 제조하여 폴리에틸렌 테레프탈레이트
(polyethylene terephthalate, PET) 필름에 바 코팅을 이용하여 전기전도성 투명전극을 제조하였다. PET 기판 위에
SWCNT 및 은 나노와이어를 각각 포함하는 코팅층을 상호 교차시켜 적층함으로서 은나노와이어의 전기 전도도와 투
과도를 극대화시키고 헤이즈 (haze)가 증가되는 단점을 극복하기 위해 SWCNT를 도입하였고, 무정제 SWCNT내에 존
재하는 금속 촉매의 산화에 의해서 항온항습 테스트 후 저항이 급격하게 증가하는 문제를 은 나노와이어가 전기적 네
트워크 형성에 기여하여 산화에 대한 안정성을 확보할 수 있었다. SWCNT함량이 0.025 wt% 인 분산액을 PET 기판
에 먼저 코팅하고 그 위에 은 나노와이어의 함량이 0.05 wt%인 분산액을 코팅한 투명전극의 시트 저항은 47 Ω/□, 투
과도는 96.72%, 헤이즈는 1.93% 로 전기적 광학적 특성이 우수하게 나왔고, 산화 안정성 평가를 위한 항온 항습 실험
후 시트 저항의 변화율이 6.4% 로 적게 나타나서 장기적 사용에 적합하다는 것을 알 수 있었다. 무정제 SWCNT 사용
함으로 저비용, 친환경 하이브리드 투명전극을 상업적으로 활용 가능한 수준의 제품이 개발되었다.
An electrically conductive and transparent electrode was created by applying a dispersion of pristine
single-walled carbon nanotubes (SWCNTs) and silver nanowires to a polyethylene terephthalate (PET) film using a bar
coating method. The SWCNTs were added to increase the electrical conductivity and transmittance of the silver
nanowires while also preventing the haze from increasing due to the stacking of multiple layers containing SWCNTs and
silver nanowires on the PET substrate. The silver nanowires in the electrode were also found to be stable against
oxidation. The transparent electrode displayed excellent electrical and optical properties, with a sheet resistance of 47 Ω/□,
transmittance of 96.72%, and haze of 1.93%. Additionally, the sheet resistance of the electrode remained stable over
time, with a change of only 6.4% after a constant temperature and humidity test, making it suitable for long-term use. A
hybrid transparent electrode that is economically feasible and environmentally sustainable has been developed through
the utilization of pristine SWCNT and silver nanowire.
Keywords
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