• 제목/요약/키워드: Transparent Film Heater

검색결과 26건 처리시간 0.026초

SWNT 투명박막히터의 열성능 평가를 위한 자유대류 열전달 해석 (A COMPUTATIONAL STUDY ON FREE CONVECTION FOR THERMAL PERFORMANCE EVALUATION OF A SWNT THIN-FILM HEATER)

  • 곽호상;이성은;박경석;김경진
    • 한국전산유체공학회:학술대회논문집
    • /
    • 한국전산유체공학회 2009년 춘계학술대회논문집
    • /
    • pp.315-320
    • /
    • 2009
  • A computational investigation is conducted on free convection from a thin plate having a surface heat source. The thermal configuration simulates the recently-proposed transparent film heater made of a single-walled carbon nanotube film on a glass substrate. The Navier-Stokes computations are carried out to study laminar free convection from the heater. Parallel numerical experiments are performed by using a simplified design analysis model which solve the conduction equation with the boundary conditions utilizing several existing correlations for convective heat transfer coefficient. Comparison leads to the most suitable boundary condition for the thermal model to evaluate the performance evaluation of a transparent thin-film heater.

  • PDF

ZnO를 이용한 은 나노와이어 히터의 열 안정성 향상 (Improved Thermal Stability of Ag Nanowire Heaters with ZnO Layer)

  • 최원정;조성진
    • 한국전기전자재료학회논문지
    • /
    • 제30권8호
    • /
    • pp.530-534
    • /
    • 2017
  • Transparent film heaters employing silver nanowires (Ag NWs) have attracted increasing attention because of their widespread applications. However, the low thermal resistance of Ag NWs limits the maximum operating temperature of the Ag NW film heater. In this study, Ag NW film heaters with high mechanical and thermal stability were successfully developed. The thermal power-out characteristics of the Ag NW heaters were investigated as a function of the Ag NW density. The results revealed that the prepared flexible Ag NW heater possessed high thermal stability over $190^{\circ}C$ owing to ZnO encapsulation. This indicates that the Ag NW film with excellent thermal stability have remarkably high potential for use as electrodes in film heaters operating at high temperatures.

Carbon nanotube transparent conductive film: current status and prospect

  • Han, Chang-Soo;Oh, Sang-Keun
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
    • /
    • pp.474-475
    • /
    • 2009
  • As a substitute of ITO material, carbon nanotube (CNT) is widely studied for transparent conductive film (TCF). Current sheet resistance of CNT-TCF is about 100 ${\Omega}$/sq at 80% transmittance. But CNT-TCF performance in manufacturable level is about 500 ${\Omega}$/sq at 83% based on the Topnanosys Co's result. Therefore, critical issue in CNT-TCF research is to reduce the sheet resistance with manufacturing reliability. In this report, recent developments using CNT-TCF are introduced. Touch panel, transparent LED signboard, transparent speaker and transparent heater are representative examples. Also I describe the future issues and prospect of CNT-TCF for the flexible display.

  • PDF

반응성 스퍼트링에 의한 ITO의 형성과 유전체 소성공정중의 특성변화에 관한 연구 (The Effect of Dielectric Firing Process in PDP on the Properties of ITO Prepared by Reactive RF Sputtering)

  • 남상옥;지성원;손제봉;조정수;박정후
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 1997년도 추계학술대회 논문집
    • /
    • pp.510-514
    • /
    • 1997
  • The thin film that is electrically conductive and optically transparent is called conductive transparent thin film. ITO(Indium-Tin Oxide) which is a kind of conductive transparent thin film has been widely used in solar cell, transparent electrical heater, selective optical filter, FDP(Flat Display Panel) such as LCD(Liquid Crystal Display), PDP(Plasma Display Panel) and so on. Especially in PDP, ITO films is used as a transparent electrode in order to maintain discharge and decrease consumption power through the improvement of cell structure. In this study, we prepared ITO by reactive r.f. sputtering with indium-tin(Sn 10wt%) alloy target instead of indium-tin oxide target. The ITO films deposited at low temperature 15$0^{\circ}C$ and 8% $O_2$. Partial pressure showed about 3.6 Ω/$\square$. At the end of firing, the resistance of ITO was decreased, the optical transparence was improved above 90%.

  • PDF

RTA 후속 열처리에 따른 ZnO/Cu/ZnO 박막의 투명전극 및 발열체 특성 연구 (Effect of Rapid Thermal Annealing on the Transparent Conduction and Heater Property of ZnO/Cu/ZnO Thin Films)

  • 이연학;김대일
    • 열처리공학회지
    • /
    • 제36권3호
    • /
    • pp.115-120
    • /
    • 2023
  • ZnO/Cu/ZnO (ZCZ) thin film deposited on the glass substrate with DC and RF magnetron sputtering was rapid thermal annealed (RTA) and then effect of thermal temperature on the opto-electical and transparent heater properties of the films were considered. The visible transmittance and electrical resistivity are depends on the annealing temperature. The electrical resistivity decreased from 1.68 × 10-3 Ωcm to 1.18 × 10-3 Ωcm and the films annealed at 400℃ show a higher transmittance of 78.5%. In a heat radiation test, when a bias voltage of 20 V is applied to the ZCZ film annealed at 400℃, its steady state temperature is about 70.7℃. In a repetition test, the steady state temperature is reached within 15s for all of the bias voltages.

Carbon Nanotube Heater Generating High Heat Flux

  • Kang, Yong-Pil;Lee, Hyun-Chang;Kim, Duck-Jong
    • 한국진공학회:학술대회논문집
    • /
    • 한국진공학회 2012년도 제42회 동계 정기 학술대회 초록집
    • /
    • pp.530-530
    • /
    • 2012
  • Many practical applications of carbon nanotubes(CNTs) have been proposed and there have been attempts to utilize CNT films as transparent electrodes for solar cells and displays. Our group has considered the use of the CNT film as a thin film heater (TFH) and proposed it for the first time and reported the thermal behavior of the TFH made of single walled CNTs. However, due to the relatively high electrical resistance of the CNT film, using the TFH in application areas requiring high heat flux has been a difficult problem. To overcome this obstacle, we adopted a 'branch electrodes' concept to increase the film conductance dramatically. If two branch electrodes are inserted into a TFH whose original electrical resistance is R, the total resistance will be reduced to R/9. Because of the increased aspect ratio, the resistance of each segmented TFH will be reduced to R/3. Furthermore, since they are connected in parallel, the total resistance reduces to R/9. This could be extended to n branch electrodes, and the total resistance of the film will be reduced to R/(n+1)2, if the resistance of electrodes are negligibly small. We fabricated the heaters with different number of branch electrodes. The number of branch electrodes of the fabricated heaters are 0, 2, 4, 8 and their electrical resistance are 101.4, 39.5, 20.0, $15.4{\Omega}$, respectively. We applied 20V to each heater and monitored the temperature variations. We could achieve high heating temperature even with low voltage supply. This technique could be applied to relevant industrial applications which need high power film heater.

  • PDF

금속층 두께에 따른 ITO/Ag/ITO 다층 투명 전극의 발열 특성 연구 (A Study on the Exothermic Properties of ITO/Ag/ITO Multilayer Transparent Electrode Depending on Metal Layer Thickness)

  • 민혜진;강예지나;손혜원;신소현;황민호;이현용
    • 한국전기전자재료학회논문지
    • /
    • 제35권1호
    • /
    • pp.37-43
    • /
    • 2022
  • In this study, we investigated the optical, electrical and exothermic characteristics of ITO/Ag/ITO multilayer structures prepared with various Ag thicknesses on quartz and PI substrates. The transparent conducting properties of the ITO/Ag/ITO multilayer films depended on the thickness of the mid-layer metal film. The ITO/Ag (14 nm)/ITO showed the highest Haccke's figure of merit (FOM) of approximately 19.3×10-3 Ω-1. In addition, the exothermic property depended on the substrate. For an applied voltage of 3.7 V, the ITO/Ag (14 nm)/ITO multilayers on quartz and PI substrates were heated up to 110℃ and 200℃, respectively. The bending tests demonstrated a comparable flexibility of the ITO/Ag/IT multilayer to other transparent electrodes, indicating the potential of ITO/Ag/ITO multilayer as a flexible transparent conducting heater.

반응성 스퍼트링으로 형성된 ITO의 유전채 소성에 따른 특성변화 (The Property Change of ITO Prepared by Reactive R.F. Sputtering in POP manufacturing Process)

  • 남상옥;지성원;손제봉;허근도;조정수;박정후
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1997년도 하계학술대회 논문집 C
    • /
    • pp.1411-1413
    • /
    • 1997
  • The thin film that is electrically conductive and optically transparent is called conductive transparent thin film. ITO(Indium-Tin Oxide) which is a kind of conductive transparent thin film has been widely used in solar cell, transparent electrical heater, selective optical filter, FDP(Flat Display Panel) such as LCD (Liquid Crystal Display), PDP(Plasma Display Panel) and so on. Especially in PDP, ITO films is used as a transparent electrode in order to maintain discharge and decrease consumption power through the improvement of cell structure. In this study, we prepared ITO by reactive r.f. sputtering with indium-tin(Sn wt 10%) alloy target instead of indium-tin oxide target. The ITO films deposited at low temperature $150^{\circ}C$ and 8% $O_2$ partial pressure showed about $3.6{\Omega}/{\square}$. At the end of firing, the resistance of ITO was decreased, the optical transparence was improved above 90%.

  • PDF

레이저 기반 플라즈모닉 어닐링을 통한 은 나노입자 자가 생성 및 소결 공정과 이를 활용한 메탈메쉬 전극 기반 투명 웨어러블 히터 (Ag Nanoparticle Self-Generation and Agglomeration via Laser-Induced Plasmonic Annealing for Metal Mesh-Based Transparent Wearable Heater)

  • 황윤식;남의연;김연욱;우유미;허재찬;박정환
    • 한국전기전자재료학회논문지
    • /
    • 제35권5호
    • /
    • pp.439-444
    • /
    • 2022
  • Laser-induced plasmonic sintering of metal nanoparticles (NPs) is a promising technology to fabricate flexible conducting electrodes, since it provides instantaneous, simple, and scalable manufacturing strategies without requiring costly facilities and complex processes. However, the metal NPs are quite expensive because complicated synthesis procedures are needed to achieve long-term reliability with regard to chemical deterioration and NP aggregation. Herein, we report laser-induced Ag NP self-generation and sequential sintering process based on low-cost Ag organometallic material for demonstrating high-quality microelectrodes. Upon the irradiation of laser with 532 nm wavelength, pre-baked Ag organometallic film coated on a transparent polyimide substrate was transformed into a high-performance Ag conductor (resistivity of 2.2 × 10-4 Ω·cm). To verify the practical usefulness of the technology, we successfully demonstrated a wearable transparent heater by using Ag-mesh transparent electrodes, which exhibited a high transmittance of 80% and low sheet resistance of 7 Ω/square.