Thermal Analysis and Design of Electronic Systems

Bar‐Cohen, Avram; Geisler, Karl J. L.; Kraus, Allan D.

doi:10.1002/047134608x.w2112

Cited by 5 publications

(9 citation statements)

References 25 publications

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“…Due to the limiting conductivity of transparent electrodes and/or high current injection during operation, Joule heating occurs inevitably in transparent OLED displays and lighting [5][6][7]. It brings in a deterioration of device performance and stability [8,9]. Since heat generated inside organic layers is transferred through the cover glass, a scheme for heat sink with the cover glass is essential.…”

Section: Introductionmentioning

confidence: 99%

“…Heat is governed by thermal conduction, convection, and radiation [9]. For some devices, heat transfer in the vertical direction would be important, which is determined by the through-plane thermal conductivity of heat sinks.…”

Section: Introductionmentioning

confidence: 99%

“…For transparent OLEDs, however, heat transfer in the horizontal direction is also important for uniform heat distribution, which is determined by the in-plane thermal conductivity of heat sinks. Meanwhile, the thermal radiation plays an important role in heat dissipation at high temperatures [9], which is determined by the thermal emissivity of heat sinks. Therefore, a heat sink material featuring high thermal conductivity and emissivity is highly demanded.…”

Section: Introductionmentioning

confidence: 99%

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Heat dissipation property of cover glasses with heat sink films for transparent organic light-emitting diodes

Park¹,

Lee²

2014

Semicond. Sci. Technol.

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We investigate the thermal property of cover glasses with heat sink films and provide useful design guidelines of heat sinks for transparent organic light-emitting diodes (OLEDs). To this end, we inquire into the thermal effect of the thickness of cover glasses, Cu sheet or Cu strip lines attached to cover glasses, transparent metal meshes and polymer composite films fabricated on cover glasses, and their position (i.e., inner or outer surface of the cover glass). It is found that the heat sink property varies depending sensitively on the heat sink position and cover glass thickness. To enhance the heat transfer (sink) property, it is preferred to attach the heat sink to the inner surface of the cover glass without any air involved. If no heat sink is used, then thicker cover glasses are required to dissipate the Joule heat effectively. With high-transparency (>80%) metal meshes, we have achieved about 7% heat dissipation. The polymer composite films (poly (methyl methacrylate) (PMMA) binder mixed with cubic-boron nitride (c-BN) filler) show poor heat sink property due to difficulty in establishing an enough heat transfer pathway using a small amount of fillers.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Heat dissipation property of cover glasses with heat sink films for transparent organic light-emitting diodes

Park¹,

Lee²

2014

Semicond. Sci. Technol.

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“…Thermal degradation is a key issue in electronic devices because it gives rise to a deterioration of device performance and stability [1,2]. In particular, Joule heating appears more in transparent electronic devices including transparent displays and lightings due to the limiting conductivity of transparent electrodes and/or high current injection during operation [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…In particular, Joule heating appears more in transparent electronic devices including transparent displays and lightings due to the limiting conductivity of transparent electrodes and/or high current injection during operation [3][4][5]. It is well known that heat is governed by thermal conduction, convection, and radiation [2]. Usually, heat transfer in the vertical direction is dominated by thermal conduction.…”

Section: Introductionmentioning

confidence: 99%

Thermal property of transparent silver nanowire films

Park

Shin

Ahn

et al. 2013

Semicond. Sci. Technol.

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Through a comparison with transparent polymer composite films, we investigate the thermal property of transparent silver nanowire (AgNW) films that may be employed for heat sink in transparent electronic devices. To fabricate transparent polymer composite films and enhance their thermal property, poly(methyl methacrylate) (PMMA) solution featuring high transparency (∼90%) and thermal emissivity (0.9) is mixed with thermal conductive fillers such as aluminum nitride (AlN) and silicon carbide (SiC). It is observed that the thermal emissivity of the AgNW films is decreased as the sheet resistance is reduced. However, we have found that the AgNW film shows the most excellent heat dissipation property (53.7 • C) while maintaining relatively higher transparency (77.1% at 520 nm), followed by the PMMA:SiC and then PMMA:AlN films.

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Improvement of Extracted Power of Pole Mounted Solar Panels by Effective Cooling Using Aluminum Heat Sink under Hot Weather and Variable Wind Speed Conditions

et al. 2020

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The increase in operating temperature of PV generators leads to degradation of their performance. These adverse effects of high temperatures are considered as one of the most important problems that solar panel operation faces in hot weather areas. A lot of research has been undertaken to study this aspect and find ways of limiting the harm caused by such high temperatures. To overcome this harm and to maintain the operating temperature of the PV cells within the optimum range specified by manufacturers, cooling the solar panels often becomes indispensable. This paper discusses the heat transfer through the solar panel layers and studies the effect of high temperature on the solar panel performance in a hot desert environment. It also presents the development of a new solar panel structure viz. by installing an aluminum heat sink to reduce the effect of temperature rise and thus improve the solar panel performance. The study focuses on a pole-mounted solar panel for a street lighting apparatus in extremely hot desert conditions with fluctuating wind speeds. It will be shown that adding an aluminum heat sink to the solar panel bottom mitigates the effect of increased temperature and hence modifies the solar panel operating point by increasing both the efficiency and the lifetime. The solar cell temperature is decreased by 16.4% as a result of the aluminum heat sink installation on the solar panel back sheet and consequently, the accumulated energy produced by the the solar panel is increased by 13.23% per day.

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Thermal Analysis and Design of Electronic Systems

Abstract: The sections in this article are Trends and Needs in Thermal Management Thermal Modeling Thermal Resistance Networks Advanced Topics

Cited by 5 publications

References 25 publications

Heat dissipation property of cover glasses with heat sink films for transparent organic light-emitting diodes

Heat dissipation property of cover glasses with heat sink films for transparent organic light-emitting diodes

Thermal property of transparent silver nanowire films

Improvement of Extracted Power of Pole Mounted Solar Panels by Effective Cooling Using Aluminum Heat Sink under Hot Weather and Variable Wind Speed Conditions

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