國立虎尾科技大學 |

Open-Air Spray-Plasma Depositon of Moisture Barriers.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Open-Air Spray-Plasma Depositon of Moisture Barriers./
Author:	Pan, Ziyi.
Description:	1 online resource (143 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
Contained By:	Dissertations Abstracts International85-04B.
Subject:	Mechanical properties. -
Online resource:	click for full text (PQDT)
ISBN:	9798380482257

Open-Air Spray-Plasma Depositon of Moisture Barriers.
Pan, Ziyi.

Open-Air Spray-Plasma Depositon of Moisture Barriers. - 1 online resource (143 pages)

Source: Dissertations Abstracts International, Volume: 85-04, Section: B.

Thesis (Ph.D.)--Stanford University, 2023.

Includes bibliographical references

Emerging optoelectronic devices often require moisture barriers to prevent water ingress. While a variety of methods exist to limit moisture ingress including glass/glass encapsulation and multilayer films produced in vacuum environments, they present disadvantages in terms of rigidity, weight, cost and method of application. A rapid, conformal, and low-cost barrier coating method that can be applied in open-air for moisture barrier protection presents an attractive opportunity. A compounding aspect of barrier evaluation is the need for a both accurate and high throughput methodology. Existing calcium film testing and permeation testing methods for evaluating the water vapor transmission rate through moisture barriers while accurate surfer from low-throughput and the need for complex fabrication process or vacuum chambers. In this dissertation, we show the development of different types of moisture barriers via plasma deposition in open-air and demonstrate a rapid testing methodology using infrared imaging to evaluate the moisture barrier efficacy.Firstly, I will demonstrate a spatially resolved imaging methodology for water vapor transmission rate (WVTR) testing that relies on quantified infrared characterization at water absorption bands. This technique is validated using a moisture barrier on a polymer substrate via calibration of the infrared image intensity with moisture content in the polymer substrate from images taken at different times. This method is compared to existing state of the art techniques such as membrane permeation measurement and optical calcium film testing. This fast, nondestructive and in-situ method enables defect visualization and shows the WVTR with a sensitivity limit of 5·10-5 g/m2/day, on par with commercial permeation instrumentation.Secondly, I will describe an open-air spray plasma deposition processing as a highly tunable method to rapidly deposit thin film moisture barriers. A low-cost and commercially available organo-silane precursor with a carbon-bridge, 1,2-bis(triethoxysilyl)-ethane (BTESE), is used here in the open-air spray plasma processing. The whole deposition process is environmentally benign with green solvents and common monomer, and easily applied to large scale deposition. The films are highly transparent, tunable in thickness and mechanical properties, and exhibiting a water vapor transmission rate at about 1.5 g/m2/day under an accelerated aging condition of 38 °C and 90% relative humidity (R.H.), a tenfold increase in moisture barrier efficacy compared to bare polymer substrates. The barrier films are directly applied to perovskite solar devices, which are especially moisture-sensitive, and enable the devices to retain 80% of their initial performance for over 600 hours in ambient conditions, while the control devices decreased to 20% of their performance after 200 hours. Additionally, the barrier films are mechanically robust, exhibiting a threefold increase in adhesion energy and fourfold increase in Young's modulus compared to commercial polysiloxane coatings.Finally, I will present a multilayer moisture barrier design with alternating layers of inorganic SiO2 thin film and conformal organosilicate film to prevent moisture ingress deposited via a scalable, open-air plasma processing. The inorganic layer effectively blocks moisture ingress and the organsilicate layer decouples any pinhole defects in the inorganic layer.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798380482257Subjects--Topical Terms:

1004682
Mechanical properties.
Index Terms--Genre/Form:

554714
Electronic books.

Open-Air Spray-Plasma Depositon of Moisture Barriers.
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500 $a Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
500 $a Advisor: Dauskardt, Reinhold H.
502 $a Thesis (Ph.D.)--Stanford University, 2023.
504 $a Includes bibliographical references
520 $a Emerging optoelectronic devices often require moisture barriers to prevent water ingress. While a variety of methods exist to limit moisture ingress including glass/glass encapsulation and multilayer films produced in vacuum environments, they present disadvantages in terms of rigidity, weight, cost and method of application. A rapid, conformal, and low-cost barrier coating method that can be applied in open-air for moisture barrier protection presents an attractive opportunity. A compounding aspect of barrier evaluation is the need for a both accurate and high throughput methodology. Existing calcium film testing and permeation testing methods for evaluating the water vapor transmission rate through moisture barriers while accurate surfer from low-throughput and the need for complex fabrication process or vacuum chambers. In this dissertation, we show the development of different types of moisture barriers via plasma deposition in open-air and demonstrate a rapid testing methodology using infrared imaging to evaluate the moisture barrier efficacy.Firstly, I will demonstrate a spatially resolved imaging methodology for water vapor transmission rate (WVTR) testing that relies on quantified infrared characterization at water absorption bands. This technique is validated using a moisture barrier on a polymer substrate via calibration of the infrared image intensity with moisture content in the polymer substrate from images taken at different times. This method is compared to existing state of the art techniques such as membrane permeation measurement and optical calcium film testing. This fast, nondestructive and in-situ method enables defect visualization and shows the WVTR with a sensitivity limit of 5·10-5 g/m2/day, on par with commercial permeation instrumentation.Secondly, I will describe an open-air spray plasma deposition processing as a highly tunable method to rapidly deposit thin film moisture barriers. A low-cost and commercially available organo-silane precursor with a carbon-bridge, 1,2-bis(triethoxysilyl)-ethane (BTESE), is used here in the open-air spray plasma processing. The whole deposition process is environmentally benign with green solvents and common monomer, and easily applied to large scale deposition. The films are highly transparent, tunable in thickness and mechanical properties, and exhibiting a water vapor transmission rate at about 1.5 g/m2/day under an accelerated aging condition of 38 °C and 90% relative humidity (R.H.), a tenfold increase in moisture barrier efficacy compared to bare polymer substrates. The barrier films are directly applied to perovskite solar devices, which are especially moisture-sensitive, and enable the devices to retain 80% of their initial performance for over 600 hours in ambient conditions, while the control devices decreased to 20% of their performance after 200 hours. Additionally, the barrier films are mechanically robust, exhibiting a threefold increase in adhesion energy and fourfold increase in Young's modulus compared to commercial polysiloxane coatings.Finally, I will present a multilayer moisture barrier design with alternating layers of inorganic SiO2 thin film and conformal organosilicate film to prevent moisture ingress deposited via a scalable, open-air plasma processing. The inorganic layer effectively blocks moisture ingress and the organsilicate layer decouples any pinhole defects in the inorganic layer.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2024
538 $a Mode of access: World Wide Web
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650 4 $a Humidity. $3 1168172
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650 4 $a Glass. $3 681282
650 4 $a Infrared imaging systems. $3 1474747
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650 4 $a Gas flow. $3 641544
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650 4 $a Silicon nitride. $3 1066990
650 4 $a Carbon. $3 557161
650 4 $a Chemical vapor deposition. $3 903407
650 4 $a Emission standards. $3 1372608
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