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OLEDs : = Improved Light Extraction Through Patterned Plastics.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	OLEDs :/
其他題名:	Improved Light Extraction Through Patterned Plastics.
作者:	Dykstra, Erik Mark Richter.
面頁冊數:	1 online resource (122 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-12, Section: B.
Contained By:	Dissertations Abstracts International84-12B.
標題:	Physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30425088click for full text (PQDT)
ISBN:	9798379738464

OLEDs : = Improved Light Extraction Through Patterned Plastics.
Dykstra, Erik Mark Richter.

OLEDs :Improved Light Extraction Through Patterned Plastics. - 1 online resource (122 pages)

Source: Dissertations Abstracts International, Volume: 84-12, Section: B.

Thesis (Ph.D.)--Iowa State University, 2023.

Includes bibliographical references

Light extraction from planar bottom-emitting OLEDs is approximately 20% due to light being waveguided in the substrate and organic layers as well as due to plasmon losses. As the consumer market for OLED lighting continues to grow, high-throughput fabrication of OLEDs that utilize novel light extraction mechanisms continue to lag. Corrugated plastic substrates for OLED fabrication have the potential for roll-to-roll high throughput molding and can be easily molded into various enhancing structures for studying light extraction in OLEDs.In this research, we investigated the effect of various pitch corrugated plastic substrates on device efficiencies. We fabricated OLEDs on substrate pitches of 400nm and 750nm in PC substrates with heights under 200nm. While 400nm pitch substrate performed similar to controls, the 750nm pitch substrates produced a 30% EQE for a green OLED, jumping to 58% when the substrate losses were extracted with index matching fluid. Pitches of 2.8µm and 7.8µm were patterned into PET/CAB substrates and EQEs of >30% were found for blue OLEDs on these substrates.We also studied the effect of high index planarization of various corrugations on device efficiencies. A high index resin with refractive index ~1.85 was used to bury corrugations molded into PMMA substrates. For a green device, we were able to obtain a maximum EQE of 33.5% using 4.25µm pitch pattern buried in a n~1.85 planarizing layer. Similar enhancement was seen for ~15µm pitch buried structure. With planarized extraction structures and an index matching fluid to extract the substrate mode, we achieved a maximal EQE of 60% in a Green OLED and 48.5% for white.Overall we conclude that OLED research on high index planarized corrugations should continue as they offer light extraction while maintaining a planar surface for OLED fabrication.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798379738464Subjects--Topical Terms:

516296
Physics.
Subjects--Index Terms:

OLEDIndex Terms--Genre/Form:

542853
Electronic books.

OLEDs : = Improved Light Extraction Through Patterned Plastics.
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500 $a Source: Dissertations Abstracts International, Volume: 84-12, Section: B.
500 $a Advisor: Shinar, Joseph;Shinar, Ruth.
502 $a Thesis (Ph.D.)--Iowa State University, 2023.
504 $a Includes bibliographical references
520 $a Light extraction from planar bottom-emitting OLEDs is approximately 20% due to light being waveguided in the substrate and organic layers as well as due to plasmon losses. As the consumer market for OLED lighting continues to grow, high-throughput fabrication of OLEDs that utilize novel light extraction mechanisms continue to lag. Corrugated plastic substrates for OLED fabrication have the potential for roll-to-roll high throughput molding and can be easily molded into various enhancing structures for studying light extraction in OLEDs.In this research, we investigated the effect of various pitch corrugated plastic substrates on device efficiencies. We fabricated OLEDs on substrate pitches of 400nm and 750nm in PC substrates with heights under 200nm. While 400nm pitch substrate performed similar to controls, the 750nm pitch substrates produced a 30% EQE for a green OLED, jumping to 58% when the substrate losses were extracted with index matching fluid. Pitches of 2.8µm and 7.8µm were patterned into PET/CAB substrates and EQEs of >30% were found for blue OLEDs on these substrates.We also studied the effect of high index planarization of various corrugations on device efficiencies. A high index resin with refractive index ~1.85 was used to bury corrugations molded into PMMA substrates. For a green device, we were able to obtain a maximum EQE of 33.5% using 4.25µm pitch pattern buried in a n~1.85 planarizing layer. Similar enhancement was seen for ~15µm pitch buried structure. With planarized extraction structures and an index matching fluid to extract the substrate mode, we achieved a maximal EQE of 60% in a Green OLED and 48.5% for white.Overall we conclude that OLED research on high index planarized corrugations should continue as they offer light extraction while maintaining a planar surface for OLED fabrication.
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538 $a Mode of access: World Wide Web
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650 4 $a Electrical engineering. $3 649834
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653 $a Light extraction
653 $a Light
653 $a Device efficiencies
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856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30425088 $z click for full text (PQDT)