oled fabrication
Post on 08-Aug-2018
223 Views
Preview:
TRANSCRIPT
-
8/22/2019 OLED Fabrication
1/18
-
8/22/2019 OLED Fabrication
2/18
OLEDs are light emitting devicesthat have a thin film of organiccompounds as its emissiveelectroluminescent layer.
-
8/22/2019 OLED Fabrication
3/18
Physical Vapor Deposition
Screen Printing
Ink Jet Printing In-line Fabrication
-
8/22/2019 OLED Fabrication
4/18
-
8/22/2019 OLED Fabrication
5/18
-
8/22/2019 OLED Fabrication
6/18
Thermal vapor evaporation of smallmolecules occurs in environment of 10e(-
6) Torr or higher It is usually carried out on glass substrate
Multicolor displays are made using
properly matched shadow masks fordepositing RGB emitting materials
-
8/22/2019 OLED Fabrication
7/18
Thickness can be easily controlled
2-dimensional combinatorial arrays of
OLEDs can be easily fabricated in asingle deposition procedure
PVD uses the generally available
vacuum equipment that exists in thesemiconductor industry
-
8/22/2019 OLED Fabrication
8/18
Expensive
Not flexible
Has no control to direct the materials todeposit on the desired areas
Inefficient use of materials
-
8/22/2019 OLED Fabrication
9/18
Used in low information content displayssuch as logos and signs
Thin films achieved Elements of screen printing: screen,
stencil, squeegee, ink, press bed, and
substrate Mesh materials can vary from polyester
to stainless steel
-
8/22/2019 OLED Fabrication
10/18
1. The mesh material is stretched across a
frame
2. Hole transport layer prepared using asolution of diamine, polycarbonate, and
rubrene.
3. Squeegee is used to wipe solution through
the open mesh4. Resulting film covers entire surface of ITO
5. Electron transport layer (ETL) and cathode
are deposited by PVD
-
8/22/2019 OLED Fabrication
11/18
For patterned hole transport layer (HTL)
devices: cathode is deposited in a block larger
than the HTL pattern For non-patterned HTL: cathode is depositedthrough a mask to create emitting regions of
known area for device output measurement
-
8/22/2019 OLED Fabrication
12/18
Simple
Lower cost
Great reduction in materials usagebecause materials are only directed tothe printed areas
Faster than inkjet printing More versatile
-
8/22/2019 OLED Fabrication
13/18
OLEDs are sprayed onto substrates likeink sprayed on paper during printing
Advantages:- Reduced cost
- Allows OLEDs to be printed on very largefilms
-
8/22/2019 OLED Fabrication
14/18
Ink jet printing to define and pattern RGB emitting subpixels
-
8/22/2019 OLED Fabrication
15/18
Mass production
technique
Vertical in-line tool
operates withcontinuous substrate
flow
Linear sources of
depositing organicand metallic
materials
-
8/22/2019 OLED Fabrication
16/18
Cheaper mass production technique
Excellent thickness homogeneity
Excellent deposition stability Complicated stack structures possible
High deposition rates/high throughput
High material usage Large substrate handling
-
8/22/2019 OLED Fabrication
17/18
-
8/22/2019 OLED Fabrication
18/18
Ghassan E. Jabbour et al., Screen Printing for the Fabrication of OrganicLight-Emitting Devices, IEEE 7:5, 2001
Joseph Shinar, Organic Light-emitting Devices.
http://www.ewh.ieee.org/soc/cpmt/presentations/cpmt0401a.pdf
http://www.opera2015.org/deliverables/MONA_CD-ROM/4_Symposium%20Presentations/04-scholles2752.pdf
Muhamad Mat Salleh, et.al., Fabrication of Organic Light EmittingDiodes.
http://optics.org/cws/article/research/24299
http://www.opera2015.org/deliverables/MONA_CD-ROM/4_Symposium%20Presentations/04-scholles2752.pdfhttp://www.opera2015.org/deliverables/MONA_CD-ROM/4_Symposium%20Presentations/04-scholles2752.pdfhttp://www.opera2015.org/deliverables/MONA_CD-ROM/4_Symposium%20Presentations/04-scholles2752.pdfhttp://www.opera2015.org/deliverables/MONA_CD-ROM/4_Symposium%20Presentations/04-scholles2752.pdfhttp://www.opera2015.org/deliverables/MONA_CD-ROM/4_Symposium%20Presentations/04-scholles2752.pdfhttp://www.opera2015.org/deliverables/MONA_CD-ROM/4_Symposium%20Presentations/04-scholles2752.pdfhttp://www.opera2015.org/deliverables/MONA_CD-ROM/4_Symposium%20Presentations/04-scholles2752.pdfhttp://www.opera2015.org/deliverables/MONA_CD-ROM/4_Symposium%20Presentations/04-scholles2752.pdfhttp://www.opera2015.org/deliverables/MONA_CD-ROM/4_Symposium%20Presentations/04-scholles2752.pdfhttp://www.opera2015.org/deliverables/MONA_CD-ROM/4_Symposium%20Presentations/04-scholles2752.pdfhttp://www.opera2015.org/deliverables/MONA_CD-ROM/4_Symposium%20Presentations/04-scholles2752.pdfhttp://www.opera2015.org/deliverables/MONA_CD-ROM/4_Symposium%20Presentations/04-scholles2752.pdf
top related