material advances for transparent oleds · material advances for transparent oleds. what we do ......

Michael G. Helander, PhDPresident & CEO

+1 (647) 479-4074 x103michael.helander@otilumionics.comwww.otilumionics.com

03/07/2019 OTI Lumionics Inc. © 2019 ‐ Presented at 2019 OLED Korea Conference 1

Material Advances for Transparent OLEDs

What we do

OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 201903/07/2019 2

Advanced Materials by Design

OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 201903/07/2019 3

Developing New Materials is Really HardOne set of properties can map to many different potential structures

• Melting Point• Light Absorption• Crystal Structure• Etc.

PropertyStructureMaterials Science(well understood with theory)

Materials Discovery(hard to predict; one-to-many)

QPU (Quantum Computer)

Integrated Materials Discovery Platform

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Quantum simulation + AI/ML + production validation

CPU GPU

• Vapor pressure• Optical constants• Electronic structure• Film forming • Crystallinity• Etc.

Properties Structure

Production Testing

Production Testing of Candidate Materials

OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 201903/07/2019 5

• 6,000 sqft facility in Toronto, Canada

Facility supported by:

Real World testing closes the loop on software platform

Example: Aerelight for Print™Flexible OLED module for print + packaging

Materials Discovery

OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 201903/07/2019 6

New Market Opportunities for Transparent OLEDs

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Enabling new product categories and applications for OLED displays

1. Large area transparent panel for advertising

2. Medium area transparent panel for AR + Auto

3. Mobile transparent panel for under display sensor

Market Demand for Transparent OLEDs

03/07/2019 OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 2019 8

Major OEMs looking for solution with high transparency

Leading consumer electronic brands seeking very high transparency OLED displays

AutomotiveAugmented Reality Smart Home Smart Speaker

Large Area Transparent Panel for Advertising

03/07/2019 OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 2019 9

Transparent signage and windows display for retail

Transparent OLED Signage production in 2019, but transparency is still poor (~45%)

Source: Technavio

Global Transparent Digital Signage Market

Medium Area Transparent Panel for AR + Auto

03/07/2019 OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 2019 10

Augmented reality display for automotive and knowledge worker

Source: IHS

Automotive brands want transparent OLEDs for HUD, but transparency is too low (~45%)

Mobile Transparent Panel for Under Display Sensor

03/07/2019 OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 2019 11

Enable IR, camera and other sensors behind active are of display panel

Transparent OLED + Under Display Sensor

Cover glassPOL

TFE/ On TFE touch OLED

Colorless PI

Under display sensor requires high transparency (including in the NIR) to function

Transparent OLED Architectures

Transparent Window

Open Window Open Window

Transparent Pixel

03/07/2019 OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 2019 12

Both architectures require a highly transparent + conductive cathode solution

Transparent pixel vs transparent window

Cathode Transparency is a Significant Barrier

OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 201903/07/2019 13

Worse for NIR to do strong absorption in metal thin films

Optical Layers Transmission

Glass ~90%

OCA ~100%

Organic ~100%

Cathode 20 – 80%

TFE 95-100%

Transmission = Window Size × Window Transmission

Cathode layer transmittance is limiting factor for transparent OLED

Cathode Transparency is a Significant Barrier

OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 201903/07/2019 14

Worse for NIR to do strong absorption in metal thin films

12 nm

20 nm

Data from Samsung

Transmission = Window Size × Window Transmission

Cathode layer transmittance is limiting factor for transparent OLED

Cathode Conductivity is a Significant Barrier

OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 201903/07/2019 15

0.5V

2.6V

Worse for transparent display due to transparency trade-off

Cathode layer sheet resistance is limiting factor for transparent OLED

Self assembly yields low resistance electrode with micron resolution

ConducTorr™ Electrode Technology

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ConducTorrTM

Patterning Material (CPM)

Micron-size patterning of top electrode

ConducTorrTM

Electrode Material (CEM)

+Patterning

Process

ConducTorr™ Patterning Process

03/07/2019 OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 2019 17

Multiple MP compatible process methods

(Patterning Material)

substrate

mask

Shadow Mask Deposition

Light Exposurewith Photomask

substratemask

light exposure

Direct Laser Writing (DLW)

substrate

Laser writing

(Electrode Material)

Open-frame CEM Deposition

High Resolution patterning demonstrated down to 6.5 µm features

ConducTorr™ Enables Fine Features

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ConducTorr™ film with 6.5 μm circular mesh (mask patterning)

6.5 µm

ConducTorr™ film with 25 μm lines (UV patterning)

Multiple MP compatible process methods

ConducTorr™ Mask-free Patterning

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Connection to auxiliary electrode in backplane

PDLPDLReflective Anode Auxiliary Electrode

OLED StackPhotoresist

Cathode

Oxide (IZO)

Electrical Contact

ConducTorr™ Mask-free Patterning

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Connection to auxiliary electrode in backplane

PDLPDLReflective Anode Auxiliary Electrode

OLED StackPhotoresist

Cathode

Electrical Contact

ConducTorr™ CPM

ConducTorr™ CEM

adsorption

migration

3V, 6 mA

Top-emission PMOLED sample with ConducTorr™ Mask-free Patterning

ConducTorr™ Demonstrated in 5.2” Mobile AMOLED

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• 5.2” diagonal AMOLED panel

• Vacuum process using existing AMOLED tools and mask set

• No ConducTorr™ related defects

• 120 ppi (37” @ 4K equivalent)

• 10 µm auxiliary electrode width

Width:10 µm

• 15 nm cathode + 600 nm ConducTorr™ Electrode

Mass production ready ConducTorr™ materials now available in kg scale

5.2” AMOLED display fabricated using ConducTorr™ Electrode

Transparent Window

Open Window Open Window

03/07/2019 OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 2019 22

ConducTorr™ solution can be applied to both transparent OLED architectures

Transparent pixel vs transparent window

CEM as Auxiliary Electrode

Transparent Pixel

CEM as Patterned Cathode

ConducTorr™ Electrode for Transparent OLEDs

OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 201903/07/2019 23

ConducTorr™ Demonstrated in 17” Transparent AMOLED17” Transparent AMOLED display fabricated using ConducTorr™ Electrode

OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 201903/07/2019 24

ConducTorr™ Demonstrated in 17” Transparent AMOLED17” Transparent AMOLED display fabricated using ConducTorr™ Electrode

Fill Factor ~ 15%

8-10 um

400 500 600 700 800 9000

10

20

30

40

50

60

70

80

90

100

110

20 nm CPM on Glass

Tra

nsm

itta

nce (

%)

Wavelength (nm)

99% Aperture Transparency

< 1 Ω/ Sheet Resistance

ConducTorr™ solution enables lowest resistance and highest transparency

~85% Electrode Transparency

OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 201903/07/2019 25

Image viewed through transparent panel

With ConducTorr™Without ConducTorr™

Image viewed through transparent panel

Improved See-through Image Quality with ConducTorr™Eliminates image blurring of see-through image for transparent AMOLED

OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 201903/07/2019 26

Improved See-through Image Quality with ConducTorr™

Transparent display Scene behind panelObserver

TFT

Transmitted Background

Internal TFT Reflection

TFT

Transmitted Background

CEM

Without ConducTorr™

With ConducTorr™

Image Blur

Eliminates image blurring of see-through image for transparent AMOLED

OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 201903/07/2019 27

ConducTorr™ Demonstrated in 17” Transparent AMOLED17” Transparent OLED display fabricated using ConducTorr™ Electrode

• > 65% Transparency at Panel Level

• < 1 Ω/ Sheet Resistance (15% fill factor)

• Eliminates see-through image blue

Live demo of 17” panel at SID 2019:

60.5 17-inch Transparent AMOLED Display With Self-Assembled Auxiliary Electrode

Email to schedule private demo at SID 2019

OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 201903/07/2019 28

ConducTorr™ CEM as Cathode in Transparent OLEDFabrication process using ConducTorr™ to pattern transparent window

OLED organic stack ConducTorrTM CPM on the Open Window

ConducTorrTM CEM with open mask

Transparent Window

OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 201903/07/2019 29

Glass Substrate

HIL

EML

ETL

Cathode

Reflective Anode

HTL1

HTL2

EBL

CPL

ConducTorr™ CEM as Cathode in Transparent OLED

Comparable voltage, efficiency, CIE and lifetime for ConducTorr™ CEM vs MgAg cathode

OLED device performance using ConducTorr™ CEM as cathode

OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 201903/07/2019 30

Dark Side Light Side

ConducTorr™ CEM as Cathode in Transparent OLEDTransparent OLED panels fabricated using ConducTorr™ CEM as cathode

Benefits of ConducTorr™ for Transparent OLEDs

03/07/2019 OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 2019 31

Mass production ready solution to enable transparent OLED displays

• High Aperture Transparency of 99% (including NIR)

• High Electrode Transparency of > 85% (15% fill factor)

• High Panel Transparency of > 65% demonstrated

• High Conductivity of Rs < 1 Ω/ (15% fill factor)

• Eliminates See-Through Image Blur from TFT

• Materials Ready for Mass Production in 2019

Michael G. Helander, PhDPresident & CEO

+1 (647) 704-5816michael.helander@otilumionics.comwww.otilumionics.com

03/07/2019 OTI Lumionics Inc. © 2019 ‐ Presented at OLEDs Korea 2019 32

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