Hyperfluorescence Materializing the Future of OLEDs

Transcription

1 Hyperfluorescence Materializing the Future of OLEDs October 17, 2017 Junji Adachi Display Innovation CHINA 2017/Beijing Summit

2 Company Founded March 9, 2015 HQ in Fukuoka, Japan, U.S. Operations in Boston 35+ employees, and growing Investors MSIVC SMBC VC Entrepreneur Aid

3 Topics 1. TADF 2. Hyperfluorescence 3. Commercialization 3

4 Legacy OLED Emission (Gen. 1&2) Fluorescence (1987~) Phosphorescence (2000~) Low Efficiency Low Cost Unlimited Design High color purity Enables Deep Blue High Efficiency High Cost Limited Design Low color purity No Deep Blue h + e - 25% 75% 25% Intersystem crossing (ISC) 100% N 2 Ir O O

5 TADF: 3 rd Generation OLED Emission Fluorescence (1987~) Phosphorescence (2000~) TADF (2012~) TADF: Thermally Activated Delayed Fluorescence Enables Deep Blue High Efficiency (via Reverse Intersystem Crossing) Low Cost Low color purity Unlimited Design Aromatic Compounds l µ H SO DE ST l : First-order mixing coefficient between singlet and triplet states H so : Spin-orbit coupling E ST : Singlet-triplet energy gap Nature, 492, 234 (2012)

6 Topics 1. TADF 2. Hyperfluorescence 3. Commercialization 6

7 TADF & Phosphorescence: issue for displays Wide emission spectrum is not suitable for display applications Narrow emission spectrum is required for display applications

8 Hyperfluorescence : A New Route for Triplet Harvesting Energy Label Fluorescence TADF : Exciton Generation & Fluorescence: Emission Cathode (Metal) EIL ー Emission Fluorescence Upconversion TADF Host - + S 1 T 1 ETL ー Guest1 TADF Guest2 Fluo. EML HTL HIL Emission + Host S eV T eV S 1 T eV FRET Inter molecular excitons transfer from TADF to fluorescence 2.23eV Anode (ITO) + Glass Substrate S 0 S 0 H. Nakanotani, et al, Nat. Commun., 5, 4016, 2014

9 Hyperfluorescence Light Intensity (a.u.) Hyperfluorescence combines the efficiency of TADF with the pure colors of fluorescent emitters. Hyperfluorescence - Narrow Spectrum - Bright TADF Phosphorescence - Wider Spectrum - Bright Wavelength Fluorescence - Narrow Spectrum - Low Intensity

10 Fluorescence vs. Hyperfluorescence Fluorescence Hyperfluorescence J V Hyperfluorescence Fluorescence J L Hyperfluorescence Fluorescence

11 Energy Label Fluorescence Yellow Comparison Demonstration Panel Energy Label Fluorescence Hyperfluorescence High efficiency: EQE MAX =20%) Fluorescence Low efficiency: EQE MAX =5% Emission Fluorescence Exciton Generation TADF Emission Fluorescence S 1 S 1 T 1 S 1 Hyperfluorescence T 1 T 1 TADF: Excitons Generation FRET: Inter molecular excitons transfer Fluorescence: Emission S 0 S 0 S 0

12 Enhancement of Color Purity and Efficiency TADF Hyperfluorescence : Improved Color Purity UHDTV HF CIE (0.27, 0.68) TADF CIE (0.32, 0.60) HDTV FWHM = 89nm FWHM = 32nm

13 Enhancement of Color Purity and Efficiency Luminance (cd/m Hyperfluorescence : Higher Light Intensity Hyperfluorescence TADF Wavelength Hyper TADF λ 519 nm 531 nm FWHM 32 nm 89 nm cd/m λ EQE 18.1 % 18.6 % cd/a

14 Red Hyperfluorescence TADF Hyperfluorescence : color tunable TADF CIE ( ) UHDTV HDTV HF CIE ( )

15 Red Hyperfluorescence TADF Hyperfluorescence : color tunable

16 Sky Blue TADF TADF: stable sky blue emitter

17 Top Emission Display

18 Optical Simulation of Top Emission Device Device Structure Device_1 Device_2 Device_3 Phosphorescence Assumption Emitting Material Phosphorescence : Ir(ppy)3 TADF : 4CzIPN Hyperfluorescence : TADF + Fluorescence Exciton Generation Efficiency: 100% Unit : nm APC/ITO HAT-CN NPD Tris-PCz mcbp mcbp : Dopant T2T Bpy-TP2 Liq MgAg (Irppy3) TADF 150/ (4CzIPN) Hyperfluorescence (Hyper) Phosphorescence (Irppy3) TADF 150/ (4CzIPN) Hyperfluorescence (Hyper) Phosphorescence (Irppy3) TADF 150/ (4CzIPN) Hyperfluorescence (Hyper)

19 Optical Simulation of Top Emission Device Results Device_1 Device_2 Device_3 Peak emission intensity W/(m2 nm sr) Peak Wavelength (nm) FWHM (nm) x CIE(x,y)* y Current Efficiency (cd/a) 1Phos TADF Hyper Phos TADF Hyper Phos TADF Hyper *BT CIE (x G, y G ) = (0.170, 0.797)

20 Hyperfluorescence shows superior performance Device_ 3 Peak emission intensity W/(m2 nm sr) Peak Wavelength (nm) FWHM (nm) x CIE(x,y) y Current Efficiency (cd/a) 1Phos (1.0) (1.0) (1.0) 2TADF (0.80) (1.17) (1.06) 3Hyper (1.93) (0.67) (1.46) Spectrum 1Phos. 2TADF 3Hyper.

21 W/(m2 nm sr) Hyperfluorescence: Far Superior to Phosphorescence Phos. TADF Hyper. UHD TV

22 Hyperfluorescence shows superior performance Hyperfluorescence vs Phosphorescence Two times higher light intensity at the peak wavelength 2/3 tighter color spectrum Achieving the next generation UHDTV color space 1.5 times higher Current Efficiency

23 Hyperfluorescence Summary The Optimum Solution for OLED Displays Technology Cost Efficiency Color Purity Fluorescence $ Low High Phosphorescence $$$ High Low TADF $ High Low Hyperfluorescence $ Highest High

24 Topics 1. TADF 2. Hyperfluorescence 3. Commercialization 24

25 Virtual discovery of molecules by using AI

26 Virtual discovery of molecules Software is already matching (or beating) humans Driverless cars, AlphaGo, IBM s Watson, speech & image recognition and generation, Is it time for molecular discovery? Predictive: Accurate Computational Chemistry (+ ML + heuristics). Fast and parallel Cheaper: Lower capital and operation costs. First Principles: Ideas out of the box. Automated: Frees operator to do more elevated tasks.

27 Discovery Engine Device performance data feeds back to every level of development Computational R&D Boston, MA, USA Experimental R&D Fukuoka, Japan

28 Workflow to accelerate material development Millions of 1 molecules Library Generation 3 Feedback to focus and improve computational screening Quantum Simulation Machine Learning 2 Hundreds of top candidates AI based Material Screening 4 Synthesis 5 Device fabrication Material Design & Synthesis 6 Testing 7 Scaling 8 Device Physics & Durability Manufacture

29 AI and machine learning permeate our R&D AI Deep neural networks, genetic algorithms, Bayesian optimization Intellectual property More patents faster Modeling DFT, MM Proprietary data management toolset EL Devices Design, fabrication JV & LT testing Molecules Design, synthesis characterization Products to market Better products faster

30 Latest Achievements We set out in 2017 to be the first company with a commercial TADF OLED in any color and we are on track to achieve that. LT50 Yellow Hyperfluorescence 47,000 hours HF_Yellow 47, , EQE 14.0%

31 Latest Achievements Hyperfluorescence performance measurements Color CIE(x,y) FWHM (nm) Efficiency (cd/a) t (hours) Red (0.64, 0.36) ,000 Yellow (0.46, 0.52) ,000 Green (0.28, 0.65) ,000

32 Patent Applications >300 Filed Patents 250 EU TW 200 Filed Registered 223 KR CN JP 150 US Registered Patents TW KR CN US JP

33 Topics and more 33

34 The world first product will be launched by the end of 2017 More than two times higher performance achieved

35 Acknowledgement 35

36 Thank you Materializing the Future of OLEDs