Advanced Optoelectronic Materials Lab AOML www mse nthu

Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Outline • Advanced Optoelectronic Materials Laboratory in NTHU, MSE • Small Molecule Organic Photovoltaics (OPV) and Organic Light Emission Devices (OLED) – – Why small molecules? Device structures and optical designs Molecule structures and designs Recent Progress • 大學部專題研究規劃 Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

I. ADVANCED OPTOELECTRONIC MATERIALS LABORATORY (AOML) Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Brief History 2012 2011 2010 • 2009 • • • Lab established - 1 Group Leader - 2 Master Student Fabrication and measurement facilities move-in Keep working and keep Very high efficiency growing device (OPV, OLED, …) demonstrated - 1 Group Leader - 4 Ph. D Student - 1 Ph. D Student - 7 Master Student - 5 Master Student Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Facilities 2010 • Fabrication and measurement facilities movein Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Facilities (Fabrication) 2010 • Fabrication and measurement facilities movein Room 319, MSE building, NTHU • Vacuum evaporator integrated with N 2 glove box • Sputter • Spin coater (one in N 2 glove box and one in air) • Blade coating facilities • Hood • Temperature gradient sublimation system • Deionized water system • Microbalance • Humidity Cabinets • Dispenser, UV lamp for encapsulation Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Facilities (Measurements) Room 332 -1, MSE building, NTHU 2010 • Fabrication and measurement facilities movein • UV-Vis spectrometer with absorption/reflection option • Solar cell testing station (Solar simulator, Semiconductor parameter analyzer) • Photoresponse measurement system (Xe lamp, Monochromator, Current preamplifier, Lock-in amplifier with chopper, GPIB computer interface) • Multi-core CPU high-speed computer for multi-physics and quantum chemistry simulation • OLED testing station (Semiconductor parameter analyzer, Spectrophotometer with fiber collector, Probe station, Large area blue-enhanced Si-detector) • Time of flight measurement system (oscilloscope, high power Q-switch pulsed laser, 2 nd and 3 rd harmonic generation optics, cryostat, high voltage source) • Organic laser measurement system • Absolute quantum yield measurement system • Time resolved PL / EL measurement system • Transient absorption spectroscopy • Transient photocurrent / photovoltage spcetroscopy Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Main Theme Solution Processed SMOLED Small Molecule OSC (SMOSC) Inverted OSC Host materials for PHOLED Solution Processed SMOSC Organic Solar Cell Microcavity OSC OLED Crosslinkable HTL for OLED Os(II) PHOLED Organic Thin. Film Laser Organic Thin. Film Sensor Organic Photodetector AOML Novel OE Device Photophysics Exciton & Carrier Dynamics in OSC Device physics of DSSC Light outcoupling of OLED Plasmonic effect Organic-Inorganic Hybrid Device Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Group Members Organic Solar Cell OLED AOML Novel OE Device Photophysics Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

II. ORGANIC SMALL MOLECULE SOLAR CELLS Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Why Small Molecules for OSCs? Polymer OSC • • • Small Molecule OSC Defined molecule structure Purification by vacuum sublimation Very good batch-to-batch reproduction More advanced layer structures Ready for tandem configuration Vacuum & solution process are all possible Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Fundamental Research of Small Molecule Solar Active Thin Films Intermolecular Charge Transport Space-charge-limited-current and time-offlight technique Molecular structure and stacking Electronic structure Morphology Photophysics Electronic transitions Photoinduced electron transfer Exicton dynamics Geminate & Non-geminate recombination HOMO Morphology Spectroscopy Interpenetration bulk heterojunction networks Surface topology Molecular self-assembly (crystallization, aggregation) Spectroscopy Ellipsometry Absorption spectroscopy Time-resolved spectroscopy Photoresponse spectroscopy Impedance spectroscopy Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Simulation Fully Optical and Electrical Simulation Optical Simulation Electrical Simulation Rigorous classical electrodynamics Exciton diffusion dynamics and carrier transport behavior • General layered media (wavelength dependent • Exciton diffusion meet with criteria of boundary conditions in organic neat films optical constants, anisotropic) • Both optically “thin” and “thick” layers • Carrier transports with recombination • Full angle, full polarization and full spectrum • Current density in target spectra can be modeled Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

D-π-A molecule η = 3. 8 % Chem. Chomm 47, 7872 (2011) Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

A-A-D-A-A molecules η = 3. 7 % Org. Lett. 13, 4962 (2011) Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

D-A-A molecules (DTDCTB) Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

D-A-A molecules (DTDCTB) Voc: 0. 79 V Jsc: 14. 68 m. A/cm 2 FF: 0. 50 η = 5. 8 % JACS ASAP (2011) Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

D-A-A molecules (DTDCTP) DTDCTB DTDCTP Voc: 0. 79 V Jsc: 14. 68 m. A/cm 2 FF: 0. 50 Voc: 0. 95 V Jsc: 12. 1 m. A/cm 2 FF: 0. 56 η = 5. 8 % η = 6. 4 % Submitted (2011) Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

On-going Progress New donor with optimized HOMO/LUMO level Optimization of device structure η > 7 % Solution processed SMOSCs η ~ 7 % η > 5 % Flexible SMOSCs η ~ 5 % ITO-free SMOSCs Inverted SMOSCs η > 5 % Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Best Cell Efficiency Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

III. SMALL MOLECULAR ORGANIC LIGHT EMITTING DIODE Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Visible Light • Visible Light is electromagnetic radiation of a wavelength that is visible to the human eye Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Blue OLED Device FIr. Pic Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Green OLED Device Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Red OLED Device Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Binary White OLED 100 nits ~ 1000 nits CIE = (0. 33, 0. 34) (0. 33 , 0. 34) Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Trinary White OLED CIE Values lie on CCT Curve! Color rendering index (CRI) achieve 79 Ir(mppy)3 Ayu-1195 FIrpic Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

High CRI White OLED CRI enhances up to 84! Os(bpftz)2(dppb) Ayu-1195 FIrpic Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Color Tuning OLED Color temperature 4600~1600 K Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

OLEDs In Near Future Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

IV. 大學部專題研究 Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Some Successful Examples • 專題成果刊登於Organic Electronics (IF = 3. 998) • 專題成果刊登於Organic Letters (IF = 5. 250) • 專題成果本月準備投稿 • 專題成果獲國科會大專學生專題研究 補助 Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

What You Should Participate? • • Group Meeting (weekly) 專題生基本研究進度 Meeting (Bi-weekly, with T. A. ) 實驗室公共事務 (值週生) After having you own project: Join one of the subgroup meeting, literature report in group meeting Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Some New Projects • Functional Organic Nano Structure Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

Some New Projects • Alternative Fabrication Technique Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin

THANK YOU FOR YOUR ATTENTION Advanced Optoelectronic Materials Lab (AOML) www. mse. nthu. edu. tw/~hwlin