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Light-Emitting/Charge-Transporting Liquid Crystals and Polymer Networks SM Kelly and M O’Neill

Light-Emitting/Charge-Transporting Liquid Crystals and Polymer Networks SM Kelly and M O’Neill Organophotonics Research Group Departments of Chemistry and Physics University of Hull, UK. Light-Emitting/Charge-Transporting Liquid Crystals and Polymer Networks

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Light-Emitting/Charge-Transporting Liquid Crystals and Polymer Networks SM Kelly and M O’Neill

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  1. Light-Emitting/Charge-Transporting Liquid Crystals and Polymer Networks SM Kelly and M O’Neill Organophotonics Research Group Departments of Chemistry and Physics University of Hull, UK

  2. Light-Emitting/Charge-Transporting Liquid Crystals and Polymer Networks 1. EL+LC Polymer Networks & Diene Reactive Mesogens 2. Charge-Transport 3. Plane Polarised EL 4. Circularly Polarised EL 5. LC-PN-OLEDs  

  3. EL+LC Polymer Networks & Diene Reactive Mesogens

  4. EL+LC Polymer Networks & Diene Reactive Mesogens

  5. EL+LC Polymer Networks & Diene Reactive Mesogens Tg = 45º C; Cr-N = 93 ºC; N-I = 107 ºC

  6. EL+LC Polymer Networks & Diene Reactive Mesogens

  7. EL+LC Polymer Networks & Diene Reactive Mesogens

  8. EL+LC Polymer Networks & Diene Reactive Mesogens

  9. n m Cr N I 1 3 5 • 143 • 166 • 2 4 5 • 129 • 155 • 3 5 5 • 129 • 138 • 4 6 5 • 140 (• 128) • 5 8 5 • 92 • 112 • 6 8 7 • 46 • 103 • 7 8 10 • 38 • 96 • 8 8 11 • 64 • 87 • EL+LC Polymer Networks & Diene Reactive Mesogens

  10. EL+LC Polymer Networks & Diene Reactive Mesogens

  11. EL+LC Polymer Networks & Diene Reactive Mesogens

  12. EL+LC Polymer Networks & Diene Reactive Mesogens

  13. Charge-Transport in LC Polymer Networks: Nematic LCs

  14. Charge-Transport in LC Polymer Networks: Nematic LCs Tg = 45 ºC; Cr-N = 93 ºC; N-I = 107 ºC mh = 3 x 10-5 cm2 V-1 s-1at 25 ºC

  15. Charge-Transport in LC Polymer Networks: Smectic LCs Cr-I = 65 ºC; SmA-I = 61 ºC me = 2 x 10-4 cm2 V-1 s-1 at 58 ºC

  16. Charge-Transport in LC Polymer Networks: Smectic LCs Cr-SmC = 25 ºC; SmC-I = 125 ºC me = 1.5 x 10-5 cm2 V-1 s-1 at 25 ºC

  17. Charge-Transport in LC Polymer Networks: Columnar LCs Cr-Colho < -50 ºC; Colho-I = 174 ºC

  18. Charge-Transport in LC Polymer Networks: Chiral N* LCs c) Tg = 29 ºC; Cr-I = 123 ºC; N*-I = 122 ºC crosslinked network

  19. EL + LC Polymer Networks: Plane Polarised EL

  20. EL + LC Polymer Networks: Plane Polarised EL Rolic: Nature, 212, 351, 1996

  21. EL + LC Polymer Networks: Plane Polarised EL Tg = 45 ºC; Cr-N = 93 ºC; N-I = 107 ºC

  22. EL + LC Polymer Networks: Plane Polarised EL

  23. EL + LC Polymer Networks: Circularly Polarised Light Tg = 29 ºC; Cr-I = 123 ºC; N*-I = 122 ºC ge = 2[IL-IR] [IL+IR] DlB = DnlB n Dn = 0.65 [450 nm]

  24. Maximum gPL is 1.78 gPL is constant over 80 nm. Maximum IL/IR is 16:1. Average IL/IR is 8.3:1 EL + LC Polymer Networks: Circularly Polarised Light Circularly polarised PL spectra g factor in PL Excitation at 405 nm: 3 m cell with one alignment surface

  25. EL + LC Polymer Networks: LC-PN-OLEDs Bilayer Monolayer

  26. EL + LC Polymer Networks: LC-PN-OLEDs Bilayer OLED Trilayer OLED

  27. Acknowledgements CHEMISTRY: • MP ALDRED • D DONG (PDRA) • AJ EASTWOOD • GJ RICHARDS • P VLACHOS (PDRA) PHYSICS: • AEA CONTORET • S CHUNG • SR FARRAR (PDRA) • BA MANSOOR Al-SAIDI   • KL WOON FINANCE: • EPSRC/HULL UNIVERSITY/EU

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