Red-green-blue polymer light-emitting diode pixels printed by optimized laser-induced forward transfer

An optimized laser-induced forward transfer (LIFT) technique has been used to fabricate tri-color organic light-emitting diode (OLED) pixels. At reduced pressures, and with a defined donor-receiver gap, patterned depositions of polyfluorene-based OLED pixels have been achieved. OLED pixel functionality has been demonstrated and compared with devices made using conventional deposition techniques. In addition, improved functionality has been obtained by coating the cathode with an electron-injecting layer, a process not possible using conventional OLED fabrication techniques. The OLED pixels fabricated by LIFT reach efficiencies on the range of conventionally fabricated devices and even surpass them in the case of blue pixels.

[1]  Frank Nüesch,et al.  A photoelectron spectroscopy study on the indium tin oxide treatment by acids and bases , 1999 .

[2]  Roland Hany,et al.  Aryltriazene Photopolymers for UV-Laser Applications: Improved Synthesis and Photodecomposition Study , 2007 .

[3]  Yang Yang,et al.  Multicolor Organic Light-Emitting Diodes Processed by Hybrid Inkjet Printing** , 1999 .

[4]  Alberto Piqué,et al.  Three‐Dimensional Printing of Interconnects by Laser Direct‐Write of Silver Nanopastes , 2010, Advanced materials.

[5]  Gregor Schwartz,et al.  White organic light-emitting diodes with fluorescent tube efficiency , 2009, Nature.

[6]  Tatsuya Sasaoka,et al.  13.1: Invited Paper: Technological Evolution for Large Screen Size Active Matrix OLED Display , 2007 .

[7]  Malte C. Gather,et al.  Solution‐Processed Full‐Color Polymer Organic Light‐Emitting Diode Displays Fabricated by Direct Photolithography , 2007 .

[8]  Junbiao Peng,et al.  Enhanced green electrophosphorescence by using polyfluorene host via interfacial energy transfer from polyvinylcarbazole , 2008 .

[9]  S. Beaupré,et al.  Solar‐Energy Production and Energy‐Efficient Lighting: Photovoltaic Devices and White‐Light‐Emitting Diodes Using Poly(2,7‐fluorene), Poly(2,7‐carbazole), and Poly(2,7‐dibenzosilole) Derivatives , 2010, Advanced materials.

[10]  Richard F. Haglund,et al.  Fabrication of polymer LEDs by resonant infrared pulsed laser ablation , 2007, SPIE OPTO.

[11]  Frank Nüesch,et al.  Laser-induced forward transfer of polymer light-emitting diode pixels with increased charge injection. , 2011, ACS applied materials & interfaces.

[12]  U. Schubert,et al.  Inkjet Printing of Polymers: State of the Art and Future Developments , 2004 .

[13]  Alberto Piqué,et al.  Laser Direct-Write Techniques for Printing of Complex Materials , 2007 .

[14]  D. Bradley,et al.  On the nature of the fluorenone-based emission in oxidized poly(dialkyl-fluorene)s , 2008 .

[16]  Patterned surface dipole layers for high-contrast electroluminescent displays , 1999 .

[17]  Heng Pan,et al.  Nanomaterial enabled laser transfer for organic light emitting material direct writing , 2008 .

[18]  Frank Nüesch,et al.  Improved laser-induced forward transfer of organic semiconductor thin films by reducing the environmental pressure and controlling the substrate–substrate gap width , 2011 .

[19]  W. R. Salaneck,et al.  Electroluminescence in conjugated polymers , 1999, Nature.

[20]  Frank Nüesch,et al.  Fabrication of organic light-emitting diode pixels by laser-assisted forward transfer , 2007 .

[21]  Craig B. Arnold,et al.  Ambient laser direct-write printing of a patterned organo-metallic electroluminescent device , 2011 .