Synthesis of Host Polymers and Guests for Electrophosphorescence

Scott E. Watkins; Khai Leok Chan; Sung Yong Cho; Nicholas R. Evans; Andrew C. Grimsdale; Andrew B. Holmes; Chris S. K. Mak; Albertus J. Sandee; Charlotte K. Williams

Macromolecular Research, Vol.15, No.2, 129-133, March, 2007

Scott E. Watkins^{1, †}, Khai Leok Chan^{1, 2}, Sung Yong Cho^{1, 2}, Nicholas R. Evans³, Andrew C. Grimsdale¹, Andrew B. Holmes^{1, 4, †}, Chris S. K. Mak³, Albertus J. Sandee³, and Charlotte K. Williams⁵

¹School of Chemistry, Bio21 Institute, University of Melbourne, Parkville, Vic. 3010, Australia
²Melville Laboratory, Department of Chemistry, Lensfield Road, Cambridge CB2 1EW, Australia
³Melville Laboratory, Department of Chemistry, Lensfield Road, Cambridge CB2 1EW, UK
⁴Department of Chemistry, Imperial College, South Kensington, London SW7 2AZ, Australia
⁵Department of Chemistry, Imperial College, South Kensington, London SW7 2AZ, UK

E-mail:,

Significant progress has been realized in the design and synthesis of light emitting polymers that emit over the entire visible spectrum. However, up to seventy-five percent of charge recombination events can lead to triplet states that decay non-radiatively. Following the pioneering work in the field of small molecule organic light emitting devices, it has been found that solution processible iridium polymer complexes can be used to harness the wasted triplet energy. In this paper, new results with respect to the electrophosphorescence of solution processible tethered iridium polymer derivatives are presented. Furthermore, our approaches to the design of new high triplet energy conjugated polymer hosts are also reported.

Keywords:conjugated polymers;electrophosphorescence;synthesis;characterization;device physics

[References]

Burroughes JH, Bradley DDC, Brown AR, Marks RN, Mackay K, Friend RH, Burn PL, Holmes AB, Nature, 347, 539 (1990)
Kraft A, Grimsdale AC, Holmes AB, Angew. Chem.-Int. Edit. Engl., 37, 402 (1998)
Adachi C, O'Brien DF, Thompson ME, Forrest SR, J. Appl. Phys., 90, 5048 (2001)
Shen F, Xia H, Zhang C, Lin D, Liu X, Ma Y, Appl. Phys. Lett., 84, 55 (2004)
Gong X, Ostrowski JC, Moses D, Bazan GC, Heeger AJ, Liu MS, Jen AKY, Adv. Mater., 15, 45 (2003)
Zhang X, Jiang C, Mo Y, Xu Y, Shi H, Cao Y, Appl. Phys. Lett., 88, 051116 (2006)
Sandee AJ, Williams CK, Evans NR, Davies JE, Boothby CE, Kohler A, Friend RH, Holmes AB, J. Am. Chem. Soc., 126(22), 7041 (2004)
Sandee AJ, Williams CK, Evans NR, Davies JE, Boothby CE, Kohler A, Friend RH, Holmes AB, Chem. Eur. J., 11, 5007 (2005)
Evans NR, Sudha Devi L, Mak CSK, Watkins SE, Pascu S, Kohler A, Friend RH, Williams CK, Holmes AB, J. Am. Chem. Soc., 128, 6647 (2005)
Jiang JX, Jiang CY, Yang W, Zhen HG, Huang F, Cao Y, Macromolecules, 38(10), 4072 (2005)
Hertel D, Setayesh S, Nothofer HG, Scherf U, Mullen K, Bassler H, Adv. Mater., 13, 65 (2001)
Chan KL, McKiernan MJ, Towns CR, Holmes AB, J. Am. Chem. Soc., 127(21), 7662 (2005)
Chan KL, Watkins SE, Mak CSK, McKiernan MJ, Towns C, Pascu SI, Holmes AB, Chem. Commun., 5766 (2005)
Mo Y, Tian R, Shi W, Cao Y, Chem. Commun., 4925 (2005)
van Dijken A, Bastiaansen JJAM, Kiggen NMM, Langeveld BMW, Rothe C, Monkman A, Bach I, Stossel P, Brunner K, J. Am. Chem. Soc., 126(24), 7718 (2004)

[Referenced By]

[1] Burroughes JH, Bradley DDC, Brown AR, Marks RN, Mackay K, Friend RH, Burn PL, Holmes AB, Nature, 347, 539 (1990)

[2] Kraft A, Grimsdale AC, Holmes AB, Angew. Chem.-Int. Edit. Engl., 37, 402 (1998)

[3] Adachi C, O'Brien DF, Thompson ME, Forrest SR, J. Appl. Phys., 90, 5048 (2001)

[4] Shen F, Xia H, Zhang C, Lin D, Liu X, Ma Y, Appl. Phys. Lett., 84, 55 (2004)

[5] Gong X, Ostrowski JC, Moses D, Bazan GC, Heeger AJ, Liu MS, Jen AKY, Adv. Mater., 15, 45 (2003)

[6] Zhang X, Jiang C, Mo Y, Xu Y, Shi H, Cao Y, Appl. Phys. Lett., 88, 051116 (2006)

[7] Sandee AJ, Williams CK, Evans NR, Davies JE, Boothby CE, Kohler A, Friend RH, Holmes AB, J. Am. Chem. Soc., 126(22), 7041 (2004)

[8] Sandee AJ, Williams CK, Evans NR, Davies JE, Boothby CE, Kohler A, Friend RH, Holmes AB, Chem. Eur. J., 11, 5007 (2005)

[9] Evans NR, Sudha Devi L, Mak CSK, Watkins SE, Pascu S, Kohler A, Friend RH, Williams CK, Holmes AB, J. Am. Chem. Soc., 128, 6647 (2005)

[10] Jiang JX, Jiang CY, Yang W, Zhen HG, Huang F, Cao Y, Macromolecules, 38(10), 4072 (2005)

[11] Hertel D, Setayesh S, Nothofer HG, Scherf U, Mullen K, Bassler H, Adv. Mater., 13, 65 (2001)

[12] Chan KL, McKiernan MJ, Towns CR, Holmes AB, J. Am. Chem. Soc., 127(21), 7662 (2005)

[13] Chan KL, Watkins SE, Mak CSK, McKiernan MJ, Towns C, Pascu SI, Holmes AB, Chem. Commun., 5766 (2005)

[14] Mo Y, Tian R, Shi W, Cao Y, Chem. Commun., 4925 (2005)

[15] van Dijken A, Bastiaansen JJAM, Kiggen NMM, Langeveld BMW, Rothe C, Monkman A, Bach I, Stossel P, Brunner K, J. Am. Chem. Soc., 126(24), 7718 (2004)