Abstract
Introducing phosphorescent emitters into polymers to harvest both singlet and triplet excitons in the EL process has been proved to be an effective approach to enhance the device efficiency [1–6]. To ensure that all the triplet excitons are confined effectively on the phosphorescent emitters, triplet energy back transfer (TEBT) from phosphors to polymer hosts should be inhibited (see Sect. 1.3 in Chap. 1)
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Chen XW, Liao JL, Liang YM et al (2003) High-efficiency red-light emission from polyfluorenes grafted with cyclometalated iridium complexes and charge transport moiety. J Am Chem Soc 125:636–637
Sandee AJ, Williams CK, Evans NR et al (2004) Solution-processible conjugated electrophosphorescent polymers. J Am Chem Soc 126:7041–7048
Evans NR, Devi LS, Mak CSK et al (2006) Triplet energy back transfer in conjugated polymers with pendant phosphorescent iridium complexes. J Am Chem Soc 128:6647–6656
Jiang JX, Xu YH, Yang W et al (2006) High-efficiency white-light-emitting devices from a single polymer by mixing singlet and triplet emission. Adv Mater 18:1769–1773
Wu F-I, Yang X-H, Neher D et al (2007) Efficient white-electrophosphorescent devices based on a single polyfluorene copolymer. Adv Funct Mater 17:1085–1092
Chien CH, Liao SF, Wu CH et al (2008) Electrophosphorescent polyfluorenes containing osmium complexes in the conjugated backbone. Adv Funct Mater 18:1430–1439
Chen YC, Huang GS, Hsiao CC et al (2006) High triplet energy polymer as host for electrophosphorescence with high efficiency. J Am Chem Soc 128:8549–8558
Wu ZL, Xiong Y, Zou JH et al (2008) High-Triplet-Energy poly 9,9 ‘-bis(2-ethylihexyl)-3,6-fluorene) as host for blue and green phosphorescent complexes. Adv Mater 20:2359–2364
Liu J, Pei Q (2010) Poly(M-Phenylene): conjugated polymer host with high triplet energy for efficient blue electrophosphorescence. Macromolecules 43:9608
Shao KF, Xu XJ, Yu G et al (2006) Blue electrophosphorescent light-emitting device using a novel nonconjugated polymer as host materials. Chem Lett 35:404–405
Yeh HC, Chien CH, Shih PI et al (2008) Polymers derived from 3,6-fluorene and tetraphenylsilane derivatives: solution-processable host materials for green phosphorescent oleds. Macromolecules 41:3801–3807
Huang SP, Jen TH, Chen YC et al (2008) Effective shielding of triplet energy transfer to conjugated polymer by its dense side chains from phosphor dopant for highly efficient electrophosphorescence. J Am Chem Soc 130:4699–4707
King SM, Al-Attar HA, Evans RJ et al (2006) The use of substituted iridium complexes in doped polymer electrophosphorescent devices: the influence of triplet transfer and other factors on enhancing device performance. Adv Funct Mater 16:1043–1050
Shao S, Ma Z, Ding J et al (2012) Spiro-linked hyperbranched architecture in electrophosphorescent conjugated polymers for tailoring triplet energy back transfer. Adv Mater 24:2009–2013
Dexter DL (1953) A theory of sensitized luminescence in solids. J Chem Phys 21:836–850
Saragi TPI, Spehr T, Siebert A et al (2007) Spiro compounds for organic optoelectronics. Chem Rev 107:1011–1065
Ostrowski JC, Robinson MR, Heeger AJ et al. (2002) Amorphous iridium complexes for electrophosphorescent light emitting devices. Chem Commun 7:784–785
Yu XM, Zhou GJ, Lam CS et al (2008) A yellow-emitting iridium complex for use in phosphorescent multiple-emissive-layer white organic light-emitting diodes with high color quality and efficiency. J Organomet Chem 693:1518–1527
Sudhakar M, Djurovich PI, Hogen-Esch TE et al (2003) Phosphorescence quenching by conjugated polymers. J Am Chem Soc 125:7796–7797
McGee KA, Mann KR (2007) Selective low-temperature syntheses of facial and meridional tris-cyclometalated iridium(III) complexes. Inorg Chem 46:7800–7809
Wong KT, Liao YL, Lin YT et al (2005) Spiro-configured bifluorenes: highly efficient emitter for uv organic light-emitting device and host material for red electrophosphorescence. Org Lett 7:5131–5134
Gong X, Ostrowski JC, Bazan GC et al (2003) Electrophosphorescence from a conjugated copolymer doped with an iridium complex: high brightness and improved operational stability. Adv Mater 15:45–49
Gong X, Ostrowski JC, Moses D et al (2003) Electrophosphorescence from a polymer guest-host system with an iridium complex as guest: forster energy transfer and charge trapping. Adv Funct Mater 13:439–444
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2014 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Shao, S. (2014). Spiro-Linked Hyperbranched Architecture for Electrophosphorescent Polymers. In: Electrophosphorescent Polymers Based on Polyarylether Hosts. Springer Theses. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-44376-7_5
Download citation
DOI: https://doi.org/10.1007/978-3-662-44376-7_5
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-662-44375-0
Online ISBN: 978-3-662-44376-7
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)