A solution processible semiconducting polymer interlayer for blue light-emitting diodes

Cited 3 time in webofscience Cited 0 time in scopus
  • Hit : 440
  • Download : 6
Polyimide containing triphenylamine derivative (TPD-PI) was synthesized to prepare a polymer interlayer having insolubility in common nonpolar solvents for light-emitting polymers. The TPD-PI was prepared from the synthesized diamine monomer and 4, 4'-(hexafluoropropylidene)-diphthalic anhydride by the standard two-step polymerization method, which involved ring-opening polymerization and subsequent cyclodehydration. We incorporated this novel semiconducting polymer (TPD-PI) between the hole conducting layer (PEDOT:PSS) and the blue-emitting layer (PFO, poly(dioctylfluorene)) of a light-emitting diode. The molecular architecture of the TPD-PI interlayer means that it is soluble in most aprotic polar solvents, and completely insoluble in acetone, toluene, and xylene, which are used as solvents for most emitting layers; these solubility properties make the direct spin-coating of the interlayer possible. The surfaces of interlayer have stability against the general organic solvents for a polymeric layer with a nanometre scale. The efficiency increases from 0.25 to 0.351 cd A(-1) and the lifetime rises by 50% as a result of the insertion of the interlayer, which also has advantages in the following areas: interface structure, solubility characteristics, energetic position, hole transport of the interlayer, and thermal stability of the polyimide main chain.
Publisher
IOP PUBLISHING LTD
Issue Date
2007-05
Language
English
Article Type
Article
Keywords

EFFICIENCY; STABILITY; LAYER; ELECTROPHOSPHORESCENCE; ELECTROLUMINESCENCE; POLYFLUORENES; INJECTION; DEVICES; BLENDS

Citation

NANOTECHNOLOGY, v.18, no.17, pp.3201 - 3226

ISSN
0957-4484
URI
http://hdl.handle.net/10203/7408
Appears in Collection
NT-Journal Papers(저널논문)CBE-Journal Papers(저널논문)
Files in This Item
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 3 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0