title: Solution-processable stiff dendrimers: synthesis, photophysics, film morphology, and electroluminescence.
abstract: A series of solution-processable conjugated dendrimers (T1-T5) consisting of a pyrene core, fluorene/carbazole dendrons, and acetylene linkages have been successfully synthesized and fully characterized. The effects of generation on the photoluminescence (PL) and electroluminescence (EL) of dendrimers are investigated. Photon harvest and energy transfer are observed in these dendritic systems. Efficient electroluminescent single layer dendrimer devices are achieved through control of dendrimer generation and optimization of spin-coating speed. A T3-based device exhibits yellow EL (CIE: 0.49, 0.50) with a maximum brightness of 5590 cd/m(2) at 16 V, a high current efficiency of 2.67 cd/A at 8.6 V, and a best external quantum efficiency of 0.86%.
authors.affiliation: Department of Chemistry, Zhejiang University, Hangzhou 310027, People's Republic of China.
authors.forename: Zujin
authors.initials: Z
authors.lastname: Zhao
authors.forename: Juo-Hao
authors.initials: JH
authors.lastname: Li
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Chen
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Wang
authors.forename: Ping
authors.initials: P
authors.lastname: Lu
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
mesh_terms: D000114:Acetylene / Q000737:chemistry; D002227:Carbazoles / Q000737:chemistry; D050091:Dendrimers / Q000138:chemical synthesis* / Q000737:chemistry*; D004563:Electrochemistry; D005449:Fluorenes / Q000737:chemistry; D049449:Luminescence; D008567:Membranes, Artificial; D008958:Models, Molecular; D015394:Molecular Structure; D010777:Photochemistry; D011721:Pyrenes / Q000737:chemistry; D012996:Solutions; D013237:Stereoisomerism
chemical_list: D002227:Carbazoles; D050091:Dendrimers; D005449:Fluorenes; D008567:Membranes, Artificial; D011721:Pyrenes; D012996:Solutions; C041514:carbazole; C030984:pyrene; D000114:Acetylene