𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Synthesis, Photophysics, and Electroluminescence of Poly(dibenzofluorene)s

✍ Scribed by Wei-Zhi Wang; Rui Zhu; Qu-Li Fan; Hui Xu; Lin-Tao Hou; Yong Cao; Wei Huang

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
142 KB
Volume
27
Category
Article
ISSN
1022-1336

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Summary: A series of soluble poly(dibenzofluorene) derivatives that contain dibenzo[a,g]fluorene, dibenzo[a,i]fluorene, and dibenzo[c,g]fluorene repeat units in the main chain have been synthesized, characterized, and explored as emissive materials in polymer light emitting diodes (PLEDs). These polymers possess higher glass transition temperatures (108–133 °C) than that of poly(2,7‐(9,9‐dialkyl)fluorene) (PFO). The photophysical and electrochemical properties of these polymers are affected by the steric hindrance effect. These polymers emit blue light in dilute solution (378–400 nm) and in the solid state (426–447 nm). As emissive materials in PLEDs, blue electroluminescence with a brightness of up to 3 130 cd · m^−2^ is obtained from single‐layer diodes of P~2~ with aluminum/barium in air.

The photophysical and electrochemical properties of these polymers are affected by the size effect.

magnified imageThe photophysical and electrochemical properties of these polymers are affected by the size effect.

📜 SIMILAR VOLUMES

Photophysical and Electroluminescent Pro
Photophysical and Electroluminescent Properties of Hyperbranched Polyfluorenes
✍ Liming Ding; Zhishan Bo; Qinghui Chu; Jing Li; Liming Dai; Yi Pang; Frank E. Kar 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 507 KB

## Abstract **Summary:** Properties of a series of hyperbranched polyfluorenes were investigated. Increasing the benzene “crosspoint” density blue‐shifts the absorption and PL since the crosspoints interrupt __π__‐electron conjugation, decreasing conjugation length, and thus increasing chromophore

Electroluminescence of regioregular poly
Electroluminescence of regioregular poly(alkylthiophenes)
✍ P. Barta; W. R. Salaneck; M. Zagórska; A. Proń; S. Nizioł 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 239 KB

Regioregular poly(4,4'-didecyl-2,2'-bithiophene) with exclusively head-to-head and tail-to-tail couplings between adjacent alkylated thiophene rings was studied as a potential material for the active layer in light-emitting diodes (LEDs). Readily visible green light was derived from a single layer L

Fluorene-Based Conjugated Poly(azomethin
Fluorene-Based Conjugated Poly(azomethine)s: Synthesis, Photophysical Properties, and Theoretical Electronic Structures
✍ Cheng-Liang Liu; Wen-Chang Chen 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 244 KB

## Abstract **Summary:** Soluble conjugated poly(azomethine)s, **PFI** and **PFCI**, were synthesized from 2,7‐diformyl‐9,9′‐dioctylfluorene (**DFOF**) with diamines. The replacement of the fluorene (**PFI**) by carbazole (**PFCI**) reduces the ionization potential but enhances the band gap (__E__~

Synthesis of Poly(N-aryl-2,7-carbazole)s
Synthesis of Poly(N-aryl-2,7-carbazole)s for Efficient Blue Electroluminescence Materials
✍ Ryohei Koguchi; Norifumi Kobayashi; Toshinobu Shinnai; Kazuma Oikawa; Kazuhiko T 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 239 KB

## Abstract Several poly(__N__‐phenyl‐2,7‐carbazole)s that have dialkoxy groups at the __m__‐ and __p__‐positions (P__mp__CzDC, P__mp__PhDC, P__mp__CBiDC, P__mp__EHC), a silyl group at the __p__‐position (P__p__PhDSiC), and a diphenylamino group (P__m__PhDAC, P__m__EHAC) at the __m__‐position of th