A Highly Efficient Light-Emitting Poly{[5- (diphenylamino)-1,3-phenylenevinylene]- alt-(2,5-dihexyloxy-1,4-phenylenevinylene)}:  Synthesis and Optical Properties

Poly(phenylenevinylenes)

“…The green-emitting 33a gives electrolumescence with a balanced charge injection [59]. Addition of a hole-injecting diphenylamino group, which is at meta position relative to both vinylene bonds shown in 33b, improves the charge injection without significant shift in emission wavelength and raises the EL brightness by an order of magnitude to ∼7 000 cd m −2 [65]. Recent development [66] in the synthesis of meta-phenylene-containing PPVs includes the use of renewable resource starting materials 3-pentadecylphenol, which is an industrial by-product from the cashew-nut-processing industry.…”

A new blue‐light emitting polymer: Synthesis and photoinduced electron transfer process

“…After the temperature was allowed to rise to room temperature, the grayish green reaction mixture was heated and refluxed for 2 h. The color of the mixture turned from brownish red to bluish gray to deep brown and to deep cafe color gradually during heating and refluxing. 5-(N,N-diphenylamino)benzene-1,3-dicarbaldehyde (0.88 g) 12 in dry THF (50 mL) was added dropwise to the mixture at room temperature with magnetic stirring, and further refluxed for 20 h. The polymerization was quenched with dilute HCl (50 mL, 2 M) at 0 8C, the color of the reaction solution changed from deep violet to yellowish brown quickly. The product was repeatedly extracted with chloroform; the combined organic layers were washed with brine and water, respectively, dried over MgSO 4 and filtered.…”

Enhancing the electroluminescence performances of blue polymer light emitting devices via carriers transporting materials incorporation

“…20,21 Both electron and hole transporting molecules are often incorporated into the polymer backbone of LEP. [22][23][24][25][26][27][28][29] For example, oxadiazolecontaining compounds with electron-withdrawing properties are usually incorporated into the blue LEP backbone. [22][23][24][25][26][27] Introducing the oxadiazole group could enhance blue LEP electron affinity, causing energy barrier reduction between the light emitting layer and metal cathode.…”

“…[22][23][24][25][26][27] The aromatic aminecontaining compound is typically grafted into the polymer backbone for LEP hole transporting property enhancement. 28,29 Single-layer PLEDs with polymer blends of conjugated polymer and electron or hole carrier transporting materials have alternatively been investigated. [30][31][32][33][34][35] Enhanced brightness of blue LEPs by blending with hole-transporting materials (HTM) has been reported by Suh et al 30 PLEDs containing a blend of MEH-PPV and an electrontransporting material (ETM) have also been fabricated.…”