Pyrene based conjugated materials: synthesis, characterization and electroluminescent properties

Abstract

In this work, three novel pyrene cored small conjugated molecules, namely 1,3,6,8-tetrakis(6-(octyloxy)naphthalene-2-yl)pyrene (PY-1), 1,3,6,8-tetrakis((E)-2-(6-(n-octyloxy)naphthalene-2-yl)vinyl)pyrene (PY-2) and 1,3,6,8-tetrakis((6-(n-octyloxy)naphthalene-2-yl)ethynyl)pyrene (PY-3) have been synthesized by Suzuki, heck and Sonogashira organometallic coupling reactions, respectively. The effects of single, double and triple bonds on their optical, electrochemical, and thermal properties are studied in detail. These are all materials fluorescent and they have been used in organic light-emitting diodes (OLEDs) and their electroluminescent properties have been studied.

Phenothiazine and carbazole substituted pyrene based electroluminescent organic semiconductors for OLED devices

“…The observed OLED performances for both compounds are much 60 better than our previously reported naphthalene substituted pyrene derivatives. 25 The stable blue color output additionally proves that PY-CA has high prospective to be a blue emitter in OLED applications. The turn on voltage of 3.3 V also makes PY-CA based OLED device energy efficient.…”

“…The effects of single, double and triple bonds on their optical, electrochemical, and thermal properties were studied in detail and all these materials were used successfully in OLEDs. 25 In the methoxyphenyl)-9H-carbazol-3-yl)pyrene (PY-CA) and 1, 3, 6, 8-tetrakis(10-(4-methoxyphenyl)-10H-phenothiazin-3-yl)pyrene (PY-PH). Although the carbazole and phenothiazine combination have been reported as an efficient deep blue and green emitting material in OLEDs earlier 26,27 but so far there is no report in the literature about using them in the form of tetra-functionalized pyrene derivatives for any device application.…”

“…Optical band gap calculated using a thin film of PY-CA (upper) and PY-PH (lower) spin coated on the ITO coated glass substrates.Density Functional Theory (DFT)32 calculations were performed25 …”

Luminescence performance of poly(aryl ether)s membranes with different morphologies

“…In addition, these π‐conjugated polymers are generally solubility in common solvents and are easily manufacture. A wide range of organic luminescent materials including polyfluoranthene, polypyrene, polynaphthalene, and poly(m‐phenylene) were synthesized and evaluated for their photoelectric properties . Among the fluorescence emission unit, those containing fluorene groups which have gained increasing attention for their fundamental investigation and intelligent applications due to their good fluorescence quantum yield, large optical gain, outstanding optical responsibility and high charge‐carrier mobility .…”

A new pyrene cored small organic molecule with a flexible alkyl spacer: a potential solution processable blue emitter with bright photoluminescence

“…25 A number of light emitting materials based on pyrene have been reported in the literature. [26][27][28][29] Recently, we reported carbazole and phenothiazine containing solution processable blue and green emitting 1, 3, 6, 8-tetrasubstituted pyrene derivatives. 27 Pyrene has been successfully utilized for synthesis of materials with pure blue and green emission.…”