Structural and magnetic properties of Sr2Fe1−xGaxMoO6 (0≤x≤0.25)

Lu, Min; Wang, Jing Ping; Liu, Jian Fen; Song, Wei; Hao, Xian; Zhou, Danhong; Liu, Xiao Juan; Wang, Zhi; Meng, Jian

doi:10.1016/j.jallcom.2006.01.112

Cited by 19 publications

(3 citation statements)

References 28 publications

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“…Later, researches on energy transfer mechanism of anthracene/tetracene (An/Te) mixed crystals were carried out, but the standpoints and conclusions were not consistent with each other. One explanation was that the predictions of a long-range Förster energy-transfer mechanism can be made to agree with experimental results [8] , while the other approved the predictions of the combined theory of exciton diffusion and long-range resonance energy transfer [9] .Compared with extensive investigation of inorganic mixed crystals [10][11][12] , researches on organic mixed crystals are still not prevalent. Even for tetracene-doped anthracene crystals, such a well-studied system, until now no one can completely know what such changes caused…”

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confidence: 91%

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Preparation and spectral characteristics of anthracene/tetracene mixed crystals

Duan

Zhang

et al. 2009

Sci. China Ser. B-Chem.

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A series of tetracene-doped anthracene crystals with different doping concentrations (the highest molar ratio 100 : 1) are grown from solution. Crystal structures and optical characteristics of the above mixed crystals are investigated at room temperature. By changing the doping concentrations, the fluorescence can be adjusted from blue-green to green and even to yellow-green. The emission spectra of anthracene/tetracene (An/Te) mixed crystals reveal the sensitized fluorescence of tetracene and the partial quenching of anthracene emission. The data of transient photoluminescence (PL) decays illustrate that in An/Te mixed crystals, the decay of anthracene becomes faster, while the PL lifetime of tetracene is longer than that of the tetracene single crystals. All above experimental results suggest that there is excitation energy transfer from anthracene to tetracene in the mixed crystals.anthracene, tetracene, organic mixed crystals, fluorescence spectrum, energy transferIn recent years, researches on organic semiconductor devices have increased exponentially. The high carrier mobility characteristic of organic crystals favor the study of intrinsic charge transfer mechanism in organic semiconductor and the exploration of organic fieldeffect transistors (OFETs) with high performance. Thus, organic crystals with special photo/ electro-properties have become an attractive field and been studied worldwide.Doping, as an efficacious modulation to improve the performance of devices, has been widely applied in the field of organic semiconductors [1][2][3] . Maybe similar effects could be achieved in crystal doping systems [4,5] , namely, mixed crystals. Furthermore, the preparations of organic mixed crystals and the researches on their properties are valuable for a deeper understanding of doped effect and energy transfer mechanism in organic semiconductors.Early in 1963, Pope et al. [6] found the electroluminescence (EL) of 0.1% (molar ratio) tetracene doped anthracene crystals and first fabricated EL devices of organic mixed crystals. In 1971, Kawabe et al. [7] reported that the fluorescence of anthracene was strongly quenched and the intense green fluorescence was observed even at the molar ratio of tetracene as low as 10 −6 . Later, researches on energy transfer mechanism of anthracene/tetracene (An/Te) mixed crystals were carried out, but the standpoints and conclusions were not consistent with each other. One explanation was that the predictions of a long-range Förster energy-transfer mechanism can be made to agree with experimental results [8] , while the other approved the predictions of the combined theory of exciton diffusion and long-range resonance energy transfer [9] .Compared with extensive investigation of inorganic mixed crystals [10][11][12] , researches on organic mixed crystals are still not prevalent. Even for tetracene-doped anthracene crystals, such a well-studied system, until now no one can completely know what such changes caused

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confidence: 91%

“…Compared with extensive investigation of inorganic mixed crystals [10][11][12] , researches on organic mixed crystals are still not prevalent. Even for tetracene-doped anthracene crystals, such a well-studied system, until now no one can completely know what such changes caused by doping really look like.…”

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confidence: 99%

Preparation and spectral characteristics of anthracene/tetracene mixed crystals

Duan

Zhang

et al. 2009

Sci. China Ser. B-Chem.

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“…SFMO is a typical ordered double perovskite structure A 2 BB O 6 , where A is the alkali-earth ion, B and B are the transition metals. As reported in [3,4], the crystal structure of SFMO is cubic or tetragonal, where the alternating FeO 6 and MoO 6 octahedral are arranged regularly in a rock salt superlattice with the voluminous Sr cation occupying the voids among the octahedral. The existence of anti-site defects (Mo on Fe site and vice versa) has great influence on the magnetic and transport properties of Sr 2 FeMoO 6 [5,6].…”

Section: Introductionmentioning

confidence: 66%