A Color‐Tunable Europium Complex Emitting Three Primary Colors and White Light

He, Guangjie; Guo, Dong; He, Cheng; Zhang, Xiaolin; Zhao, Xin-Hao; Duan, Chunying

doi:10.1002/anie.200901266

Cited by 241 publications

(126 citation statements)

References 47 publications

(13 reference statements)

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“…The PL spectra for 8 in the thin lm showed red shis from their PL in solution. Similar results were obtained for compounds [11][12][13][14][15][16][17][18]. Such a kind of red shi in PL emission in the solid state is common and has been observed by others for organic small molecules as well as polymeric materials 33 possibly due to (a) the exciton hopping process in the solid state, (b) the intermolecular interaction in the solid state i.e.…”

supporting

confidence: 85%

Engineering fused coumarin dyes: a molecular level understanding of aggregation quenching and tuning electroluminescence via alkyl chain substitution

et al. 2014

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Simple molecular structures capable of emitting over the entire visible range are still a challenge. Planar molecular structures have the drawback of fluorescence quenching in the solid state thus limiting their application fields. Combining long range excimer/exciplex emissions with a compound emission have been used to get white light. In this work, a series of new coumarin derivatives having a planar structure have been synthesized and characterized. The effects of systematic variation in alkyl chain functionalization providing morphological variations that permit interesting solid state emitting properties have been discussed simultaneously with electrochemical behavior and OLED (organic light emitting diode) device applications. Carbon chains containing 0-16 carbon atoms have been studied in order to conclude the results that systematic changes in alkyl group substitution can be utilized as a tool to tune the emitting color of these planar coumarins. Alkyl chains were introduced by O-acylation and O-benzoylation reaction on the hydroxyl group of parent coumarin 5. Thus the present strategy is also helpful in establishing a template to control the unproductive interchromophore electronic couplings.Solid state fluorescence properties support the crystal studies. Theoretical studies are also in agreement with experimental data. Electroluminescence of Device 2 with a turn on voltage (V on ) around 5-6 V having s-CBP doped with 1% of 8 having alkyl substitution of 2-carbons is found to exhibit white emission with CIE co-ordinates of (0.29, 0.34) which is close to white emission while the alkyl substitution of 14-carbons (compound 17) in Device 7 (V on ¼ 7 V) exhibited green emission. Thus a strategy helpful to tune the electroluminescence has been discussed.

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supporting

confidence: 85%

Engineering fused coumarin dyes: a molecular level understanding of aggregation quenching and tuning electroluminescence via alkyl chain substitution

et al. 2014

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“…Many of such single-component full-color-emitting phosphors have emerge very recently, ranging from semiconducting nanocrystals [1,2], organic compound [3], complex [4,5], hybrid [6] to rare earth doped inorganic hosts [7][8][9][10][11][12][13][14][15][16][17][18][19][20] as well. As to the present interest in a full-color phosphor, A 3 MgSi 2 O 8 :Eu 2+ , Mn 2+ (A = Ba, Sr, Ca) [21], we have identified that, a green-band-emission peaked at ∼505 nm does not originate from Ba sites in Ba 3 MgSi 2 O 8 host lattice but from those in a newly formed orthosilicate phase, Ba 2 SiO 4 [22,23].…”

Section: Introductionmentioning

confidence: 99%

Green-light-emitting phase in Ba3MgSi2O8:Eu2+, Mn2+ full-color phosphor for white-light-emitting diodes via addition of Si3N4

Liu

Mao

et al. 2010

Journal of Alloys and Compounds

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“…[1][2][3][4][5][6] Recently, researchers have focused on color-tunable luminescent materials based on polymer materials. [7][8][9][10][11] The common method to create such materials is using multiple chromophores to modify polymeric backbone. [12][13][14][15] However, this method is limited because dialing color requires the occurrence of reaction between polymer and chromophore monomer.…”

Section: Introductionmentioning

confidence: 99%

Color‐Tunable Luminescent Materials Based on Functional Polysiloxane and Lanthanide Ions

Lai

Wang

et al. 2011

Macro Chemistry & Physics

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Color‐tunable luminescent materials based on α, ω‐diethyl malonate terminated polydimethylsiloxane (EP) and lanthanide ions are synthesized. The EP is synthesized from α, ω‐hydride terminated polysiloxane (HP) and diethyl allyl malonate via hydrosilylation reaction. The FT‐IR spectra, 1H NMR, 13C NMR, and GPC are used to characterize the structures of HP and EP. The obtained materials, which were synthesized by incorporating Eu3+ (or Tb3+) ions into EP, exhibit excellent narrow‐width red (or green) emissions. Moreover, when integrating heterometallic Eu3+/Tb3+ ions into EP, the luminescence spectra of the complexes are composed of green and red emission. Color‐tunable luminescent materials are obtained by tuning the proportions of Eu3+ and Tb3+ ions. magnified image

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A Color‐Tunable Europium Complex Emitting Three Primary Colors and White Light

Cited by 241 publications

References 47 publications

Engineering fused coumarin dyes: a molecular level understanding of aggregation quenching and tuning electroluminescence via alkyl chain substitution

Engineering fused coumarin dyes: a molecular level understanding of aggregation quenching and tuning electroluminescence via alkyl chain substitution

Green-light-emitting phase in Ba3MgSi2O8:Eu2+, Mn2+ full-color phosphor for white-light-emitting diodes via addition of Si3N4

Color‐Tunable Luminescent Materials Based on Functional Polysiloxane and Lanthanide Ions

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