Electroluminescence from single-layer thin-film devices based on three binuclear Ru(II) complexes with different length of flexible bridges

Ju, Chuan-Chuan; Chen, Chun‐Hui; Yuan, Chui-Li; Wang, Kezhi

doi:10.1016/j.tsf.2011.01.235

Cited by 6 publications

(6 citation statements)

References 52 publications

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“…However, only a few examples on the employment of multinuclear complexes in LEC devices exist in the scientific literature. [37][38][39][40][41][42][43] Bideh and Shahroosvand 37 and Ju et al 38 reported on ionic homodinuclear Ru complexes, which delivered strong emission with an external quantum efficiency (EQE) of 0.1-0.7% in LEC devices. Leprêtre and co-workers demonstrated non-ionic homodinuclear Ru complexes that exhibited orange emission in LECs with an EQE of 0.02 %, 39 while Fernandez-Cestau et al introduced novel heterotetranuclear Ir/Ag and Ir/Cu complexes equipped with alkynyl bridging ligands in LEC devices that delivered a peak luminance of ~20 cd/m 2 .…”

Section: Introductionmentioning

confidence: 99%

An efficient heterodinuclear Ir(iii)/Pt(ii) complex: synthesis, photophysics and application in light-emitting electrochemical cells

et al. 2019

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Section: Introductionmentioning

confidence: 99%

An efficient heterodinuclear Ir(iii)/Pt(ii) complex: synthesis, photophysics and application in light-emitting electrochemical cells

et al. 2019

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“…Figure 2d shows the significant different of current density and luminance measurements over applied of two device based on B1 and B2 complexes. As summarized in Table 2 , complex B2 indicates the better EL characteristic than B1 which is the highest value reported for the binuclear ruthenium polypyridyl complexes 47 .…”

Section: Resultsmentioning

confidence: 85%

“…As our knowledge, the OLED and LEC based on binuclear ruthenium polypyridyl complexes is very rare, which summarized in ESI. Table S4 27 , 29 , 47 – 49 . The highest demonstrated EQE value of NIR EL for a binuclear ruthenium polypyridyl complex with an anode ITO/complex (100 nm)/Au (100 nm) configuration is 0.013% 48 , while the EQE value in current work is reached to 0.682 % with the configuration of ITO/B2 (90 nm)/Ga:In.…”

Section: Resultsmentioning

confidence: 99%

Efficient near infrared light emitting electrochemical cell (NIR-LEEC) based on new binuclear ruthenium phenanthroimidazole exhibiting desired charge carrier dynamics

Bideh

Shahroosvand

2017

Sci Rep

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Near-infrared light-emitting electrochemical cell (NIR-LEEC) has emerged as a new and promising lighting sourcewhich could serve as low-cost alternatives in NIR light-emitting sources which are typically expensive. LECs were also shown advantages such as light weight, simplicity and low operation voltages. However, only a few examples of NIR-LEEC are reported in which external quantum efficiency(EQE) of devices limited to 0.1%. Here, we report, efficient NIR-LEEC based of two novel binuclear ruthenium phenanthroimidzole complex which differ by employing the type of ancillary ligand including 2, 2′bipyridine (bpy) (B1) and 4, 4′ dimethyl bpy (B2) that realize maximum EQE of 0.14 and 0.68% and extremely long excited state lifetimes of 220 and 374 ns for thin film were estimated, respectively, indicating that influences of substitution on ancillary ligand. Moreover, this substitution dramatically influences other electroluminescence metrics including decreasing turn on voltage from 4.5 to 3.1 V, increasing maximum luminance (Lmax) from 193to 742 cd.m−2 and increasing lifetime from 539 to 1104 second, which are the best value among the binuclear ruthenium polypyridyl complexes to date.

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“…After the initial light emission, the luminescence is at 3 V. The key device parameters for complexes 1 – 3 are summarized in Table . Although 2 shows lower values of current density (1490 A/m 2 ) and luminescence (524 cd/m 2 ) when compared to 3 , it should be noted that examples of LECs based on dinuclear Ru(II) complexes are quite rare, ,− and the highest EQE of a deep-red LEC fabricated from a binuclear Ru(II) complex till date is only 0.013% . The EQE of 2 is 0.62%, which is 7% higher than its mononuclear counterpart 1 , which is one of the best values amongst dinuclear Ru(II) polypyridyl complexes till date with the same device configuration.…”

Section: Resultsmentioning

confidence: 93%

Two in One: A Dinuclear Ru(II) Complex for Deep-Red Light-Emitting Electrochemical Cells and as an Electrochemiluminescence Probe for Organophosphorus Pesticides

et al. 2021

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The emissive properties of two Ru(II) complexes, [Ru(dmbipy)2L1][PF6]2 (1) and [Ru2(dmbipy)4L2][PF6]4 (2), (where L1 and L2 are π-extended phenanthroline-based ligands and dmbipy = 4,4′-dimethyl-2,2′-bipyridine) have been explored for dual applications, namely, deep-red light-emitting electrochemical cells (LECs) and electrochemiluminescence (ECL) sensors for the detection of organophosphorus pesticides (OPs) that include chlorpyrifos (CPS). A simple single-layer deep-red LEC device comprising 2 is reported that outperforms both its mononuclear derivative 1 and all previously reported dinuclear LECs, with a maximum brightness of 524 cd/m2, an external quantum efficiency of 0.62%, and a turn-on voltage of 3.2 V. Optoelectronic studies reveal that the ECL response of 2 is improved when compared to its mononuclear counterpart 1 and benchmark [Ru(bipy)3]2+ (3). Modified glassy carbon electrodes coated with 2 are highly sensitive deep-red ECL sensors that facilitate the detection of CPS directly from river water and fruit samples without any complex pretreatment steps, operating over a broad logarithmic concentration range, with a low detection limit.

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Electroluminescence from single-layer thin-film devices based on three binuclear Ru(II) complexes with different length of flexible bridges

Cited by 6 publications

References 52 publications

An efficient heterodinuclear Ir(iii)/Pt(ii) complex: synthesis, photophysics and application in light-emitting electrochemical cells

An efficient heterodinuclear Ir(iii)/Pt(ii) complex: synthesis, photophysics and application in light-emitting electrochemical cells

Efficient near infrared light emitting electrochemical cell (NIR-LEEC) based on new binuclear ruthenium phenanthroimidazole exhibiting desired charge carrier dynamics

Two in One: A Dinuclear Ru(II) Complex for Deep-Red Light-Emitting Electrochemical Cells and as an Electrochemiluminescence Probe for Organophosphorus Pesticides

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