Orange–Yellow Phosphorescent Iridium(<scp>III</scp>) Complex for Solution‐processed Organic Light‐Emitting Diodes: Structural, Optical and Electroluminescent Properties of Bis(2‐phenylbenzothiazole)[2‐(2‐hydroxyphenyl)benzothiazole]iridium(<scp>III</scp>)

Kang, Sung Kwon; Jeon, Jinsil; Jin, Sung‐Ho; Kim, Young-Inn

doi:10.1002/bkcs.11144

Cited by 12 publications

(1 citation statement)

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“…The redox behaviour of compounds 7a and 7b was investigated by cyclic Eg abs = 1240/onset abs (2) [40][41][42] The optical energy gap (Eg o ) was higher than the electrochemical energy gap (Eg e ) for compounds 7a and 7b. The oxidation and reduction potentials and the HOMO-LUMO energy levels of both compounds are summarised in Table 2 and…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

Synthesis of novel multifunctional carbazole based molecules and their thermal, electrochemical and optical properties

Altınölçek¹,

Battal²,

Tavaslı³

et al. 2020

Preprint

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Two novel carbazole-based compounds 7a and 7b were synthesised as potential candidates for application in organic electronics. The materials were fully characterised by NMR spectroscopy, mass spectrometry, FT-IR, thermogravimetric analysis, differential scanning calorimetry, cyclic voltammetry, and absorption and emission spectroscopy. Compounds 7a and 7b, both of which were amorphous solids, were stable up to 291oC and 307oC, respectively. Compounds 7a and 7b show three distinctive absorption bands: high and mid energy bands due to locally excited (LE) transitions and low energy bands due to intramolecular charge transfer (ICT) transitions. In dichloromethane solutions compounds 7a and 7b gave emission maxima at 561 nm and 482 nm with quantum efficiencies of 5.4% and 97.4% ± 10%, respectively. At positive potential, compounds 7a and 7b gave two different oxidation peaks, respectively: quasi-reversible at 0.55 V and 0.71 V, and reversible at 0.84 V and 0.99 V. At negative potentials, compounds 7a and 7b only exhibited an irreversible reduction peak at -1.86 V and -1.93 V, respectively.

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Section: Electrochemical Propertiesmentioning

confidence: 99%