کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5376444 | 1504321 | 2007 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electromodulation of photoluminescence in vacuum-evaporated films of fac-tris(2-phenylpyridine)iridium(III)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Electromodulation of photoluminescence (EML) has been investigated in vacuum-evaporated films of Ir(ppy)3 (tris(2-phenylpyridine)iridium) commonly used as a phosphorescent emitter in organic light-emitting diodes. The quenching of photoluminescence up to 30% is observed in the external electric field applied to sandwich cells Al/Ir(ppy)3/Al/glass. The electric field characteristics, the emission and excitation spectra of EML signals are interpreted in terms of field-induced dissociation of excited states into free and/or trapped charge carriers according to the Onsager theory. In addition, the existence of internal electric fields of (1-3)Â ÃÂ 105Â V/cm in Ir(ppy)3 films is inferred from the (1Ï)EML signals measured at the first harmonic of the applied electric field frequency, in accordance with previous electroabsorption results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 337, Issues 1â3, 16 August 2007, Pages 151-160
Journal: Chemical Physics - Volume 337, Issues 1â3, 16 August 2007, Pages 151-160
نویسندگان
Waldemar Stampor, Jakub MÄżyk,