Electrical properties of 1,4-bis(4-(phenylethynyl)phenylethynyl)benzene and its application for organic light emitting diodes
Literature Information
Guang Shao, Akihiro Orita, Masayuki Yahiro, Junzo Otera, Sergei Svechnikov, Chihaya Adachi
We found that a phenylene ethynylene derivative, 1,4-bis(4-(phenylethynyl)phenylethynyl)benzene (BPPB), provides very high photoluminescence efficiency both in solution (ΦPL = 95 ± 3%) and thin films (ΦPL = 71 ± 3%); further, we observed blue electroluminescence (EL) of λEL (max) ∼470 and 510 nm with an external EL efficiency of ηEL ∼0.53% and maximum luminance of ∼70000 cd m−2 at current density of ∼2 A cm−2 with BPPB as an emitter; also we identified that BPPB functions as a hole transport layer in organic light emitting diodes.
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