Fenenko Larysa, Shao Guang, Orita Akihiro, Yahiro Masayuki, Otera Junzo, Svechnikov Sergei, Adachi Chihaya
Center for Future Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.
Chem Commun (Camb). 2007 Jun 14(22):2278-80. doi: 10.1039/b700466d. Epub 2007 Mar 5.
We found that a phenylene ethynylene derivative, 1,4-bis(4-(phenylethynyl)phenylethynyl)benzene (BPPB), provides very high photoluminescence efficiency both in solution (Phi(PL) = 95 +/- 3%) and thin films (Phi(PL) = 71 +/- 3%); further, we observed blue electroluminescence (EL) of lambda(EL(max)) approximately 470 and 510 nm with an external EL efficiency of eta(EL) approximately 0.53% and maximum luminance of approximately 70000 cd m(-2) at current density of approximately 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.
我们发现，一种亚苯基乙炔衍生物，1,4 - 双（4 - （苯乙炔基）苯乙炔基）苯（BPPB），在溶液中（Φ(PL) = 95 ± 3%）和薄膜中（Φ(PL) = 71 ± 3%）均具有非常高的光致发光效率；此外，我们观察到以BPPB作为发射体时，在电流密度约为2 A cm⁻²的情况下，λ(EL(max))约为470和510 nm的蓝色电致发光（EL），外部EL效率η(EL)约为0.53%，最大亮度约为70000 cd m⁻²；我们还确定BPPB在有机发光二极管中充当空穴传输层。
