The equilibria and conversions between three excited states: the LE state and two charge transfer states, in twisted pyrene-substituted tridurylboranes
The equilibria and conversions between three excited states: the LE state and two charge transfer states, in twisted pyrene-substituted tridurylboranes
Thermodynamics and Conformations in the Formation of Excited States and Their Interconversions for Twisted Donor-Substituted Tridurylboranes
作者:Mao Mao、Ming-Guang Ren、Qin-Hua Song
DOI:10.1002/chem.201201719
日期:2012.11.26
state conversion is opposite to the viscosity effect, and temperature effects derive from its resulting changes of polarity and viscosity. For example, the increase of the polarity of the solvent results in excited‐state conversions from the LE state to the ICT state, and/or from the ICT to the TICT state, and an increased viscosity leads to the opposite conversions. On the basis of electrochemical
Boosting photoluminescence quantum yields of triarylboron/phenoxazine hybrids <i>via</i> incorporation of cyano groups and their applications as TADF emitters for high-performance solution-processed OLEDs
作者:Yuan Liu、Hong Huang、Tao Zhou、Kailong Wu、Minrong Zhu、Jie Yu、Guohua Xie、Chuluo Yang
DOI:10.1039/c9tc00538b
日期:——
triarylboron/phenoxazine hybrids, and the resulting emitters not only exhibited distinct thermallyactivateddelayedfluorescence (TADF) characteristics but also achieved a remarkable improvement in the photoluminescence quantum yields (PLQYs). The PLQYs of TB-1PXZ2CN and TB-2PXZ1CN are 0.67 and 0.75, which are 5.6 and 1.6 times higher than those of the respective non-cyano counterparts. Employing the two TADF
将氰基基团引入三芳基硼/吩恶嗪杂化物中,得到的发射体不仅表现出独特的热激活延迟荧光(TADF)特性,而且在光致发光量子产率(PLQYs)方面也取得了显着改善。的PLQYs TB-1PXZ2CN和TB-2PXZ1CN是0.67和0.75,其比相应的非氰基对应物更高的5.6倍和1.6倍。在溶液处理的有机发光二极管中使用两个TADF发射器,分别实现了9.7%和11.4%的外部量子效率(EQE)。值得注意的是,在2000 cd m -2的亮度下,EQE保持高达8.9%和10.2%的高效率,分别下降了8%和11%。
The equilibria and conversions between three excited states: the LE state and two charge transfer states, in twisted pyrene-substituted tridurylboranes
作者:Ming-Guang Ren、Mao Mao、Qin-Hua Song
DOI:10.1039/c2cc17663g
日期:——
Excited-state conversions were observed from a series of twisted pyrene-substituted tridurylboranes, corresponding to a locally excited (LE) state, a more planar charge transfer (CT) state with a higher fluorescence quantum efficiency, and a more twisted CT state.