Blue mixed host organic light emitting devices

High Efficiency Red Phosphorescent Organic Light-Emitting Diodes with Simple Structure

“…HOMO , LUMO and triplet energy of these host materials are listed in Table 5. The HOMO and LUMO energy levels of bis(10-hydroxybenzo [h] quinolinato)beryllium complex (Bebq 2 ) are reported at 5.5 and 2.8 eV, respectively (S. W. Liu et al 2004). High luminance in OLEDs with Bebq 2 as an emitter was reported by Hamada et al (Hamada et al, 1993).…”

CH⋅⋅⋅π Interaction‐Modulated Solid‐State Packing and Carrier Mobility in Thienyl and Thieno[3,2‐b]Thienyl End‐Capped Distyrylarylene Derivatives

“…[4] Such multifunctional organic materials also include phthalocyanines, [3] oligoacenenes, [5] fullerenes [2,6] , and so on. As one of the most prominent multifunctional materials, distyrylarylene (DSA) derivatives have displayed many excellent properties as: 1) emitting materials in efficient and bright electroluminescence (EL) devices in the blue region, [7][8][9] 2) a blue dopant to improve both EL efficiency and stability of OLEDs, [10][11] 3) active layers in OFET devices, [12][13][14] and 4) fluorescent materials exhibiting aggregation-induced emission (AIE) behavior. [15] However, the crystal structures of DSA derivatives were seldom researched so far, probably owing to their weak interchain interaction and the amorphous nature in the solid state which bring difficulties to grow even millimeter-sized block crystals.…”

Improved performance of mixed single layer top-emission organic light emitting devices using capping layer

“…Actually, the capping effect of dielectric thin films is not simply dependent on the transmittance of the top contact, but rather on the overall performance of the device. Recently, a mixed organic layer OLED has attracted wide attention because it potentially provides an approach to improve the device performance [13][14][15][16][17]. Particularly, Liu et al [18] investigated the carrier mobility in mixed layer and found that it was sensitive to the compositional fraction of organic materials, which presents direct evidences on the role of the mixed layer in these devices.…”