Efficient white phosphorescent organic light‐emitting diodes for solid‐state lighting applications using an exciton‐confining emissive‐layer structure

Solution-processed flexible blue organic light emitting diodes using graphene anode

“…ITO was conventionally used as a transparent conductive electrode because of its high electrical conductivity and optical transparency. However, the rising price of indium, the brittle properties and degradation of optoelectronic performance over time due to indium diffusion limited the development of OLEDs on flexible substrates [2][3][4][5]. For flexible device applications, as a substitution for ITO, graphene has been identified as a strong potential material for transparent and flexible conductor due to its mechanical robustness, high charge carrier mobility, high optical transparency and high flexibility [6][7][8][9][10].…”

39.1: Invited Paper: Efficient Color Tunable Light Sources by The Combination of a Transparent and a Non‐Transparent Organic Light Emitting Diodes

“…Power efficiencies of OLEDs have already outperformed those of incandescent bulbs and closed to those of fluorescent lamps. [1][2][3][4] For future environment responsive lighting systems, we believe that color tunable OLED light sources will be needed. Obviously, one possible way to fabricate color tunable OLEDs is line by line addressing with different colors.…”

Dependence of Light-Emitting Characteristics of Blue Phosphorescent Organic Light-Emitting Diodes on Electron Injection and Transport Materials

“…Enhanced blue PHOLED performances achieved through the development of carbazole-, trizine-, pridine-, or phenylsilane-type wide band-gap materials have also been reported [15]- [20]. Triplet exciton confinement in the emissive layer (EML) of PHOLEDs has been known as one of the key factors affecting the device characteristics [14], [18], [21], [22]. Since the blue electro-phosphorescent dopants have high triplet energy (T ) levels, wideband gap hole transporting materials and electron transporting materials with high T levels are required [12]- [14], [23]- [26].…”