A white OLED based on DPVBi blue light emitting host and DCJTB red dopant

Solution-processed white organic light-emitting devices based on small-molecule materials

“…Therefore doping of NPB into PVK can partially improve hole injection and transport in HTL. When 20% NPB was doped into PVK, the luminance and efficiency of our devices were significantly improved and were comparable with vacuum-deposited devices based on the same light-emitting materials [3,23]. However, the device performance still has room for improvement if we can dope highly efficient fluorescent dyes into the co-host of DPVBi and TPD.…”

“…As is well known, small-molecule-based WOLEDs were extensively studied because we can dope one or more dopants into the host materials [2,3] or combining emission from different layers [4][5][6]. However, the process of doping two or more dopants into the host material by vacuum evaporation is quite complex and time-consuming, which limits the commercial application of WOLEDs.…”

Single emitting layer white organic light-emitting device with high color stability to applied voltage

“…2). The injected electrons are therefore easily trapped by the rubrene [9]. The second explanation is that there is a significant overlap between the emission spectrum of TBPe (464 nm and 490 nm) and the absorption spectrum of rubrene (460 nm, 490 nm and 534 nm), so energy can be transferred by the Fö rster process.…”

High stability white organic light-emitting diode fabricated with the deposition of solvent premixed sources

“…The luminance of the dual-wavelength WOLED was slightly higher than that of the tri-wavelength WOLED; however, a high stability in the current efficiency was observed for both the dual-and triwavelength WOLEDs. Table 2 shows the EL properties of the single-EML WOLEDs [4,24,[26][27][28][29][30][31]. These devices prepared using fluorescence and phosphorescence emitters were fabricated by spin-coating and vapor deposition from a variety of powder sources or a solvent premixed mixture.…”

“…The unique advantages of WOLEDs are flexibility, fast response, low cost, and high contrast [1][2][3]. They also offer attractive features of a simple manufacturing process and high efficiency [4]. To further enhance the efficiency of WOLEDs, many approaches have been reported; these include the use of light extraction/outcoupling layers [5], use of smart device configurations [6][7][8][9], and development of high-performance electroluminescence (EL) materials [10].…”