Enhanced Photomultiplication of Organic Photodetectors via Phosphorescent Material Incorporation

Photomultiplication organic photodetectors (PM-OPDs) were successfully constructed with a planar structure of PBDB-T/ITIC-Br layers as active layer sandwiched by electrodes. Some isolated electron traps PBDB-T/ITIC-Br /PBDB-T near the top surface...

Efficient green fluorescent organic light-emitting diodes with extended lifetimes by exploiting an iridium complex as a sensitizer

Carriers and excitons in fluorescent organic light-emitting diodes (OLEDs) are modulated by utilizing a phosphorescent material as a sensitizer.

An ultralong room-temperature phosphorescent material based on the combination of small singlet–triplet splitting energy and H-aggregation

Compound AI-N-Cz exhibited ultralong RTP with a lifetime of 775 ms due to the combination of small ΔEST and H-aggregation.

Study of the white organic electroluminescent devices performance based on phosphorescent dyes FCNIrPic

Two kinds of high efficient white-light OLED devices based on blue phosphorescent material FCNIrPic(Bis(3,5-difluoro-4-cyano-2-(2-pyridyl)phenyl-(2-carboxypyridyl) iridium(III))) were fabricated by means of the principle of whitening with blue-yellow complementary colors. Firstly, white-light device A was fabricated by the hybrid of yellow fluorescent material Rubrene and blue-light layer of phosphorescent FCNIrPic. The device structure is ITO/m-MTDATA/NPB/Rub/MCP: FCNIrPiC/Alq3/LiF/Al. The structure of the device is optimized by adjusting the thickness of phosphorescent doping layer MCP: FCNIrPiC. When the thickness of blue layer is 8 nm, the device has the best performance. The maximum brightness is 13240 cd/m2 and the maximum current efficiency is 3.5 cd/A. The color coordinates are near (0.33, 0.37) and change little with the increase in voltage. Secondly, white OLED device B with double phosphorescent layer was fabricated by yellow phosphorescent PO-01 and FCNIrpic. The device structure is ITO/m-MTDATA/NPB/CBP: PO-01/MCP: FCNIrpic/Alq3/LiF/Al. White light was obtained by adjusting the thickness of blue layer. When the thickness of blue layer is 10 nm, the device has the best performance. The maximum current efficiency is 9.8 cd/A and the maximum brightness is 11 400 cd/m2. The color coordinates are near (0.33, 0.35).

Inkjet printing high luminance phosphorescent OLED based on m-MTDATA:TPBi host

In organic light-emitting devices (OLEDs), the high performance of devices depends on balanced charge transfer in emitting layer (EML). However, the balance charge transfer is hard to achieve in the single host material-based EML. In this work, a high luminance co-host based OLEDs is printed. In detail, green phosphorescent material tris[2-(p-tolyl)pyridine]iridium(III) [Formula: see text] is used as dopant, and a hole-transporting material [Formula: see text]-tris[3-methy-lphenyl(phenyl)amino]-triphenylamine (m-MTDATA) blended with an electron-transporting material 1,3,5-tris(phenyl-2-benzimidazolyl)-benzene (TPBi) as co-host. As a result, the optimized printing co-host OLEDs with 10 wt.% [Formula: see text] shows a maximum luminance of [Formula: see text], which is much higher than the CDBP counterpart.