biostudies-literatureUnknown9(1)Lin TNational Key Research and Development Program of ChinaIn order to solve the interface issues in solution deposition of multilayer OLED devices, a blended host concept was developed and applied to both spin-coating and inkjet printing of phosphorescent OLEDs. The blended host consists of 1,3-bis(carbazolyl)benzene (mCP) and1,3,5-tri(phenyl-2-benzimidazoly)-benzene (TPBi). Maximum current efficiency (CE) of 24.2 cd A^-1 and external quantum efficiency (EQE) of 7.0% have been achieved for spin-coated device. Maximum CE and EQE of 23.0 cd A^-1 and 6.7% have been achieved for inkjet printed device. The films deposited by printing and spin-casting were further researched to explore the effect of those different processing methods on device performance.Scientific reports6845https://www.ebi.ac.uk/biostudies/studies/S-EPMC6497667biostudies-literatureBlended host ink for solution processing high performance phosphorescent OLEDs.PMC6497667Zhang DChu BHu YLin TCui ZMu WSu ZSun XSun YfalseBlended host ink for solution processing high performance phosphorescent OLEDs.In order to solve the interface issues in solution deposition of multilayer OLED devices, a blended host concept was developed and applied to both spin-coating and inkjet printing of phosphorescent OLEDs. The blended host consists of 1,3-bis(carbazolyl)benzene (mCP) and1,3,5-tri(phenyl-2-benzimidazoly)-benzene (TPBi). Maximum current efficiency (CE) of 24.2 cd A^-1 and external quantum efficiency (EQE) of 7.0% have been achieved for spin-coated device. Maximum CE and EQE of 23.0 cd A^-1 and 6.7% have been achieved for inkjet printed device. The films deposited by printing and spin-casting were further researched to explore the effect of those different processing methods on device performance.2019-01-01T00:00:00Z2019 May2025-04-18T15:28:43.228Z2019-06-06T23:26:38ZS-EPMC64976673104876410.1038/s41598-019-43359-4