Material Structure Selection of Solution Blue OLEDs Using a Design of Experiment
A blue small-molecular organic light-emitting diode (SM-OLEDs) based on a solution-process is investigated in this study. Design of experiment (DOE) with response surface methodology (RSM) was applied to optimize the driving voltage and current efficiency of blue SM-OLED devices. The spin-coating speed of the PEDOT: PSS as hole injection layer and the 26DCzPPy: FIrpic as emitting layer were chosen as two main process input factors. Analysis of variance (ANOVA) was adopted to identify significant factors before regression models were obtained. The optimal material structure was determined by minimizing and maximizing a desirability function relating to selected critical quality characteristics including the driving voltage and current efficiency, respectively.
KeywordsSolution-process Blue OLEDs Design of experiments Stamping process
The authors would like to acknowledge the financial support of the National Science Council of the Republic of China, project NSC-102-2221-E-150-066-MY2 and NSC-103-2622-E-150-018-CC3.