Flexible Organic Electroluminescent Device Simulator Design And Implementation Based On Microcavity Structure Optimization

A new type of flat panel display and solid-state light source, namely, organiclight-emitting device (OLED), is getting more and more considerations during the lastdecades, because the fabrication of flexible OLEDs (FOLEDs) is feasible. Among theparameters of FOLEDs, the effect of microcavity on the luminance, efficiency, spectravariation and peak intensity of the device which are taken into account in this paper,cannot be avoided. Simulation softwares are efficient tools to investigate themechanisms and operations of different devices. However, a platform to simulateFOLEDs is not available. In this paper, a platform for FOLED simulation wasintroduced, by combining the theory of microcavity, which is described by a parameterM(x). The parameter M(x) was applied to three primary colors to construct an idealsimulation model. The reliability and accuracy of the software are also verified. Themain reseach contents are shown below:1. To investigate the microcavity effect in FOLEDs, the algorithm and plan of thesoftware were proposed. The microcavity effect on the performance of FOLEDs wasdiscussed by incorporating the parameter M(x), and the software and frameworkdiagrams were also obtained.2. Monochrome FOLEDs based on three primary colors were fabricated, and thethe thickness of charge injection layers on the device performance were discussed. Thespectra variation and peak intensity were characterized by luminance, current efficiency,power efficiency and spectra. Different processes were applied according to differentsimulation purposes.3. To verify the effectiveness of the software, we have adjusted the thickness of thehole injection layer to vary the cavity length. By observing the device performance, wefound that the microcavity in red, green and blue devices showed different effect. Bluelight possessed the largest influence, while red light showed the least.In conclusion, this article has studied the micro-cavity structure in OLED. Byintroducing micro-cavity factor M (x) parameter, the three basic color flexible OLEDdevices with microcavity structure were simulated using flexible OLED emulationsoftware. The flexible OLED conducted with a micro-cavity were fabricated and tested,and the effect on microcavity structure has also been analyzed accordingly. By contrasting with confirmatory experiments, it is showing good consistency between thesimulation results from software calculation and experimental results for three colorflexible OLED device with an optimization structure of micro-cavity. Thus, thissoftware has very good functional optimization of layer thickness in flexible OLEDdevices with great practical value.