| Summary: | 碩士 === 國立中央大學 === 能源工程研究所 === 107 === Recently, flexible organic light-emitting diodes (FOLEDs) have drawn attentions because of the good performance in flexibility, stable reliability and high luminosity. FOLEDs currently are used in not only lighting but also displays, such as panels in cell phones, televisions and other bendable wearable electronics. FOLEDs are fabricated through stacking thin films, and white FOLEDs (FWOLEDs) can be achieved by stacking sky-blue and orange-red organic light-emitting layers. When it comes to lighting, FWOLEDs are expected to meet performance metrics, such as luminance and correlated color temperature.
The purpose of this research is to establish optical models for the FWOLEDs, we used simulate to investigate FWOLEDs by Monte Carlo ray-tracing simulation (LightTools 8.6, Synopsys Inc.). First, we construct optical models with different bent radii and analyze their effects on FWOLEDs. In this study, we simulate not only luminance and color coordinate but also correlated color temperature and color rendering index. After realized FWOLEDs device, we measured the current efficiency, power efficiency and EL spectra of device, such as the spectrometer with a multisource meter and the handy-type luminance meter to feedback the simulation models. Finally, we prove the accuracy of the simulation models by comparing the experimental and simulated results and analyzed the spectrum and angular distribution of the luminance on FWOLEDs with different radii by optical simulation.
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