This paper reports a low-temperature thin-film encapsulation (TFE) process based on a low temperature atomic layer deposition ZrO<sub>2</sub> layer for top-emission organic light-emitting devices (TEOLEDs). The barrier characteristics of TFE showed a lower water vapor transmission rate (WVTR) of 2.3 × 10<sup>−3</sup> g/m<sup>2</sup>/day and a longer continuous operation lifetime of 6-folds compared to the device without TFE under identical environmental and driving conditions. Furthermore, the emitting light extraction of the device with barrier layers was improved compared to the bare device. The theoretical calculation data were consistent with the experimental results and showed the potential for designing optimized TFE structures for improving light transmission.
We report on the rough methods for transforming of external quantum
efficiency and power efficiency of organic light-emitting devices (OLEDs). The calculation system based on supposing a perfectly diffuse electroluminescent lambertian surface can be useful for appraising external quantum efficiency and power efficiency in research work. And we set up model of transform for external quantum
efficiency and power efficiency of OLEDs and develop computer program to simulate scaling modulus.