Abstract
A high color rendering index (CRI) white organic light-emitting devices with photobiological safety is demonstrated. The effect of the active layer thickness on CRI and blue light hazard is demonstrated. The optimized device shows a high general CRI of 97, a special CRI R 9 of 94, and a power efficiency of 15.2 lm/W. The correlated color temperature is 2161. The device could be classified into low risk group at ~2000 cd/m 2 , which is proved to be safe for our eyes and could be applied to indoor illumination.
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