Hot Exciton: Enabling Non-Doped Blue OLEDs with Efficiency Exceeding 20% (IMAGE) Science China Press Caption Doped vs non-doped OLED device architecture and non-doped blue emission Credit ©Science China Press Usage Restrictions Use with credit. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.