Details

Autor(en) / Beteiligte

• Chen, Kuo-Ju
• Lin, Chien-Chung
• Han, Hau-Vei
• Lee, Chia-Yu
• Chien, Shih-Hsuan
• Wang, Kuan-Yu
• Chiu, Sheng-Huan
• Tu, Zong-Yi
• Li, Jie-Ru
• Chen, Teng-Ming
• Li, Xiuling
• Shih, Min-Hsiung
• Kuo, Hao-Chung

Titel

Wide-Range Correlated Color Temperature Light Generation From Resonant Cavity Hybrid Quantum Dot Light-Emitting Diodes

Ist Teil von

• IEEE journal of selected topics in quantum electronics, 2015-07, Vol.21 (4), p.23-29

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2015

Quelle

IEEE Electronic Library (IEL)

Beschreibungen/Notizen

• This study presents extremely uniform colloidal quantum dot white light-emitting diodes (QD-WLEDs) that demonstrate a high color rendering index (CRI) and correlated color temperatures (CCTs) ranging from 2500 to 4500 K. Experimental results indicate that the structure of the distributed Bragg reflector (DBR) containing a stopband in the UV region enhances the intensity output of both monochromatic QD-LEDs and QD-WLEDs by reflecting the unconverted UV light back onto the package to excite the QDs further. Furthermore, the angular CCT uniformity of the QD-WLEDs also improved considerably because of the dependence of the DBR structure on the incident angle. The angular CCT deviation in the range of -70° to 70° decreased to 39 K and the CRI of the WLED is higher than 90. The high-CRI and uniform angular CCT QD-WLED containing the DBR demonstrates potential applicability as the lighting source of next-generation display devices and solid-state lighting.