CCT– and CRI–tuning of white light–emitting diodes using three–dimensional non–close–packed colloidal photonic crystals with photonic stopbands

Chun Feng Lai, Chung Chieh Chang, Ming Jye Wang, Mau Kuen Wu

Research output: Contribution to journalArticle

15 Citations (Scopus)


This study exhibited the correlated color temperature (CCT)- and color-rendering index (CRI)-tuning behavior of light emission from white light-emitting diodes (WLEDs) using three-dimensional non-close-packed (3D NCP) colloidal photonic crystals (CPhCs). The CCT of approximately 5300 K (characteristic of cold WLEDs) of white light propagated through the NCP CPhCs dropped to 3000 K (characteristic of warm WLEDs) because of the photonic stop-bands based on the photonic band structures of NCP CPhCs. This study successfully developed a novel technique that introduces lower-cost CCT- and CRI-tuning cold WLEDs with a CRI of over 90 that of warm WLEDs by using 3D NCP CPhCs.

Original languageEnglish
Pages (from-to)A687-A694
JournalOptics Express
Issue number104
Publication statusPublished - Jul 1 2013
Externally publishedYes


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this