title: Improvement of light quality by ZrO(2) film of chip on glass structure white LED.
abstract: A novel combination of blue LED chips, transparent glass substrates and phosphors with PDMS thin film is demonstrated. The flip-chip bonding technology is applied to facilitate this design. The ZrO(2) nanoparticles are also doped into the PDMS film to increase light scattering. The resultant luminous efficiency shows an 11% enhancement when compared to the regular COG device. The variation of correlated color temperature of such devices is also reduced to 132K. In addition to these changes, the surface temperature is reduced from 121°C to 104°C due to good thermal dissipation brought by ZrO(2) nanoparticles.
authors.forename: Huang-Yu
authors.initials: HY
authors.lastname: Lin
authors.forename: Zhi-Ting
authors.initials: ZT
authors.lastname: Ye
authors.forename: Chien-Chung
authors.initials: CC
authors.lastname: Lin
authors.forename: Kuo-Ju
authors.initials: KJ
authors.lastname: Chen
authors.forename: Hsien-Hao
authors.initials: HH
authors.lastname: Tu
authors.forename: Huang-Ming
authors.initials: HM
authors.lastname: Chen
authors.forename: Cheng-Huan
authors.initials: CH
authors.lastname: Chen
authors.forename: Hao-Chung
authors.initials: HC
authors.lastname: Kuo