Improved color rendering and luminous efficacy in phosphor-converted white light-emitting diodes by use of dual-blue emitting active regions.
Conventional white-light sources suffer from a fundamental trade-off between color rendering index and the luminous efficacy; increasing one generally comes at the expense of the other. We demonstrate through simulation that dual-wavelength blue-emitting active regions in phosphor-converted white light sources maximize the output luminous flux while significantly increasing the color rendering ability. Our results indicate that such improvements can be achieved over a broad range of correlated color temperatures.
Mirhosseini
Roya
R
Department of Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.
Schubert
Martin F
MF
Chhajed
Sameer
S
Cho
Jaehee
J
Kim
Jong Kyu
JK
Schubert
E Fred
EF
D003116:Color; D003198:Computer Simulation; D004867:Equipment Design; D008027:Light; D008029:Lighting / Q000379:methods; D015233:Models, Statistical; D055095:Optics and Photonics; D010758:Phosphorus / Q000737:chemistry; D013696:Temperature
D010758:Phosphorus