Packaging efficiency in phosphor-converted white LEDs and its impact to the limit of luminous efficacy

Journal of Solid State Lighting

Table 1 Calculation of the limit of luminous efficacy with different bases and all the related parameters and recipes

CCT	*Δuv*	CRI	LER	LE^a	LE^b	Phosphor recipe
7032	0.009	71	327	228	202	YAG(Y)
6506	0.013	70	338	234	207	YAG(Y)
(6538)	0.039	62	372	258	228	YAG(G)
6018	0.017	68	350	241	212	YAG(Y)
(6013)	0.046	60	392	270	237	YAG(G)
(5539)	0.023	66	366	249	218	YAG(Y)
(5519)	0.055	57	417	283	247	YAG(G)
5500	0.000	83	298	200	174	YAG(Y)+Nitride(R)
(5021)	0.067	46	454	303	259	YAG(G)
5000	0.000	84	295	195	167	YAG(Y)+Nitride(R)
(4980)	0.033	63	392	263	225	YAG(Y)
(4892)	0.071	29	466	308	263	YAG(G)
4500	0.000	86	291	190	162	YAG(Y)+Nitride(R)
(4501)	0.045	60	426	280	239	YAG(Y)
(4208)	0.056	34	458	296	252	YAG(Y)
4200	0.000	88	286	185	158	YAG(Y)+Nitride(R)

^aLuminous efficacy with counting Stokes loss only. ^bLuminous efficacy with counting Stokes loss, 4% phosphor quantum loss and geometry loss as a function of the CCT.