A Comparison of Different A-, A-B-, and B-Site Incorporated in (Ba_0.5Sr_0.5)TiO₃ on Photocatalytic Application

Table 3

Indirect band gap, phonon energy, and percentage of PL emissions of BST catalysts.

Sample	Indirect band gap; (eV)	Phonon emissions energy; (eV)	Phonon absorption energy; (meV)	Nonradiative energy; (eV)	PL emissions (%)
					Violet		Blue	Green		Yellow
					≈3.16	≈2.95	≈2.76	≈2.55	≈2.35	≈1.94
					(eV)
BST	3.10	0.66	60.26	0.72	32.83	18.85	17.19	10.49	12.17	8.46
A-BST	3.06	0.66	61.72	0.72	30.76	27.21	21.92	12.50	5.29	2.32
A-B-BST	3.10	0.68	86.71	0.77	25.55	27.72	24.13	14.36	5.53	2.71
B-BST	3.05	0.62	135.77	0.76	27.77	14.06	28.53	11.10	7.43	9.11