Photoluminescence Study of the Influence of Additive Ammonium Hydroxide in Hydrothermally Grown ZnO Nanowires

Table 2 Photoluminescence study of the influence of NH₄OH addition over optical response of ZnO NWs

S. no.	NH₄OH concentration (mM)	I_UV	I_G	I_UV/I_G	Free charge density (/cm³) [5]
1	0	0.61	0.14	4.4	4.3 ± 3.9 × 10¹⁶
2	10	0.33	0.07	4.6	N/A
3	20	0.43	0.1	4.3	8.3 ± 4 × 10¹⁶
4	30	0.75	0.22	3.4	N/A
5	40	0.38	0.27	1.4	2 ± 1 × 10¹⁷
6	50	0.38	0.22	1.7	N/A