Microwave Synthesized Monodisperse CdS Spheres of Different Size and Color for Solar Cell Applications

Table 1

Particle and crystal sizes of CdS products synthesized from solutions of different pH at 100 or 150°C for 10 or 30 min.

	Particle size (nm)	Crystal size (nm)	White light reflective color	Emission band (nm)	Particle size (nm)	Crystal size (nm)	White light reflective color	Emission band (nm)
	Time
	10 min				30 min
100°C
pH 8.5	117 ± 18	9.2	Green-yellow	492	126 ± 21	9.2	Green-yellow	492
pH 8.7					102 ± 18	9.2	Green-yellow	492
pH 8.8					98 ± 36	9.2	Green-yellow	492
pH 10.8					52 ± 15	9.5	Orange-yellow	530
pH 11.2	Chains	10.0	Orange-yellow	530	40	—	Orange-yellow	530
150°C
pH 8.4	137 ± 28	10.4	Orange-yellow	530
pH 11	Clusters	10.4	Orange-yellow	530

The maximum emission peak after the excitation by the 370 nm UV radiation.