[Retracted] Influence of L-Tryptophan on Growth and Optical Properties of PbS Nanocrystalline Thin Films

Table 1

Experimental values of for PbS-PbS-T thin films.

Sample	(eV)
PbS	1.40
PbS-T5	1.50
PbS-T10	1.52
PbS-T15	1.59
PbS-T20	1.78
PbS-T30	2.10