Analysis and characterization of ZnO QDs in hybrid device

Abstract

Recent advances in nanomaterials have been led by new synthetic methods that provide control over size, morphology and crystal quality of material. In the present study, the effect of ultrasonic waves on characteristics and crystal quality of ZnO quantum dots (QDs) is evaluated by comparing two samples prepared by sonochemical and conventional methods. Ultrasonic waves cause to the production of smaller QDs in a fast time scale with improved morphology and crystal quality. Also, the growth of ZnO QDs is tried to discuss by study of crystal growth kinetic. Then, the performance of two hybrid devices constituted from poly (N-vinylcarbazol) and two types of ZnO is examined by current voltage curves. The device fabricated from ultrasonic-prepared ZnO shows larger photocurrent density indicating the enhancement of its applicability to be used as UV light switches or photodetectors.