Definition of "detectivity"

It should be noted that all of these photoresponse performances such as the photocurrent, the detectivity, and the relative responsivity were quite improved compared to those of photodetectors based only on a single CdTe NW.

2015 August 19, Kwang Heo et al., “Bi-Assisted CdTe/CdS Hierarchical Nanostructure Growth for Photoconductive Applications”, in Nanoscale Research Letters‎, volume 10