Theoretical estimates carried out by Martyniuk et al. [1] in 2008 indicate that the self-assembled quantum dot infrared photodetectors (QDIPs) are suitable for noncryogenic operation, especially in long-wavelength infrared (LWIR) regions. In practice, however, the reduced performance of QDIPs is the result of nonoptimal band structure and technological problems, such as QD size and density control. More recently, the attractive alternative to self-assembled epitaxial QDs has been colloidal quantum dots (CQDs), with better size tunability of the optical features and lower fabrication cost.