In this book, we introduce capability of solution process based nanotechnology to realize optoelectronic devices and systems operating in room temperature to open a new way to realize all-optical engineering. Especially, we concentrate on optoelectronics IR and UV sensors using solution process in this book. For doing these tasks, photoconductive sensors using core-shell colloidal quantum dots are used. A novel perspective of this book is presentation of room temperature IR and UV photodetectors as well as low cost and easy to fabricate in each research centers and universities.