This course covers the scientifically intriguing and industry-relevant optoelectronic devices, including lasers, solar cells, light-emitting diodes (LED), and photodetectors. The course is designed to walk the students through the device working principles, significant components of each device, state of the art of each device, and outlook of these device developments. The course aims to equip the students with necessary device knowledge for future careers on optoelectronic devices, in both academia and industry. There are no prerequisite courses for this course, though some backgrounds in semiconductors and pn junctions will be helpful.