Promise to electrically pumped colloidal quantum dot lasers

Comparison of QD structures and the device architectures for electrically driven lasers

The laser has been recognized as one of the most successful and significant technological achievements of the 20th century. Undoubtedly, its applications are versatile, ranging from mundane tasks to cutting-edge scientific research, e.g., displays, lighting, optical communications, remote sensing, and medical treatments. Thus, it is believed that laser technology will continue to shape the world and change our way of life. Among all laser technologies, solution-processed colloidal quantum dot (CQD) laser diodes have attracted intensive attention due to their low cost, flexibility, simple processing, and ease of integration.