This book discusses the scientific fundamentals and key technological features of Organic Light Emitting Transistors (OLETs). The book compares OLETs to OLEDs in display and sensor applications.

The book also provides a comparative analysis between OLED and OLET devices in order to highlight the fundamental differences in terms of device architecture and working principles. The book also explores the principles of OLET devices, their basic optoelectronic characteristics, the properties of currently available materials, processing and fabrication techniques, and the different approaches adopted to structure the active channel and to control organic and hybrid interfaces.

OLED challenges (namely color gamut, power efficiency, and reliability) are also discussed in this book, and it also examines the photonic properties of OLETs, focusing on the external quantum efficiency, the brightness, the light outcoupling, and emission directionality.