Bistability and improved hole injection in organic bistable light-emitting diodes using a quantum dot embedded hole transport layer

Organic bistable light-emitting diodes (OBLED) were developed by using a quantum dot embedded hole transport layer in the organic light-emitting diodes. The driving voltage of the OBLED was decreased due to the good hole transport properties of quantum dot embedded hole transport layer and the OBLED also showed bistability at negative bias due to the switching behavior of the quantum dot based hole transport layer. The origin for the switching behavior of the OBLED was confirmed by fabricating organic bistable device with the quantum dot embedded hole transport layer.