Quantum dot lighting emitting diodes are promising candidates for high efficiency and wide colour gamut displays.

Abstracts:Electroluminscent colloidal quantum dots have the potential to offer saturated colours satisfying the new more demanding REC 2020 (ITU-R-BT 2020) standard. This paper reports our attempt to match the REC 2020 colour co-ordinates with red CdSe/ZnS and CFQD ® and green CFQD ® . We report here red quantum dot based electroluminescent devices (QLEDs) that meet the colour coordinates requirement set by REC2020. We also report the world first dark red CFQD ® (heavy metal free) ((x,y), (0.690, 0.309)) devices. The electroluminescent characteristics of devices from both CdSe/ZnS and cadmium free quantum dots are compared.

Colloidal quantum dots have the potential to offer saturated colours satisfying the new more demanding REC 2020 (ITU-R-BT 2020) standard.We report here red quantum dot based electroluminescent devices (QLEDs) that exceed the colour co-ordinates requirement set by REC2020. We achieved colour co-ordinates of (0.712, 0.288) that exceeds the requirement. By using appropriate device architecture and quantum dot size, we achieved a very high efficiency of 4 cd/A for CIE (x,y) of (0.708, 0.292) meeting the REC 2020 specification. A world record efficiency of 10 cd/A and 5.8 lm/W for CIE (x,y) of (0.695, 0.305) has been achieved by employing a novel hole transporter. 48-3 / P. Kathirgamanathan