20.2: Ultra-Bright, Highly Efficient, Low Roll-Off Inverted Quantum-Dot Light Emitting Devices (QLEDs)

Publication Type:

Journal Article

Source:

SID Symposium Digest of Technical Papers, Wiley Online Library, Volume 46, Issue 1, p.270-273 (2015)

ISBN:

2168-0159

Keywords:

2015, Cs2CO3, inverted device structure, Light-emitting diodes, low efficiency roll off, quantum dot, Record brightness, zinc oxide nanoparticles

Abstract:

We report an ultra-bright, highly efficient, low roll-off, inverted quantum dot-based red light emitting device (QLED) using
solution-processed zinc oxide nanoparticles and cesium carbonate films as
the electron injection and hole blocking layers, respectively. Record
luminance of 165,000 Cd/m2 has been obtained at a current density of 1000
mA/cm2 with a low driving voltage of 5.8 V for deep red device with CIE
coordinates of (0.69, 0.31).