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P‐111: Red, Green, and Blue Quantum Rod Based Electroluminescent Light‐Emitting Diodes
Author(s) -
Mallem Kumar,
Prodanov Maksym F.,
Gupta Swadesh K.,
Tam Bryan Siu Ting,
Vashchenko Valerii V.,
Srivastava Abhishek K.
Publication year - 2020
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.14245
Subject(s) - optoelectronics , light emitting diode , quantum efficiency , diode , electroluminescence , materials science , green light , quantum dot , luminance , gamut , optics , blue light , layer (electronics) , physics , nanotechnology
Quantum dot light emitting diodes (QLEDs) emerges as a potential display technology due to its ultra‐saturated colors, small turn on voltage (V on ) and high efficiency (ŋ). However, the internal quantum efficiency (IQE) of QLED devices nearly reach its ideal level, and leave light outcoupling as the only possible way to improve the external quantum efficiency (EQE). This might need a different shape of the core shell, device structure and re‐optimization of the device. In this paper, we synthesized CdSe with CdS/ZnS based red, blue and green quantum rods (QRs) and fabricated electroluminescent QRs light emitting diodes (QRLEDs), this is the first study to report for the blue QRLEDs. The solution processed zinc oxide (ZnO) nano‐particles (NP) are used as an electron transport layer. The maximum luminance and EQE values of the devices are 1288, 420 and 13 cd/m 2 and 5.7% and 0.18% and 0.093 %, for the red, green and blue LEDs, respectively. This kind of new QRLEDs shows a great potential for the use of next generation high color gamut display.