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High‐efficiency quantum dot light‐emitting diodes with blue cadmium‐free quantum dots
Author(s) -
Ryowa Tatsuya,
Ishida Takeshi,
Sakakibara Yusuke,
Kitano Keisuke,
Ueda Masaya,
Izumi Makoto,
Ogura Yuko,
Tanaka Masanori,
Nikata Soichiro,
Watanabe Mayuko,
Takasaki Mikihiro,
Itoh Tetsuji,
Miyanaga Akiharu
Publication year - 2020
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1002/jsid.896
Subject(s) - quantum dot , cadmium selenide , optoelectronics , gamut , light emitting diode , materials science , electroluminescence , quantum efficiency , diode , zinc selenide , nanocrystal , wavelength , optics , nanotechnology , physics , layer (electronics)
We report outstanding electroluminescence properties of high‐efficiency blue cadmium‐free quantum dot light‐emitting diodes (QD‐LED). External quantum efficiency (EQE) of 14.7% was achieved for QD‐LED emitting at 428 nm. Furthermore, we developed high‐efficiency and narrow wavelength emission zinc selenide (ZnSe) nanocrystals emitting at 445 nm and achieved QD‐LED with an EQE of 10.7%. These new QDs have great potential to be used in next‐generation QD‐LED display with wide color gamut.