High‐efficiency quantum dot light‐emitting diodes with blue cadmium‐free quantum dots
Tatsuya Ryowa, Takeshi Ishida, Yusuke Sakakibara, Keisuke Kitano, Masaya Ueda, Makoto Izumi, Yuko Ogura, Masanori Tanaka, Soichiro Nikata, Mayuko Watanabe, Mikihiro Takasaki, Tetsuji Itoh, Akiharu Miyanaga
Abstract
Abstract 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.
Topics & Concepts
Quantum dotCadmium selenideOptoelectronicsGamutLight-emitting diodeMaterials scienceElectroluminescenceQuantum efficiencyDiodeZinc selenideNanocrystalWavelengthOpticsNanotechnologyPhysicsLayer (electronics)Quantum Dots Synthesis And PropertiesNanocluster Synthesis and ApplicationsChalcogenide Semiconductor Thin Films