Double-layer structured hole injection layer to enhance quantum-dot light-emitting diodes Yu, Jong Hun ; Heo, Su Been ; Kim, Minju ; Yi, Yeonjin ; Kang, Seong Jun Abstract Publication: Thin Solid Films Pub Date: October 2019 DOI: 10.1016/j.tsf.2019.137444 Bibcode: 2019TSF...687m7444Y