Multilayer Transfer Printing for Pixelated, Multicolor Quantum Dot Light-Emitting Diodes.Here, we report multilayer stacking of films of quantum dots (QDs) for the purpose of tailoring the energy band alignment between charge transport layers and light emitting layers of different color in quantum dot light-emitting diodes (QD LED) for maximum efficiency in full color operation.  The performance of QD LEDs formed by transfer printing compares favorably to that of conventional devices fabricated by spin-casting.  Optimized selections for each QD layer can be assembled at high yields by transfer printing with sacrificial fluoropolymer thin films to provide low energy surfaces for release, thereby allowing shared common layers for hole injection (HIL) and hole transport (HTL), along with customized ETLs. 
transfer printing
The performance of QD LEDs formed by transfer printing compares favorably to that of conventional devices fabricated by spin-casting. 
spin-casting