title: Multilayer Transfer Printing for Pixelated, Multicolor Quantum Dot Light-Emitting Diodes.
abstract: 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. Results indicate that zinc oxide (ZnO) and titanium dioxide (TiO2) can serve effectively as electron transport layers (ETLs) for red and green/blue QD LEDs, respectively. 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. This strategy allows cointegration of devices with heterogeneous energy band diagrams, in a parallelized scheme that offers potential for high throughput and practical use.
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Bong Hoon
authors.initials: BH
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Sooji
authors.initials: S
authors.lastname: Nam
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Nuri
authors.initials: N
authors.lastname: Oh
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Seong-Yong
authors.initials: SY
authors.lastname: Cho
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Ki Jun
authors.initials: KJ
authors.lastname: Yu
authors.affiliation: Weldon School of Biomedical Engineering, School of Mechanical Engineering, The Center for Implantable Devices, and Birck Nanotechnology Center, Purdue University , West Lafayette, Indiana 47907, United States.
authors.forename: Chi Hwan
authors.initials: CH
authors.lastname: Lee
authors.affiliation: Dow Electronic Materials , 455 Forest Street, Marlborough, Massachusetts 01752, United States.
authors.forename: Jieqian
authors.initials: J
authors.lastname: Zhang
authors.affiliation: The Dow Chemical Company , 2301 North Brazosport Boulevard, Freeport, Texas 77541, United States.
authors.forename: Kishori
authors.initials: K
authors.lastname: Deshpande
authors.affiliation: Dow Electronic Materials , 455 Forest Street, Marlborough, Massachusetts 01752, United States.
authors.forename: Peter
authors.initials: P
authors.lastname: Trefonas
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Jae-Hwan
authors.initials: JH
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Jungyup
authors.initials: J
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Jae Ho
authors.initials: JH
authors.lastname: Shin
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Yongjoon
authors.initials: Y
authors.lastname: Yu
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Jong Bin
authors.initials: JB
authors.lastname: Lim
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Sang M
authors.initials: SM
authors.lastname: Won
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Youn Kyoung
authors.initials: YK
authors.lastname: Cho
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Nam Heon
authors.initials: NH
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Kyung Jin
authors.initials: KJ
authors.lastname: Seo
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Heenam
authors.initials: H
authors.lastname: Lee
authors.affiliation: Center for Neuroscience Imaging Research (CNIR), Institute of Basic Science (IBS); School of Chemical Engineering, Sungkyunkwan University (SKKU) , Suwon 440-746, Korea.
authors.forename: Tae-Il
authors.initials: TI
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Moonsub
authors.initials: M
authors.lastname: Shim
authors.affiliation: Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: John A
authors.initials: JA
authors.lastname: Rogers
keywords: energy band diagram; light-emitting diode; quantum dots; transfer printing