Inverted all-inorganic nanorod-based light-emitting diodes via electrophoretic deposition
High performance and high stability in all-inorganic solution processed nanocrystal-based light-emitting diodes (LEDs) are highly attractive for large area devices compared to organic material-based LEDs. In this work, an inverted all-inorganic LED structure is designed to have an easy integration with thin-film transistors. Adopting robust inorganic materials such as Ni1−xO nanoparticle films as a hole transport layer (HTL) is beneficial for the performance of LED. Herein, we have optimized the HTL by introducing Mg into Ni1−xO to bridge the difference in energy offset between the nanorod emissive layer and the HTL, in addition to the advantages of low temperature solubility of Ni1−xO:Mg nanoparticles. Furthermore, CdSe/CdS-based nanorods via electrophoretic deposition (EPD) are amassed in a vertically aligned (VANR) fashion as an emissive layer to facilitate the carrier transportation. Fostering these approaches enabled an EQE of 1.2% of the fabricated device, establishing the viability for further development of efficient and highly stable nanocrystal-based LEDs.
Funding
Electrically pumped all-inorganic LEDs and lasers by colloidal nanorod heterogeneous assembly
Science Foundation Ireland
Find out more...EPSRC-SFI CDT in Photonic Integration and Advanced Data Storage
Science Foundation Ireland
Find out more...EPSRC and SFI Centre for Doctoral Training in Photonic Integration and Advanced Data Storage
Engineering and Physical Sciences Research Council
Find out more...History
Publication
ACS Applied Nano Materials, 2024Publisher
Americal Chemical SocietyOther Funding information
This work was supported by the Science Foundation Ireland (SFI) career development award (SFI 17/CDA/4733), SFI 12/RC/2276_P2, SFI 18/EPSRC-CDT/3585, the Engineer?ing and Physical Sciences Research Council EP/S023321/1, Irish Research Council (IRC) (Grant No. IRCLA/2017/285) and Shenzhen Key Laboratory for Deep Subwavelength Scale Photonics (ZDSYS20220527171201003)Also affiliated with
- Bernal Institute
External identifier
Department or School
- Chemical Sciences
- Physics