Tailor-made nanostructures bridging chaos and order for highly efficient white organic light-emitting diodes.

ABSTRACT: Organic light-emitting diodes (OLEDs) suffer from notorious light trapping, resulting in only moderate external quantum efficiencies. Here, we report a facile, scalable, lithography-free method to generate controllable nanostructures with directional randomness and dimensional order, significantly boosting the efficiency of white OLEDs. Mechanical deformations form on the surface of poly(dimethylsiloxane) in response to compressive stress release, initialized by reactive ions etching with periodicity and depth distribution ranging from dozens of nanometers to micrometers. We demonstrate the possibility of independently tuning the average depth and the dominant periodicity. Integrating these nanostructures into a two-unit tandem white organic light-emitting diode, a maximum external quantum

SUBMITTER: Li Y 

PROVIDER: S-EPMC6611821 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature