Jump to main content
Jump to site search


Thermal imprinting and vapor annealing of interfacial layers for high-performance organic light-emitting diodes

Author affiliations

Abstract

Control of interfacial layers is highly effective in tuning charge injection and transport processes in various organic optoelectronic architectures for high device performance. Herein, we developed a thermal imprinting and vapor annealing (TIVA) method to regulate the microstructures of the widely used poly(3,4-ethylenedioxythiophene):polystyrenesulfonic acid (PEDOT:PSS) interfacial layer. The introduced ammonia vapor can reduce the acidity of the PSS units and facilitate the formation of continuous hole-transport channels. Meanwhile, the sub-micron patterns can be efficiently transferred from the flexible template to the PEDOT:PSS layer via thermal imprinting (TI) treatment. Interestingly, the synergistic effects on the PEDOT:PSS hole-injection layer (HIL) result in a current efficiency (CE) of 36.62 cd A−1, power efficiency (PE) of 27.60 lm W−1 and external quantum efficiency (EQE) of 18.80% with a more than 35% efficiency enhancement for the blue phosphorescent organic light emitting diodes (PhOLEDs). This novel TIVA method applied to the regulation of a PEDOT:PSS HIL benefits the performance of PhOLEDs in two ways: (1) to regulate the microstructures of PEDOT:PSS and construct continuous hole-transport channels in the intrinsic PEDOT:PSS layer, and (2) to enlarge the interfacial contact and thus create more hole-transport paths from HIL to hole-transporting layer. These findings will provide a new platform for the rational regulation of HILs with efficient and rich charge-transport channels and thus further advance the realization of high-performance OLEDs.

Graphical abstract: Thermal imprinting and vapor annealing of interfacial layers for high-performance organic light-emitting diodes

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 Jun 2019, accepted on 30 Jul 2019 and first published on 31 Jul 2019


Article type: Paper
DOI: 10.1039/C9TC03074C
J. Mater. Chem. C, 2019, Advance Article

  •   Request permissions

    Thermal imprinting and vapor annealing of interfacial layers for high-performance organic light-emitting diodes

    M. Li, J. Wang, Y. Zhang, Y. Dai, L. Chen, C. Zheng, W. Lv, R. Chen and W. Huang, J. Mater. Chem. C, 2019, Advance Article , DOI: 10.1039/C9TC03074C

Search articles by author

Spotlight

Advertisements