English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

High efficiency perovskite light-emitting diodes (PeLEDs) using PEDOT:PSS/MoO 3 -ammonia composite hole transport layers (HTLs) with different MoO 3 -ammonia ratios were prepared and characterized. For PeLEDs with one-step spin-coated CH 3 NH 3 PbBr 3 emitter, an optimal MoO 3 -ammonia volume ratio (0.02) in PEDOT:PSS/MoO 3 -ammonia composite HTL presented a maximum luminance of 1082 cd/m 2 and maximum current efficiency of 0.7 cd/A, which are 82% and 94% higher than those of the control device using pure PEDOT:PSS HTL respectively. It can be explained by that the optimized amount of MoO 3 -ammonia in the composite HTLs cannot only facilitate hole injection into CH 3 NH 3 PbBr 3 through reducing the contact barrier, but also suppress the exciton quenching at the HTL/CH 3 NH 3 PbBr 3 interface. Three-step spin coating method was further used to obtain uniform and dense CH 3 NH 3 PbBr 3 films, which lead to a maximum luminance of 5044 cd/m 2 and maximum current efficiency of 3.12 cd/A, showing enhancement of 750% and 767% compared with the control device respectively. The significantly improved efficiency of PeLEDs using three-step spin-coated CH 3 NH 3 PbBr 3 film and an optimum PEDOT:PSS/MoO 3 -ammonia composite HTL can be explained by the enhanced carrier recombination through better hole injection and film morphology optimization, as well as the reduced exciton quenching at HTL/CH 3 NH 3 PbBr 3 interface. These results present a promising strategy for the device engineering of high efficiency PeLEDs.

micromachines

Improved Efficiency of Perovskite Light-Emitting Diodes Using a Three-Step Spin-Coated CH3NH3PbBr3 Emitter and a PEDOT:PSS/MoO3-Ammonia Composite Hole Transport Layer