Highly Efficient Color‐Stable Deep‐Blue Multilayer PLEDs: Preventing PEDOT:PSS‐Induced Interface Degradation

Abstract

Highly efficient and stable blue light emission is observed in novel copolymers that are produced from specially designed building blocks. A PEDOT:PSS-induced chemical degradation of the polymer light-emitting diodes (PLEDs) is identified at the interface, and it is found to be accompanied by a shift in the emission color. A method to prevent this highly undesirable interaction is presented.

Properties of transparent and conductive Al:ZnO/Au/Al:ZnO multilayers on flexible PET substrates

“…In a next step this deficiency will, however, be addressed by adapting the device stack replacing the PEDOT:PSS by a metal oxide-based injection layer, such as NiO or MoO 3 . These metal oxide layers can be deposited in the fabrication process of the TCO layers, which in turn simplifies the fabrication process of OLEDs and, most importantly, it helps to avoid use of PEDOT:PSS, whose acidic nature is actually known for causing interface defects in OLEDs [33].…”

Synthesis and optoelectronic properties of novel fluorene-bridged dinuclear cyclometalated iridium (III) complex with A–D–A framework in the single-emissive-layer WOLEDs

“…Over the past two decades, considerable progresses have been achieved for red, green and blue OLEDs via utilizing phosphorescent materials of iridium complexes and platinum complexes, which could reach 100% internal quantum efficiency (IQE) in theory [6][7][8][9][10][11]. However, high-efficiency stable white organic light-emitting diodes (WOLEDs) remain a challenge [12,13].…”

Implementing Inkjet‐Printed Transparent Conductive Electrodes in Solution‐Processed Organic Electronics

“…One such example utilizes crosslinking to thermally stabilize a hole‐transporting compound via annealing at 200 °C, after which it is completely insoluble to organic solvents. By spin‐coating a blue emissive compound on top, highly efficient fluorescent blue emitting two‐layer OLEDs were produced . The top electrode consisted of thermally evaporated Cs 2 CO 3 /Al, while the transparent anode was ITO covered with PEDOT:PSS.…”