Solution processed red organic light-emitting-diodes using an N-annulated perylene diimide fluorophore

Abstract

In this contribution we report on solution processed red OLEDs based upon an N-annulated perylene diimide dimer, namely tPDI2N-EH, a red-light emitting molecule.

Synthesis, characterization and use of benzothioxanthene imide based dimers

“…Hence, and as a further step into the characterization of these dimers and for a deeper structure-property relationship investigation, solution-processed OLED devices, of architecture: glass/ITO/PEDOT:PSS/Emitting layer (EML)/ZnO/Ag, were then fabricated. 10 The luminescent and commercially available conjugated polymer PFO, also known as F8, was used into the EMLs as a host material to improve the performances of small molecules-based OLEDs. 10,11 Tested under ambient conditions, it is noteworthy that all devices emitted light when connected to an external voltage, thus demonstrating, for the first time, up and running BTXIbased OLEDs.…”

“…10 The luminescent and commercially available conjugated polymer PFO, also known as F8, was used into the EMLs as a host material to improve the performances of small molecules-based OLEDs. 10,11 Tested under ambient conditions, it is noteworthy that all devices emitted light when connected to an external voltage, thus demonstrating, for the first time, up and running BTXIbased OLEDs. An overview of the main characteristics of the three BTXI-based OLEDs is summarized in Table 2 and their electroluminescence spectra (EL) and the Commission Internationale de l'Eclairage (CIE) color coordinates are shown in Figure 5.…”

Organic light emitting diodes (OLEDs) with slot-die coated functional layers

“…(a-d) Images showing the process for OLED fabrication. Light emission from OLEDs with (e) slot-die and (f) spin coated ETLs and EMLs (taken from the reference90 ).Dayneko et al91 investigated the utility of the N-annulated perylene diimide fluorophore (tPDI 2 N-EH) as a red emitting material for OLED applications and demonstrated the slot-die coating (via a roll process) of bilayer OLEDs on a flexible plastic substrate. The OLED configuration was: PET(Polyethylene terephthalate)/ITO/PEDOT:PSS/ F8:tPDI2N-EH/LiF/Ag.…”

An Efficient Imine Photocyclization as an Alternative to the Pictet-Spengler Reaction for the Synthesis of AzaBenzannulated Perylenediimide Dyes

“…Thus, they establish a scaffold of choice for the elaboration of organic electronic devices such as Organic Field Effect Transistors (OFETs) 4 and Organic Light Emitting Devices (OLEDs). 5,6 Tridimensional multimeric PDIs architectures are also known as non-fullerene acceptors (NFAs) 7 in Organic Solar Cells (OSCs). 8 Hence, the potential of PDIs for various applications pushed the community to develop an extensive set of synthetic strategies to tune their self-assembling and optical/electronical properties.…”

“…12 Alternatively, 1-nitroPDI can be quantitatively reduced into 1-NH2PDI by catalytic hydrogenation. 5 From there, a Pictet-Spengler reactions using various aldehydes has been initially reported by Wang, 13 and was then expanded by Würthner 14 to synthesize a library of mono and bis AzaBenzannulated PDIs (AzaBPDIs) (Figure 1a) derivatives, used as ligands for transition metals. 15 However this strategy afforded AzaBPDIs only in moderate yields.…”