Asymmetric AZA-BODIPY with Optical Gain in the Near-Infrared Region

Abstract

In recent years, there has been a lot of interest in the development of organic compounds emitting in the near-infrared (NIR) region due to their stimulating applications, such as biosensing and light detection and ranging (LiDAR). Moreover, a lot of effort has been devoted to finding organic emitters with optical gain in the NIR region for lasing applications. In this paper, we present the ultrafast spectroscopy of an asymmetric AZA-BODIPY molecule that shows relevant photophysical changes moving from a diluted solution to a concentrated solution and to a spin-coated film. The diluted solution and the spin-coated film show a bleaching band and a stimulated emission band in the visible region, while the very concentrated solution displays a broad (150 nm) and long-living (more than 400 ps) optical gain band in the NIR region, centered at 900 nm. Our results pave the way for a new organic laser system in a near-infrared spectral region.

AZABODIPY aggregates as a promising electroluminescent material for sustainable NIR OLED applications

“…However, the main factors are concentration quenching which decreases PLQY in the solid state and the energy gap law. Additionally, as reported in ref 40,. the DTDPAB molecule suffers from the photoinduced absorption in the spectral range of the aggregates emission which is another efficiency loss mechanism.…”

“…Additionally, as reported in ref. 40, the DTDPAB molecule suffers from the photoinduced absorption in the spectral range of the aggregates emission which is another efficiency loss mechanism.…”

“…We use the standard approach of dispersing the dye in a host based on the commercial conjugated polymer F8BT and its derivative random copolymer synthesized in our laboratory F8BT-TTBT (see Scheme 1). 40 We were able to obtain a delicate balance between the quenching effect of the emission caused by the aggregation and the blue shift of the emission due to the dispersion of the organic molecule. In order to improve the effectiveness of our approach we modified the architecture of the devices, direct and inverted, the charge regulating layers, and the polymeric host.…”

Interplay between Theory and Photophysical Characterization in Symmetric α-Substituted Thienyl BODIPY Molecule

“…These materials exhibit promising characteristics, such as a high photoluminescence quantum yield and ease of functionalization, making them ideal candidates for active materials in photonics applications. While BODIPY derivatives have shown exceptional performance in diluted solutions as lasing media, their application in the solid state has been less explored due to challenges such as a lower quantum yield and susceptibility to the composition and structure of polymer matrices [ 24 , 25 ].…”

Improvement of Dynamic Performance and Detectivity in Near-Infrared Colloidal Quantum Dot Photodetectors by Incorporating Conjugated Polymers

“…The detection of near-infrared (NIR) light is currently evaluated as an important technology in a wide range of fields, such as bioimaging, optical communications, and autonomous driving sensors [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. Therefore, NIR photodetectors (PDs) that convert NIR light into electrical signals have been actively studied, resulting in the development of various types of active materials based on silicon, InGaAs (III–V compounds), organic dyes, and colloidal quantum dots (CQDs) [ 10 , 11 , 12 , 13 , 14 , 15 ].…”