Excitonic channels from bio-inspired templated supramolecular assembly of J-aggregate nanowires

Abstract

High quality J-aggregate nanowires obtained from complexation of dendronized polymers with J-aggregates.

Enhanced Room‐Temperature Photoluminescence Quantum Yield in Morphology Controlled J‐Aggregates

“…[ 21 ] Therefore, improving the PLQY by reducing the non‐radiative decay channels of J‐aggregates is necessary to enhance the performance of the hybrid systems discussed above. [ 19,20,22–25 ] Furthermore, emitters with ultra‐narrow PL spectra are of great importance in active pixel display technologies, where the narrow‐emission band could result in emitting devices with more brilliant colors. However, the low PLQY typical for regular J‐aggregates hampered their wide‐spread use in such devices, an opportunity that could come within reach once the PLQY is boosted to the level of common‐used organic emitting compounds, with PLQY above 50%.…”

Exploiting supramolecular assemblies for filterless ultra-narrowband organic photodetectors with inkjet fabrication capability

“…In previous work, we have observed such changes when depositing J-aggregates on functionalized surfaces. 38 Here we found, however, that J-aggregate films retained the desired optical properties such as high oscillator strength and narrow absorption width (Fig. 1d).…”

“…49 In previous work, we showed that Jaggregate formation can also be induced in acetate buffer even at low dye 10 concentration. 38,50 We applied the same strategy successfully to the J780 and J980 dyes and obtained narrow-banded aggregates in solution. Compared to the monomer absorption obtained from methanol solution, the absorption peaks are redshifted by 100-200 nm and present significantly narrowed widths ( Fig.…”

“…34 Utilizing particular self-assembly techniques, pure J-aggregates can be obtained showing extremely narrow absorption bands (FWHM < 20 nm) along with coherent exciton diffusion in tightly packed molecular assemblies. [35][36][37][38] Such intrinsic material features are unique and highly desirable for narrowband photodetectors relying neither on filtering approaches nor on CCN. Osedach et al 39 have shown that J-aggregates of cyanine dyes can be used in a NIR photodetector with peak sensitivity at 756 nm.…”

Fabrication of Dipole-Aligned Thin Films of Porphyrin J-Aggregates over Large Surfaces

“…Photoactive molecules, including J-aggregates, have undergone a renaissance due to their important roles in light-harvesting materials such as the ones found in photovoltaic cells and nonlinear optical devices. They are also used in numerous areas of applied research such as molecular electronics, − nonlinear optics, waveguides, photodetection, , molecular plasmonics, − and artificial photosynthesis. − …”