Wide-gamut lasing from a single organic chromophore

Abstract

The development of wideband lasing media has deep implications for imaging, sensing, and display technologies. We show that a single chromophore can be engineered to feature wide-gamut fluorescence and lasing throughout the entire visible spectrum and beyond. This exceptional color tuning demonstrates a chemically controlled paradigm for light emission applications with precise color management. Achieving such extensive color control requires a molecular blueprint that yields a high quantum efficiency and a high solubility in a wide variety of liquids and solids while featuring a heterocyclic structure with good steric access to the lone pair electrons. With these requirements in mind, we designed a lasing chromophore that encloses a lasing color space twice as large as the sRGB benchmark. This record degree of color tuning can in principle be adapted to the solid state by incorporating the chromophore into polymer films. By appropriately engineering the base molecular structure, the widest range of lasing wavelengths observed for a conventional gain medium can be achieved, in turn establishing a possible route toward high-efficiency light emitters and lasers with near-perfect chromaticity.

2,6‐Dicarbonitrile Diphenyl‐1λ5‐Phosphinine (DCNP)—A Robust Conjugated Building Block for Multi‐Functional Dyes Exhibiting Tunable Amplified Spontaneous Emission

“…[26] Nevertheless, the limited color-tuning range is confined mainly to a few tens of nanometers (nm), which implies that alternative design strategies ought to be proposed to construct novel functional materials with wider color-tuning capabilities. [27][28][29] Recently, intra-or intermolecular donor-acceptor (D-A) interplay has significantly accelerated the progress of organic optoelectronics by utilizing the spin-forbidden non-emissive triplets as thermally-activated delayed fluorescence (TADF), including organic light-emitting diodes (OLEDs) and organic long-persistent luminescence. [30][31][32] However, the induced charge-transfer (CT) state is commonly not appreciated in organic lasing dyes due to the well-separated highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) distribution, which will decrease the oscillator strength and photoluminescence quantum yields (Φ F ), retard the radiative rate (k r ) and suppress the lasing performance.…”

Effects of Chemical and Geometric Microstructures on the Crystallization of Surface Droplets during Solvent Exchange

“…2,5-Bis­(2-(4-pyridyl)-vinylene) hydroquinone dineopentyl ether (Np-P4VB) was prepared by following the protocol reported in the literature . The solution of Np-P4VB was prepared similar to the preparation of the β-alanine solution.…”

“…2,5-Bis(2-(4-pyridyl)-vinylene) hydroquinone dineopentyl ether (Np-P4VB) was prepared by following the protocol reported in the literature. 36 The solution of Np-P4VB was prepared similar to the preparation of the β-alanine solution. The solvent ratio for solution A consisted of 15:4:0.35 (ethanol/water/mesitylene) with approximately 0.01 g of Np-P4VB per 50 mL of the solvents.…”

Effects of chemical and geometric micro-structures on crystallization of surface droplets during solvent exchange

“…2,5-Bis(2-(4-pyridyl)-vinylene) hydroquinone dineopentyl ether (Np-P4VB) was prepared by following the protocol reported in literature 36 . The solution of Np-P4VB was prepared similarly to the preparation of the alanine solution.…”