Organic Laser Molecule with High Mobility, High Photoluminescence Quantum Yield, and Deep-Blue Lasing Characteristics

Abstract

Here, we design and synthesize an organic laser molecule, 2,7-diphenyl-9H-fluorene (LD-1), which has state-of-the-art integrated optoelectronic properties with a high mobility of 0.25 cm2 V–1 s–1, a high photoluminescence quantum yield of 60.3%, and superior deep-blue laser characteristics (low threshold of P th = 71 μJ cm–2 and P th = 53 μJ cm–2 and high quality factor (Q) of ∼3100 and ∼2700 at emission peaks of 390 and 410 nm, respectively). Organic light-emitting transistors based on LD-1 are for the first time demonstrated with obvious electroluminescent emission and gate tunable features. This work opens the door for a new class of organic semiconductor laser molecules and is critical for deep-blue optical and laser applications.

High‐Mobility Organic Light‐Emitting Semiconductors and Its Optoelectronic Devices

“…Recently, Liu et al developed a new organic laser molecule, 2,7‐diphenyl‐9H‐fluorene (LD‐1), based on the fluorene motif. [ 53 ] The introduction of a rotational carbon−carbon bond for extending π ‐conjugation was used to modulate both optical and electrical properties. More specifically, the LD‐1 compound has well‐integrated high‐mobility charge transport and strong light emission characteristics.…”

Foldable semi-ladder polymers: novel aggregation behavior and high-performance solution-processed organic light-emitting transistors

“…[5][6][7][8] The OLETs, therefore, offer the potential for simplifying circuit design in the electroluminescent displays, electrically pumped organic lasers, and digital displays. [9][10][11][12] However, the requirements of organic semiconductors for OLET based applications are more stringent than those of OLED active materials. They include balanced high ambipolar mobility and high photoluminescent quantum yield (PLQY) simultaneously in the same material, which are usually not compatible and difficult to realize.…”

Aggregation‐induced emission properties of pyridyl‐containing tetra‐arylethenes

“…Organic fluorescent molecules whose optical properties can be conveniently tuned by adjusting molecular structures or physical states have been attracting great attention in fields of biological imaging, chemical sensing and optoelectronic systems etc. [1][2][3][4][5][6] Among these molecules, aggregation-induced emission (AIE) fluorophores exhibited strong emission in aggregation and solid state, which well overcame the deficiency in aggregation-induced quenching (ACQ) that often happens in traditional luminescent materials. [7,8] Over the past two decades, many AIE-active fluorophores have been prepared and applied in various fields due to their excellent optical properties in aggregation.…”