Controlled Microwave-assisted Synthesis of Black Phosphorus Quantum Dots Boosts PEDOT:PSS TENG Performance

doi:10.15541/jim20260019

Abstract

Abstract: Black phosphorus quantum dots (BPQDs) have attracted considerable interest in the energy sector owing to their tunable bandgap and high charge carrier mobility. However, the controllable synthesis of high-quality BPQDs remains a significant challenge. This study proposes a facile, low-cost, and efficient microwave-assisted liquid-phase exfoliation strategy for synthesizing BPQDs and explores their application in enhancing triboelectric nanogenerator (TENG) performance. By systematically adjusting microwave temperature, duration, and precursor/solvent ratio, the optimal parameters were identified as 150 ℃, 6 h, and 1:2. Under these conditions, high-quality BPQDs with an average size as small as 1.47 nm and uniform distribution were successfully prepared. Compared with conventional methods, this strategy shows notable advantages in production efficiency and structural integrity. Furthermore, the as-prepared BPQDs were composited with the conductive polymer PEDOT:PSS to form an active friction layer for a field-effect direct-current generator (FENG). Experimental results demonstrate that incorporating BPQDs significantly improves the device's output performance, the average peak current increases by 43.6% compared to the pure PEDOT:PSS-based device. It was also found that reducing BPQD size by raising synthesis temperature linearly enhances output voltage, current, and charge transfer rate, and with the best performance achieved at 150 ℃. The improvement is attributed to the excellent electrical properties of ultrasmall BPQDs and their high specific surface area, which promote interfacial polarization and charge storage. This study not only provides an efficient and green strategy for the controllable preparation of BPQDs but also, through their successful integration into flexible self-powered systems, demonstrates their broad application potential in the field of energy conversion.

Key words: black phosphorus quantum dots, microwave-assisted exfoliation, size-controlled synthesis, triboelectric nanogenerator

CLC Number:

TQ174

YU Junlong, JIANG Yin, GUO Jiangtao, YANG Peizhi, FENG Xiaobo. Controlled Microwave-assisted Synthesis of Black Phosphorus Quantum Dots Boosts PEDOT:PSS TENG Performance[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20260019.

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