부산대학교 도서관

Transparent triboelectric nanogenerators (TENGs) are promising sustainable energy sources utilizable in optoelectronic devices. Here, we report a highly transparent TENG realized using AgNW-spray-deposition with a surfactant (ASDS). The ASDS process achieved coffee-ring-free AgNW with superior light transmittance of 87.6% and sheet resistance of 12.4 Ω/sq (ΦFOM = 21.5 × 10−3Ω−1), and possessed a high degree of design flexibility on 2D, 3D-curved substrates. The AgNW-spray-deposition with surfactant based transparent TENG (AT-TENG) with hydrophobic characteristics enables to generate electrical signals through solid–solid and solid–liquid contact electrification. As proof-of-concept applications, a self-powered bendable tactile sensor, which exploited biomechanical energy from finger-touch motion, and hybrid energy harvester to concurrently harvest solar and raindrop energy, are demonstrated. The self-powered bendable tactile sensor transformed the finger-touch into electrical energy recognized by the computer, and was utilized as a transparent keypad. The hybrid energy harvester, which is AT-TENG unified with a photovoltaic system, generates electricity from light and falling-droplets. The AT-TENG does not significantly degrade the output performance of photovoltaic system, and their parallel connection enables to achieve the maximum output voltage of 7.0 V. AT-TENGs have advantages such as simplicity of fabrication, outstanding transparency, and superior electrical performance, and have potential for future applications in wearable electronics and smart-home systems.