Extremely Foldable and Highly Porous Reduced Graphene Oxide Films for Shape‐Adaptive Triboelectric Nanogenerators

作者: Hee Jae Hwang , Jeong Seok Yeon , Yeonseok Jung , Ho Seok Park , Dukhyun Choi

DOI: 10.1002/SMLL.201903089

关键词: GrapheneMaterials scienceTriboelectric effectDiodeLight-emitting diodeOptoelectronicsOxideGreen-lightConductivityAnnealing (metallurgy)

摘要: Here, a thin and foldable porous reduced graphene oxide (rGO) fabricated by solvent casting method (SC-rGO) is introduced. The SC-rGO superior to aluminum as positive triboelectric material in nanogenerators (TENGs), significantly enhancing TENG output performance. film shows extremely features, where it could be folded 1/16 size. electrical properties device performance of are optimized varying thicknesses from 5 30 µm. A µm thick with non-annealed (STENG) the highest about 255 µW cm-2 due its high carrier concentration, low work function, surface area. After annealing, STENG 10 because their functions decreases, while corresponding concentrations decrease according thickness films. films highly durable stable, conductivity show negligible changes after 100 000 cycles mechanical deformation. large size 13 × 3 cm2 attached inside person's arm demonstrate shape-adaptive characteristics. Consequently, 170 V obtained turns on 19 green light emitting diodes simply touching STENG.

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