Flexible and Highly Sensitive Strain Sensors Fabricated by Pencil Drawn for Wearable Monitor
Xinqin Liao, Qingliang Liao, Xiaoqin Yan, Qijie Liang, Haonan Si, Minghua Li, Hualin Wu, Shiyao Cao and Yue Zhang
Easy-to-fabricate, cost-effective, soft, lightweight, versatile sensors revolutionize the sensing technology and can be applied in personal electronic devices, artificial intelligence systems, and structural health monitoring. The pen-on-paper approach endows the pencil trace based on a printing paper with strain-sensing capability for monitoring the rapid microstrain structural variation, book folding, and human motion. The sensors are low carbon footprint, disposable, and green products.
Morphological Control for High Performance, Solution-Processed Planar Heterojunction Perovskite Solar Cells
Deepu J. Giles E. Eperon, Victor M. Burlakov, Pablo Docampo, Alain Goriely and Henry J. Snaith
The critical role of perovskite morphology in planar heterojunction perovskite solar cells is probed and understood. Dewetting of perovskite films is minimized, to achieve uniform 100% coverage perovskite layers. Solution cast planar heterojunction solar cells with efficiencies of up to 11.4% are fabricated, a new record for such cells with no mesoporous layer.
Fast and Large Lithium Storage in 3D Porous VN Nanowires–Graphene Composite as a Superior Anode Toward High-Performance Hybrid Supercapacitors
Rutao Wang, Junwei Lang, Peng Zhang, Zongyuan Lin and Xingbin Yan
A 3D porous VN nanowires–graphene composite is proved to be a pseudocapacitive material with the fast and large Li-ion storage characteristics. Such superior composite anode coupling with a capacitance-type porous carbon cathode is able to assemble a novel hybrid Li-ion capacitor with an ultrahigh energy density of 162 Wh kg−1 and good rate performance.
