气候变化领域集成服务门户(CCPortal): Energy harvesting from shadow-effect

CCPortal

DOI	10.1039/d0ee00825g
	Energy harvesting from shadow-effect
	Zhang Q.; Liang Q.; Nandakumar D.K.; Ravi S.K.; Qu H.; Suresh L.; Zhang X.; Zhang Y.; Yang L.; Wee A.T.S.; Tan S.C.
发表日期	2020
ISSN	17545692
起始页码	2404
结束页码	2413
卷号	13 期号:8
英文摘要	Shadows are everywhere. Not much engineering use has been found for shadows, and this ubiquitous effect is strenuously avoided in optoelectronic applications. In this work, we present a shadow-effect energy generator (SEG) that scavenges the illumination contrast that arises on the device from shadow castings, and generates a direct current, simply by placing a part of the generator in shadow. The shadow-effect mechanism is experimentally validated by Kelvin Probe Force Microscopy (KPFM). The SEG is capable of harvesting energy from illumination contrasts arising under weak ambient light. Without any optimization, our generator has a power density of 0.14 µW cm-2 under indoor conditions 0.001 sun, where shadows are persistent. Our SEG performs 200% better than that of commercial silicon solar cells under the effects of shadows. The harvested energy from our generator in the presence of shadows arising at a very low intensity (0.0025 sun) can drive an electronic watch (1.2 V). In addition, the SEG can serve as a self-powered sensor for monitoring moving objects by tracking the movement of shadows. With its cost-efficiency, simplicity and stability, our SEG offers a promising architecture to generate green energy from ambient conditions to power electronics, and as a part of a smart sensor systems, especially in buildings. © 2020 The Royal Society of Chemistry.
英文关键词	Electric generators; Energy efficiency; Energy harvesting; Object tracking; Ambient conditions; Cost efficiency; Harvesting energies; Indoor conditions; Kelvin probe force microscopy; Optoelectronic applications; Power densities; Sensor systems; Solar power generation; equipment component; experimental study; fuel cell; model validation; movement; optimization; power generation; sensor
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189588
作者单位	Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117574, Singapore; Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore
推荐引用方式 GB/T 7714	Zhang Q.,Liang Q.,Nandakumar D.K.,et al. Energy harvesting from shadow-effect[J],2020,13(8).
APA	Zhang Q..,Liang Q..,Nandakumar D.K..,Ravi S.K..,Qu H..,...&Tan S.C..(2020).Energy harvesting from shadow-effect.Energy & Environmental Science,13(8).
MLA	Zhang Q.,et al."Energy harvesting from shadow-effect".Energy & Environmental Science 13.8(2020).