气候变化领域集成服务门户(CCPortal): A new ultrafast energy funneling material harvests three times more diffusive solar energy for GaInP photovoltaics

CCPortal

DOI	10.1073/PNAS.2019198117
	A new ultrafast energy funneling material harvests three times more diffusive solar energy for GaInP photovoltaics
	Willich M.M.; Wegener L.; Vornweg J.; Hohgardt M.; Nowak J.; Wolter M.; Jacob C.R.; Walla P.J.
发表日期	2021
ISSN	00278424
起始页码	32929
结束页码	32938
卷号	117 期号:52
英文摘要	There is no theoretical limit in using molecular networks to harvest diffusive sun photons on large areas and funnel them onto much smaller areas of highly efficient but also precious energy-converting materials. The most effective concept reported so far is based on a pool of randomly oriented, light-harvesting donor molecules that funnel all excitation quanta by ultrafast energy transfer to individual light-redirecting acceptor molecules oriented parallel to the energy converters. However, the best practical light-harvesting system could only be discovered by empirical screening of molecules that either align or not within stretched polymers and the maximum absorption wavelength of the empirical system was far away from the solar maximum. No molecular property was known explaining why certain molecules would align very effectively whereas similar molecules did not. Here, we first explore what molecular properties are responsible for a molecule to be aligned. We found a parameter derived directly from the molecular structure with a high predictive power for the alignability. In addition, we found a set of ultrafast funneling molecules that harvest three times more energy in the solar’s spectrum peak for GaInP photovoltaics. A detailed study on the ultrafast dipole moment reorientation dynamics demonstrates that refocusing of the diffusive light is based on ∼15-ps initial dipole moment depolarization followed by ∼50-ps repolarization into desired directions. This provides a detailed understanding of the molecular depolarization/repolarization processes responsible for refocusing diffusively scattered photons without violating the second law of thermodynamics. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Light-harvesting concentrators; Polarization experiments; Pump–probe experiments; Ultrafast spectroscopy
语种	英语
scopus关键词	article; conformation; depolarization; dipole; light harvesting system; photon; polarization; repolarization; solar energy; spectroscopy; thermodynamics
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179674
作者单位	Department for Biophysical Chemistry, Institute for Physical and Theoretical Chemistry, Technische Universität Braunschweig, Braunschweig, 38106, Germany; Department for Theoretical Chemistry, Institute for Physical and Theoretical Chemistry, Technische Universität Braunschweig, Braunschweig, 38106, Germany
推荐引用方式 GB/T 7714	Willich M.M.,Wegener L.,Vornweg J.,et al. A new ultrafast energy funneling material harvests three times more diffusive solar energy for GaInP photovoltaics[J],2021,117(52).
APA	Willich M.M..,Wegener L..,Vornweg J..,Hohgardt M..,Nowak J..,...&Walla P.J..(2021).A new ultrafast energy funneling material harvests three times more diffusive solar energy for GaInP photovoltaics.Proceedings of the National Academy of Sciences of the United States of America,117(52).
MLA	Willich M.M.,et al."A new ultrafast energy funneling material harvests three times more diffusive solar energy for GaInP photovoltaics".Proceedings of the National Academy of Sciences of the United States of America 117.52(2021).