Ferromagnetic mechanism in organic photovoltaic cells with closed-shell structures

Abstract We construct a model to reveal the spin polarization or ferromagnetism observed in organic composite nw-P3HT/C60 with closed-shell structures. Different from the organic ferromagnets with open-shell structures, the ferromagnetism of nw-P3HT/C60 comes from the charge transfers from the polym...

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Autores principales:	Liu Yang, Shixuan Han, Xiaolei Ma, Wei Qin, Shijie Xie
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/59e614a279be4fa0a2f3a97078bdb8d4
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spelling	oai:doaj.org-article:59e614a279be4fa0a2f3a97078bdb8d42021-12-02T15:06:27ZFerromagnetic mechanism in organic photovoltaic cells with closed-shell structures10.1038/s41598-017-09004-82045-2322https://doaj.org/article/59e614a279be4fa0a2f3a97078bdb8d42017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09004-8https://doaj.org/toc/2045-2322Abstract We construct a model to reveal the spin polarization or ferromagnetism observed in organic composite nw-P3HT/C60 with closed-shell structures. Different from the organic ferromagnets with open-shell structures, the ferromagnetism of nw-P3HT/C60 comes from the charge transfers from the polymer to the small molecules. The transferred electrons become spin polarized and they are coupled together through the holes in the polymer. Finally, a ferromagnetic order appears in the pure organic composite. The magnetic moment of the system is mainly provided by the spin polarized small molecules. The magnetization is dependent upon the density of the transferred charges, which is consistent to our experimental observations. Our investigation also shows that some new spin phenomena may appear in excited states for organic semiconductors which is absent in the ground states.Liu YangShixuan HanXiaolei MaWei QinShijie XieNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Liu Yang Shixuan Han Xiaolei Ma Wei Qin Shijie Xie Ferromagnetic mechanism in organic photovoltaic cells with closed-shell structures
description	Abstract We construct a model to reveal the spin polarization or ferromagnetism observed in organic composite nw-P3HT/C60 with closed-shell structures. Different from the organic ferromagnets with open-shell structures, the ferromagnetism of nw-P3HT/C60 comes from the charge transfers from the polymer to the small molecules. The transferred electrons become spin polarized and they are coupled together through the holes in the polymer. Finally, a ferromagnetic order appears in the pure organic composite. The magnetic moment of the system is mainly provided by the spin polarized small molecules. The magnetization is dependent upon the density of the transferred charges, which is consistent to our experimental observations. Our investigation also shows that some new spin phenomena may appear in excited states for organic semiconductors which is absent in the ground states.
format	article
author	Liu Yang Shixuan Han Xiaolei Ma Wei Qin Shijie Xie
author_facet	Liu Yang Shixuan Han Xiaolei Ma Wei Qin Shijie Xie
author_sort	Liu Yang
title	Ferromagnetic mechanism in organic photovoltaic cells with closed-shell structures
title_short	Ferromagnetic mechanism in organic photovoltaic cells with closed-shell structures
title_full	Ferromagnetic mechanism in organic photovoltaic cells with closed-shell structures
title_fullStr	Ferromagnetic mechanism in organic photovoltaic cells with closed-shell structures
title_full_unstemmed	Ferromagnetic mechanism in organic photovoltaic cells with closed-shell structures
title_sort	ferromagnetic mechanism in organic photovoltaic cells with closed-shell structures
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/59e614a279be4fa0a2f3a97078bdb8d4
work_keys_str_mv	AT liuyang ferromagneticmechanisminorganicphotovoltaiccellswithclosedshellstructures AT shixuanhan ferromagneticmechanisminorganicphotovoltaiccellswithclosedshellstructures AT xiaoleima ferromagneticmechanisminorganicphotovoltaiccellswithclosedshellstructures AT weiqin ferromagneticmechanisminorganicphotovoltaiccellswithclosedshellstructures AT shijiexie ferromagneticmechanisminorganicphotovoltaiccellswithclosedshellstructures
_version_	1718388449914912768

Ferromagnetic mechanism in organic photovoltaic cells with closed-shell structures

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