Favorable electronic structure for organic solar cells induced by strong interaction at interface | Zendy

Shenghao Wang | Zendy; T. Sakurai | Zendy; Xia Hao | Zendy; Wei Fu | Zendy; Shigeru Masuda | Zendy; Katsuhiro Akimoto | Zendy

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Favorable electronic structure for organic solar cells induced by strong interaction at interface

Author(s) -

Shenghao Wang,

T. Sakurai,

Xia Hao,

Wei Fu,

Shigeru Masuda,

Katsuhiro Akimoto

Publication year - 2013

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.4829905

Subject(s) - xanes , work function , photoemission spectroscopy , substrate (aquarium) , spectroscopy , layer (electronics) , materials science , electronic structure , organic solar cell , x ray photoelectron spectroscopy , monolayer , absorption (acoustics) , ultraviolet photoelectron spectroscopy , absorption spectroscopy , analytical chemistry (journal) , angle resolved photoemission spectroscopy , chemistry , nanotechnology , optics , computational chemistry , polymer , chemical engineering , oceanography , physics , quantum mechanics , chromatography , geology , engineering , composite material

To clarify the role of buffer layer in organic solar cells (OSCs), the electronic properties of bathocuproine (BCP)/Mg interface were systematically investigated by using ultraviolet photoemissions spectroscopy, high-resolution X-ray photoemission spectroscopy, angle-resolved X-ray photoemission spectroscopy and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy. The results show there are gap states at the interface, which are caused by the interaction between BCP and Mg. The formation of Mg-N bond was found at the interface. The NEXAFS measurements show that BCP molecules for 1-2 monolayers are lying-down on the substrate, whereas orient randomly for thick BCP layer. It was supposed that the gap states and the highly-ordered orientation of thin BCP layer are the reasons for improving the performance of OSC with BCP buffer layer and low work function metal cathode

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