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A quasi-ordered bulk heterojunction of P3HT/PCBM solar cells fabricated by zone-casting

Liu, Jiangang ; Gao, Xiang ; Sun, Yue ; Han, Yanchun

Solar energy materials and solar cells, 2013-10, Vol.117, p.421-428 [Periódico revisado por pares]

Amsterdam: Elsevier B.V

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Título:
A quasi-ordered bulk heterojunction of P3HT/PCBM solar cells fabricated by zone-casting
Autor: Liu, Jiangang ; Gao, Xiang ; Sun, Yue ; Han, Yanchun
Assuntos: Alignment ; Applied sciences ; Bridging ; Current density ; Devices ; Direct energy conversion and energy accumulation ; Electrical engineering. Electrical power engineering ; Electrical power engineering ; Energy ; Exact sciences and technology ; Grain boundary ; Nanofibers ; Natural energy ; Photoelectric conversion ; Photovoltaic cells ; Photovoltaic conversion ; Polythiophene ; Power networks and lines ; Solar cells ; Solar cells. Photoelectrochemical cells ; Solar energy ; Spin coating ; Users connections and in door installation ; Zone-casting
É parte de: Solar energy materials and solar cells, 2013-10, Vol.117, p.421-428
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: In this paper, a quasi-ordered bulk hetertojunction of P3HT/PCBM solar cells (Q-O BHJ device) was fabricated by zone-casting from the solutions with different aging times. P3HT nanofibers aligned in an oriented manner due to the shear stress and solute concentration gradient during zone-casting process. The orientation degree of P3HT nanofibers increased when the aging time of solution was prolonged. Meanwhile, P3HT had a high crystallinity due to the slow evaporation rate of solvent during the film-forming process. The oriented alignment of nanofibers could facilitate the connection between nanofibers by increasing the bridging chains. Furthermore, the bridging chains tended to adopt an untwisted conformation, which results in a reduced energy barrier of hole transfer. As a consequence, the Q-O BHJ device had a higher fill factor (FF) and short-circuit current density (Jsc) compared with the device fabricated by spin coating (BHJ device), leading to an increase by almost more than 50% in device efficiency and a PCE of 3.26% without any annealing treatment. •A quasi-ordered bulk hetertojunction of P3HT/PCBM solar cells was fabricated by zone-casting technique.•P3HT nanofibers aligned in an oriented manner due to the shear stress and solute concentration gradient during zone-casting process.•The oriented alignment of nanofibers could facilitate P3HT chains to bridge nanofibers and improve the ability of hole transfer.•The device efficiency increased to 3.26% without any annealing treatment.
Editor: Amsterdam: Elsevier B.V
Idioma: Inglês

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A quasi-ordered bulk heterojunction of P3HT/PCBM solar cells fabricated by zone-casting

Liu, Jiangang ; Gao, Xiang ; Sun, Yue ; Han, Yanchun

Amsterdam: Elsevier B.V

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