Unraveling the Characteristic Shape for Magnetic Field Effects in Polymer–Fullerene Solar Cells | Zendy

Marco Antonio Cabero Zabalaga | Zendy; Jiaqi Wei | Zendy; Huaiwen Yang | Zendy; Bing Bing Fan | Zendy; Yanming Sun | Zendy; Weisheng Zhao | Zendy

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Unraveling the Characteristic Shape for Magnetic Field Effects in Polymer–Fullerene Solar Cells

Author(s) -

Marco Antonio Cabero Zabalaga,

Jiaqi Wei,

Huaiwen Yang,

Bing Bing Fan,

Yanming Sun,

Weisheng Zhao

Publication year - 2017

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.7b01470

Subject(s) - fullerene , materials science , organic solar cell , energy conversion efficiency , magnetic field , conductance , polymer solar cell , optoelectronics , polymer , condensed matter physics , nanotechnology , physics , composite material , quantum mechanics

Spin-dependent effects in organic solar cells (OSCs) are responsible for tuning the electric current when an external magnetic field is applied. Here, we report the magnetic field effect (MFE) on wide-bandgap (WBG) solar cells based on the polymers PBDT(O)-T1 and PBDT(Se)-T1 blended with PC 70 BM. Furthermore, we propose an experimental method based on the electrical transport ( i - V ) measurements to unveil the negative magneto conductance (MC) at small bias. The observed curves in a double-logarithmic scale display a particular S-like shape, independent of the OSC power conversion efficiency (PCE) or MC amplitudes. Additionally, from the slope of the S-like shape curve, it is possible to identify the fullerene concentrations that would result in the minimum MC and the maximum PCE. Our work opens up a door to find more patterns to describe MFE and PCE in polymer-fullerene solar cells, without the application of external magnetic or luminous sources.

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