A Fullerene-Based Organic Exciton Blocking Layer with High Electron Conductivity

We demonstrate the concentration dependence of C60 absorption in solid solutions of C60 and bathocuprione (BCP), revealing a nonlinear decrease of the C60 charge transfer (CT) state absorption. These blends are utilized to study the photocurrent contribution of the CT in bilayer organic photovoltaic...

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Veröffentlicht in:	Nano Lett 2013-07, Vol.13 (7), p.3315-3320
Hauptverfasser:	Bartynski, Andrew N, Trinh, Cong, Panda, Anurag, Bergemann, Kevin, Lassiter, Brian E, Zimmerman, Jeramy D, Forrest, Stephen R, Thompson, Mark E
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Blends Blocking Buckminsterfullerene Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology Electron states Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Electronic transport in multilayers, nanoscale materials and structures Electronics Exact sciences and technology Excitation Excitons and related phenomena Fullerenes Fullerenes and related materials diamonds, graphite Materials science Molecular electronics, nanoelectronics Photocurrent Photoelectric effect Physics Polymer blends Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices solar (photovoltaic), solar (thermal), phonons, thermal conductivity, thermoelectric, electrodes - solar, defects, charge transport, materials and chemistry by design, optics, synthesis (novel materials), synthesis (self-assembly) Specific materials
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Zusammenfassung:	We demonstrate the concentration dependence of C60 absorption in solid solutions of C60 and bathocuprione (BCP), revealing a nonlinear decrease of the C60 charge transfer (CT) state absorption. These blends are utilized to study the photocurrent contribution of the CT in bilayer organic photovoltaics (OPVs); 1:1 blends produce 40% less photocurrent. As exciton blocking electron transporting layers, the blends achieve power conversion efficiencies of 5.3%, an increase of 10% compared to conventional buffers.
ISSN:	1530-6984 1530-6992
DOI:	10.1021/nl401531t