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

作者：Bartynski Andrew N; Trinh Cong; Panda Anurag; Bergemann Kevin; Lassiter Brian E; Zimmerman Jeramy D; Forrest Stephen R; Thompson Mark E^*

来源：Nano Letters, 2013, 13(7): 3315-3320.

DOI：10.1021/nl401531t

• Organic photovoltaics
• fullerenes
• small-molecule
• organic semiconductors
• buffer layers
• exciton blocking layers

We demonstrate the concentration dependence of C-60 absorption in solid solutions of C-60 and bathocuprione (BCP), revealing a nonlinear decrease of the C-60 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.

• 出版日期2013-7