Improvement in the Power Conversion Efficiency of Bulk Heterojunction Photovoltaic Device via Thermal Postannealing of Subphthalocyanine:C<sub>70</sub> Active Layer

<table>The AFM images for the active layer of SubPc:C<sub>70</sub> with various postannealing temperatures.</table>

International Journal of Photoenergy

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Figure 5

Figure 5: Improvement in the Power Conversion Efficiency of Bulk Heterojunction Photovoltaic Device via Thermal Postannealing of Subphthalocyanine:C<sub>70</sub> Active Layer 

Figure 5 | Improvement in the Power Conversion Efficiency of Bulk Heterojunction Photovoltaic Device via Thermal Postannealing of Subphthalocyanine:C70 Active Layer 