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. 2012 Feb 20;7(1):142. doi: 10.1186/1556-276X-7-142

Figure 4.

Figure 4

Band structure of PCBM after electron beam irradiation of different fluences. (a) Non-irradiated PCBM. (b) Irradiated PCBM at 3.6 × 1016, (c) 7.2 × 1016, and (d) 1.44 × 1017 cm-2.