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| Left - AFM height image of a F8BT/PFB film. The recessed domains are enriched in PFB. Right - the correspondiong EFM photoinduced charge rate map generated by plotting the inverse exponential time constant for photoinduced charging at each point. The dark rings indicate regions of slower charging. EFM image reveals that the charge generation appears slowest at the interfaces between the polymer domains. (Credit: Nature) |
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