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Efficient (4.5% power conversion efficiency) polymer solar cells based on an alternating polyfluorene copolymer are demonstrated. The highest internal quantum efficiency obtained was 87%. The semi-transparent active layer (only 47 nm thick) shows the uniqueness of polymer solar cells and their unconventional applications, such as translucent solar windows for buildings and automobiles.
Chen et al. (2009) studied this question.
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