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PCEs of 15.81% and 15.29% are achieved in LbL and BHJ all-PSCs with polymer donor PM6, polymer acceptor PY-IT and CN as an additive. Over 15% PCE improvement can be obtained in LbL and BHJ all-PSCs with CN in LbL and BHJ active layers.
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Xu et al. (2022) studied this question.
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