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Organic solar cells (OSCs) represent a burgeoning photovoltaic technology with vast potential in multi-purpose applications, including power generators and flexible electronics. Recently, to achieve high-performance OSCs, an emerging molecular design strategy of applying flexible alkyl units as linkers to construct non-fully conjugated photovoltaic materials has been developed and addressed great attention. More details are discussed in the article by Zhang et al. on page 1307—1318.