High-performance semitransparent organic solar cells based on sequentially processed heterojunction

doi:10.1039/d2tc04507a

High-performance semitransparent organic solar cells based on sequentially processed heterojunction

2023-01-01

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DOI：10.1039/d2tc04507a

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Average visible transmittance (AVT) and power conversion efficiency (PCE) are the two key parameters to evaluate the performance of semitransparent organic solar cells (ST-OSCs). Reducing the donor content can decrease the light absorption in the visible region and increase the AVT values of ST-OSCs. However, minor donor phase is not sufficient for exciton generation, exciton dissociation and charge transport, and limits the PCEs of OSCs. In this work, ST-OSCs based on a sequentially processed heterojunction (SHJ) structure were fabricated. Through sequentially spin-coating donor PM6 as the bottom layer and acceptor Y6 as the top layer, a better vertical phase distribution is formed in the SHJ structure compared with that in the traditional bulk heterojunction (BHJ) structure. At a PM6: Y6 ratio of 1 : 2, the ST-OSCs based on the SHJ structure show a PCE of 12.6% at an AVT of 25.4%, while the BHJ ST-OSCs show a PCE of 11.8% at an AVT of 22.9%.

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CHARGE-TRANSPORT

POLYMER

LAYER

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High-performance semitransparent organic solar cells based on sequentially processed heterojunction

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