Enhanced and Balanced Charge Transport Boosting Ternary Solar Cells Over 17% Efficiency

Advanced Materials
Danqin LiQinye Bao

Abstract

Ternary architecture is one of the most effective strategies to boost the power conversion efficiency (PCE) of organic solar cells (OSCs). Here, an OSC with a ternary architecture featuring a highly crystalline molecular donor DRTB-T-C4 as a third component to the host binary system consisting of a polymer donor PM6 and a nonfullerene acceptor Y6 is reported. The third component is used to achieve enhanced and balanced charge transport, contributing to an improved fill factor (FF) of 0.813 and yielding an impressive PCE of 17.13%. The heterojunctions are designed using so-called pinning energies to promote exciton separation and reduce recombination loss. In addition, the preferential location of DRTB-T-C4 at the interface between PM6 and Y6 plays an important role in optimizing the morphology of the active layer.

References

Mar 5, 2016·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Lasse Makkonen
Feb 23, 2018·Nature Communications·Chenkai SunYongfang Li
Dec 28, 2018·ACS Applied Materials & Interfaces·Qicong LiYonghai Chen
Apr 1, 2020·Advanced Materials·Yong CuiJianhui Hou

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Citations

Nov 19, 2020·The Journal of Physical Chemistry Letters·Lingyun ZhuZhixiang Wei

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