journal article·2025-08Open access

Ternary Blend Organic Photovoltaics with High Efficiency and Stability Through Energy Transfer and Molecular Packing Induced by an A‐D‐A Small Molecule (Small 34/2025)

Bin Chang, Chung‐Hao Chen, Atsushi Yabushita, Tzu‐Ching Lu, Ching‐En Tsai, Ting‐Yi Chu, Shaun Tan, Cheng‐Si Tsao, Yu‐Sheng Chu, Fang‐Cheng Ou, Kung‐Hwa Wei

Small· Volume 21· Issue 34

Abstract

Organic Photovoltaics In article number 2500692, Kung-Hwa Wei and co-workers present a rigid A-D-A small molecule with dithiophenepyrrole core and indene-dione (IO2Cl) side chain for forming ternary blends with polymer PM6 and three A–DA'D–A acceptor (L8-BO, BTP-eC9 or Y6) for organic photovoltaics (OPVs). The champion PM6:L8-BO:DTP-2EH-IO2Cl device displays strong molecular packing, high power conversion efficiency (PCE) of 19.2% and enhanced thermal stability of 568 h. The introduction of DTP-2EH-IO2Cl as the third component enhances packing of A–DA'D–A acceptors, providing an effective way to tune the morphology for boosting the PCE and thermal stability of OPVs.
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Research context

OpenAlex topics: solar cell performance optimization · Organic Electronics and Photovoltaics · CO2 Reduction Techniques and Catalysts

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Affiliations

Department of Materials Science and Engineering National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan

Department of Electrophysics National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan

Department of Chemistry Massachusetts Institute of Technology 77 Massachusetts Avenue Cambridge MA 02139 USA

Department of Materials Science and Engineering National Taiwan University Taipei 106319 Taiwan

National Synchrotron Radiation Research Center Hsinchu 30010 Taiwan

References

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