Dual‑Donor‑Induced Crystallinity Modulation Enables 19.23% Efficiency Organic Solar CellsOA
Trap-assisted charge recombination is one of the primary limitationsof restricting the performance of organic solar cells. However, effectivelyreducing the presence of traps in the photoactive layer remains challenging.Herein, wide bandgap polymer donor PTzBI-dF is demonstrated as an effectivemodulator for enhancing the crystallinity of the bulk heterojunction active layerscomposed of D18 derivatives blended with Y6, leading to dense and orderedmolecular packings, and thus, improves photoluminescence quenching properties.As a result, the photovoltaic devices exhibit reduced trap-assisted charge recombinationlosses, achieving an optimized power conversion efficiency of over 19%.Besides the efficiency enhancement, the devices comprised of PTzBI-dF as athird component simultaneously attain decreased current leakage, improved chargecarrier mobilities, and suppressed bimolecular charge recombination, leading toreduced energy losses. The advanced crystalline structures induced by PTzBI-dFand its characteristics, such as well-aligned energy level, and complementaryabsorption spectra, are ascribed to the promising performance improvements.Our findings suggest that donor phase engineering is a feasible approach to tuning the molecular packings in the active layer, providingguidelines for designing effective morphology modulators for high-performance organic solar cells.
Anhai Liang;Yuqing Sun;Sein Chung;Jiyeong Shin;Kangbo Sun;Chaofeng Zhu;Jingjing Zhao;Zhenmin Zhao;Yufei Zhong;Guangye Zhang;Kilwon Cho;Zhipeng Kan
Center On Nanoenergy Research,Institute of Science and Technology for Carbon Peak&Neutrality,School of Physical Science&Technology,Guangxi University,Nanning 530004,People’s Republic of ChinaCenter On Nanoenergy Research,Institute of Science and Technology for Carbon Peak&Neutrality,School of Physical Science&Technology,Guangxi University,Nanning 530004,People’s Republic of ChinaDepartment of Chemical Engineering,Pohang University of Science and Technology,Pohang 37673,South KoreaDepartment of Chemical Engineering,Pohang University of Science and Technology,Pohang 37673,South KoreaCollege of New Materials and New Energies,Shenzhen Technology University,Shenzhen 518118,People’s Republic of ChinaCenter On Nanoenergy Research,Institute of Science and Technology for Carbon Peak&Neutrality,School of Physical Science&Technology,Guangxi University,Nanning 530004,People’s Republic of ChinaCenter On Nanoenergy Research,Institute of Science and Technology for Carbon Peak&Neutrality,School of Physical Science&Technology,Guangxi University,Nanning 530004,People’s Republic of ChinaCenter On Nanoenergy Research,Institute of Science and Technology for Carbon Peak&Neutrality,School of Physical Science&Technology,Guangxi University,Nanning 530004,People’s Republic of ChinaZhejiang Engineering Research Center for Fabrication and Application of Advanced Photovoltaic Materials,School of Materials Science and Engineering,NingboTech University,Ningbo 315100,People’s Republic of ChinaCollege of New Materials and New Energies,Shenzhen Technology University,Shenzhen 518118,People’s Republic of ChinaDepartment of Chemical Engineering,Pohang University of Science and Technology,Pohang 37673,South KoreaCenter On Nanoenergy Research,Institute of Science and Technology for Carbon Peak&Neutrality,School of Physical Science&Technology,Guangxi University,Nanning 530004,People’s Republic of China State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures,Nanning 530004,People’s Republic of China
化学
Trap-assisted charge recombinationPhotoluminescenceMiscibilityCurrent leakagePower conversion efficiency
《Nano-Micro Letters》 2025 (3)
P.376-388,13
support from the National Natural Science Foundation of China(62275057)the Guangxi Natural Science Foundation(2023GXNSFFA026004 and 2022GXNSFDA035066)the Innovation Project of Guangxi Graduate Education(YCBZ2024034)Natural Science Foundation of Ningbo under grant(2022J149)Natural Science Foundation of Ningbo under grant(2022A-230-G)Portions of this research were carried out at the 3C SAXS-I and 9A U-SAXS beam lines of the Pohang Accelerator Laboratory(PLS-II),Republic of Korea.
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