课题组与中科院化学所姚建年院士、首都师范大学付红兵教授，厦门大学梁万珍教授课题组合作的给受体结构激子裂分材料研究发表在CCS Chem.上。
Singlet fission (SF) has attracted much attention on account of its great potential for applications in high efficiency solar energy conversion. The major roadblock to realize this potential is rooted in the limited availability of practical SF material with strong absorption, suitable triplet energy level, an efficient SF process, and good chemical stability. Quinoidal structures feature an innate diradical character, which endows these skeletons with SF potential yet results in some structural instability. Herein, we propose a novel molecular design strategy for practical SF materials based on donor/acceptor decorated quinoidal structures. This design strategy could allow the quinoidal structures to afford strong absorption, suitable energy levels, efficient SF properties, and excellent stability. Using transient spectroscopy techniques and theoretical simulation, a new SF chromophore based on a para-azaquinodimethane skeleton ( AQTT) was successfully developed via the proposed design strategy. An ultrafast SF process, 165% triplet yield, suitable triplet energy of ∼1.1 eV, strong visible-light-absorption coefficients ∼105 M−1cm−1, and good chemical stability make such material a promising SF candidate for practical photovoltaic applications.
文章链接：https://www.chinesechemsoc.org/doi/10.31635/ccschem.021.202101199
