Molecular orientation-dependent energetic shifts in solution-processed non-fullerene acceptors and their impact on organic photovoltaic performance.
Molecular orientation-dependent energetic shifts in solution-processed non-fullerene acceptors and their impact on organic photovoltaic performance.
复制标题
DOI：
10.1038/s41467-023-37234-0
复制
发表时间：
2023-04-04
影响因子：
16.6
通讯作者：
Kim, Ji-Seon
中科院分区：
文献类型：
--
作者：
Fu, Yuang;Lee, Tack Ho;Chin, Yi-Chun;Pacalaj, Richard A. A.;Labanti, Chiara;Park, Song Yi;Dong, Yifan;Cho, Hye Won;Kim, Jin Young;Minami, Daiki;Durrant, James R. R.;Kim, Ji-Seon
非富勒烯受体（nfa）在最先进的有机光伏（opv）中经常表现出强烈的四极矩，这对材料的能量学有很大的影响。在此，我们表明，通过使用不同的加工溶剂，将Y6（一种原型NFA）的取向从正面改变为更侧面，会导致高达210 meV的显著能量转移。在PM6聚合物供体的双分子层和块状异质结（BHJ）器件中研究了这种能量转移对OPV性能的影响。由于四极矩引起的能带弯曲，器件的电子带隙和非双晶复合率取决于双层和BHJ器件中的Y6取向。在其他常见的聚合物/NFA共混物中也观察到类似的能量转移，这与NFA四极矩密切相关。这项工作证明了NFA四倍矩和分子取向对材料能量学的关键影响，从而影响了高性能opv的效率。具有大四极矩的非富勒烯受体强烈影响薄膜的能量学。在这里，作者展示了使用不同溶剂将Y6的取向从正面改变到更侧面时的显著能量转变（>200 meV）及其对有机光伏的关键影响。
The non-fullerene acceptors (NFAs) employed in state-of-art organic photovoltaics (OPVs) often exhibit strong quadrupole moments which can strongly impact on material energetics. Herein, we show that changing the orientation of Y6, a prototypical NFA, from face-on to more edge-on by using different processing solvents causes a significant energetic shift of up to 210 meV. The impact of this energetic shift on OPV performance is investigated in both bilayer and bulk-heterojunction (BHJ) devices with PM6 polymer donor. The device electronic bandgap and the rate of non-geminate recombination are found to depend on the Y6 orientation in both bilayer and BHJ devices, attributed to the quadrupole moment-induced band bending. Analogous energetic shifts are also observed in other common polymer/NFA blends, which correlates well with NFA quadrupole moments. This work demonstrates the key impact of NFA quadruple moments and molecular orientation on material energetics and thereby on the efficiency of high-performance OPVs. Non-fullerene acceptors with large quadrupole moments strongly affect thin-film energetics. Here, the authors show a significant energetic shift (>200 meV) of Y6 upon changing its orientation from face-on to more edge-on using different solvents and its critical impact on organic photovoltaics.
登录
查看更多内容
影响因子：
41.2
作者：
Duhm, Steffen;Heimel, Georg;Koch, Norbert
通讯作者：
Koch, Norbert
单组分%20无卤%20溶剂处理%20高性能%20有机%20太阳能%20电池%20模块%20with%20效率%20over%2014%
影响因子：
39.8
作者：
Dong, Sheng;Jia, Tao;Huang, Fei
通讯作者：
Huang, Fei
影响因子：
16.6
作者：
Dong, Yifan;Nikolis, Vasileios C.;Vandewal, Koen
通讯作者：
Vandewal, Koen
影响因子：
2.2
作者：
Bochevarov, Art D.;Harder, Edward;Friesner, Richard A.
通讯作者：
Friesner, Richard A.
影响因子：
3.7
作者：
Credgington, Dan;Liu, Shun-Wei;Durrant, James R.
通讯作者：
Durrant, James R.