Effects of water vapor and oxygen on non-fullerene small molecule acceptors

Wang, Chuanfei1; Ni, Shaofei2,3; Braun, Slawomir1; Fahlman, Mats1; Liu, Xianjie1

2019-01-28

10.1039/c8tc05475d

Journal of Materials Chemistry C   影响因子和分区

2050-7526

2050-7534

Due to the rapid development of non-fullerene acceptors (NFAs), the efficiency of organic solar cells is steadily being improved. The stability of organic solar cells also is expected to be enhanced with the introduction of the NFAs, yet the stability of NFAs themselves have been less investigated to date. In this paper, the stability of a set of typical NFAs was studied in situ employing photoelectron spectroscopy. The studied molecules show higher resistance to water vapor and thermal stress compared to fullerenes. For water vapor exposure, the highest occupied molecular orbital (HOMO) of NFAs undergoes only minor and reversible changes and the NFAs/substrate work function stays constant. Exposure to oxygen gas significantly modified the electronic structure of the NFAs and the effect was only partially reversible by annealing. However, the presence of water vapor was shown to slow down the degradation caused by oxygen. This is in stark contrast to fullerenes that undergo irreversible degradation upon water vapor exposure.

SCI ; EI

英语

其他

Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University[2009 00971]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied

WOS:000459571400007

ROYAL SOC CHEMISTRY

20190506448257

Electronic structure ; Fullerenes ; Molecular orbitals ; Molecules ; Nanostructured materials ; Organic solar cells ; Oxygen ; Photoelectron spectroscopy ; Solar cells

Solar Cells:702.3 ; Nanotechnology:761 ; Chemical Products Generally:804 ; Atomic and Molecular Physics:931.3

Web of Science

1.Linkoping Univ, IFM, Div Surface Phys & Chem, SE-58183 Linkoping, Sweden
2.South Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
3.Inst Chem Res Catalonia, Tarragona 43007, Spain

Wang, Chuanfei,Ni, Shaofei,Braun, Slawomir,et al. Effects of water vapor and oxygen on non-fullerene small molecule acceptors[J]. Journal of Materials Chemistry C,2019,7(4):879-886.

Wang, Chuanfei,Ni, Shaofei,Braun, Slawomir,Fahlman, Mats,&Liu, Xianjie.(2019).Effects of water vapor and oxygen on non-fullerene small molecule acceptors.Journal of Materials Chemistry C,7(4),879-886.

Wang, Chuanfei,et al."Effects of water vapor and oxygen on non-fullerene small molecule acceptors".Journal of Materials Chemistry C 7.4(2019):879-886.