期刊
ADVANCED MATERIALS
卷 30, 期 16, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201706363
关键词
fused ring electron acceptors; nonfullerene solar cells; organic solar cells; photophysics
类别
资金
- NSFC [21734001, 51761165023, 21504058, 11474214, 21504066]
- Ministry of Science and Technology of China [2014CB932600, 2016YFA0200700]
- Office of Naval Research [N000141410221]
- NSF [DMR-1507249]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
- Rutherford Discovery fellowship
- Knut and Alice Wallenberg Foundation
- Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009-00971]
Relative to electron donors for bulk heterojunction organic solar cells (OSCs), electron acceptors that absorb strongly in the visible and even near-infrared region are less well developed, which hinders the further development of OSCs. Fullerenes as traditional electron acceptors have relatively weak visible absorption and limited electronic tunability, which constrains the optical and electronic properties required of the donor. Here, high-performance fullerene-free OSCs based on a combination of a medium-bandgap polymer donor (FTAZ) and a narrow-bandgap nonfullerene acceptor (IDIC), which exhibit complementary absorption, matched energy levels, and blend with pure phases on the exciton diffusion length scale, are reported. The single-junction OSCs based on the FTAZ:IDIC blend exhibit power conversion efficiencies up to 12.5% with a certified value of 12.14%. Transient absorption spectroscopy reveals that exciting either the donor or the acceptor component efficiently generates mobile charges, which do not suffer from recombination to triplet states. Balancing photocurrent generation between the donor and nonfullerene acceptor removes undesirable constraints on the donor imposed by fullerene derivatives, opening a new avenue toward even higher efficiency for OSCs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据