期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 11, 期 2, 页码 417-428出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ee02983g
关键词
-
资金
- Welsh Assembly Government
- National Research Network in Advanced Engineering and Materials
- European Commission's CHEETAH Project (FP7-Energy) [609788]
- EPSRC [EP/M025020/1, EP/K030671/1]
- Welsh Assembly Government Ser Cymru II fellowship
- Imperial College Junior Research Fellowship
- CNPq-Brazil PDE fellowship [207507/2014-7]
- EPSRC Doctoral Training Centre in Plastic Electronics [EP/G037515/1]
- EPSRC Doctoral Training Centre in Theory and Simulation of Materials [EP/G036888/1]
- EPSRC [EP/J021199/1, EP/N020863/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M025020/1, 1376017, 1375475, EP/J021199/1, EP/N020863/1, 1565500, EP/K030671/1] Funding Source: researchfish
Environmental stability is a common challenge for the commercialisation of low cost, encapsulation-free organic opto-electronic devices. Understanding the role of materials degradation is the key to address this challenge, but most such studies have been limited to conjugated polymers. Here we quantitatively study the role of the common fullerene derivative PCBM in limiting the stability of benchmark organic solar cells, showing that a minor fraction (<1%) of photo-oxidised PCBM, induced by short exposure to either solar or ambient laboratory lighting conditions in air, consistent with typical processing and operating conditions, is sufficient to compromise device performance severely. We identify the effects of photo-oxidation of PCBM on its chemical structure, and connect this to specific changes in its electronic structure, which significantly alter the electron transport and recombination kinetics. The effect of photo-oxidation on device current-voltage characteristics, electron mobility and density of states could all be explained with the same model of photoinduced defects acting as trap states. Our results demonstrate that the photochemical instability of PCBM and chemically similar fullerenes remains a barrier for the commercialisation of organic opto-electronic devices.
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