Evaluation of Electron Donor Materials for Solution-Processed
Organic Solar Cells via a Novel Figure of Merit
Min, J (Min, Jie)[ 1,2 ] ; Luponosov, YN (Luponosov, Yuriy N.)[ 3 ] ; Cui, CH (Cui, Chaohua)[ 4 ] ; Kan, B (Kan, Bin)[ 5,6,7,8 ] ; Chen, HW (Chen, Haiwei)[ 2 ]; Wan, XJ (Wan, Xiangjian)[ 5,6,7,8 ] ; Chen, YS (Chen, Yongsheng)[ 5,6,7,8 ] ; Ponomarenko, SA (Ponomarenko, Sergei A.)[ 3,9 ] ; Li, YF (Li, Yongfang)[ 4 ] ; Brabec, CJ (Brabec, Christoph J.)[ 2,10 ]
ADVANCED
ENERGY MATERIALS, 2017, 7(18): 文献号: 1700465
DOI: 10.1002/aenm.201700465
WOS:000411182500023
Abstract
Organic
photovoltaic (OPV) technology offers many advantages, although no commercial
applications have been achieved after more than a decade of intensive research
and development. Several challenges have yet to be overcome including high
power conversion efficiency (PCE), good process-ability, low cost, and
excellent long-term stability, and so on. In this article, these fundamental
challenges are significantly addressed by surveying and analyzing a new merit
factor for material applied accessibility containing three parameters:
synthetic complexity, device efficiency, and photostability. Thirty-five donor
small molecules are introduced to assess their synthetic accessibility.
Furthermore, the PCEs and device photostability of these molecules are carried out,
and further measured under one sun illumination within 200 h, respectively.
Combining with the characteristics of these three factors, investigated
molecules are ranked according to an industrial figure of merit (i-FOM), while
some guidelines for the material design and synthesis are given. It is
suggested that a PCE of >14% and an i-FOM of >20% via active material
engineering are realistic for possible industry future of OPV. Along with the
systematic study, it is believed that this i-FOM can be taken into
consideration at an early stage of molecular design and provides valuable
insight for efficient evaluation of photovoltaic materials for possible
commercial applications.
