nz6b00291_si_001.pdf (1.38 MB)
Ternary Polymer–Perylenediimide–Carbon Nanotube Photovoltaics with High Efficiency and Stability under Super-Solar Irradiation
journal contribution
posted on 2016-08-17, 00:00 authored by Tejas
A. Shastry, Patrick E. Hartnett, Michael R. Wasielewski, Tobin
J. Marks, Mark C. HersamPolymer solar cells
(PSCs) have achieved power conversion efficiencies
exceeding 10%, but their performance has been limited under concentrated
sunlight because of poor stability and recombination processes despite
their potential for low-cost concentrated solar power. Recently, ternary
polymer solar cell blends have been explored as a strategy to improve
PSC performance; however, this approach has been demonstrated only
for polymer–fullerene solar cells with organic ternary additives
and has not addressed stability issues under supersolar irradiation.
Here, we present the first polymer solar cells comprising ternary
blends of high efficiency polymers, nonfullerene perylenediimide acceptors,
and semiconducting single-walled carbon nanotube additives. We find
that the addition of carbon nanotubes reduces efficiency-degrading
recombination and improves performance and photostability, most notably
under concentrated sunlight exceeding 10 suns. The utilization of
carbon nanomaterials as ternary additives in organic photovoltaics
creates new opportunities for integrating solution-processed solar
cells with energy conversion systems based on solar concentrators.