Reducing the efficiency-stability-cost gap of organic photovoltaics with highly efficient and stable small molecule acceptor ternary solar cells.

Title: Reducing the efficiency-stability-cost gap of organic photovoltaics with highly efficient and stable small molecule acceptor ternary solar cells.
Author(s): Baran, D
Ashraf, RS
Hanifi, DA
Abdelsamie, M
Gasparini, N
Röhr, JA
Holliday, S
Wadsworth, A
Lockett, S
Neophytou, M
Emmott, CJ
Nelson, J
Brabec, CJ
Amassian, A
Salleo, A
Kirchartz, T
Durrant, JR
McCulloch, I
Item Type: Journal Article
Abstract: Technological deployment of organic photovoltaic modules requires improvements in device light-conversion efficiency and stability while keeping material costs low. Here we demonstrate highly efficient and stable solar cells using a ternary approach, wherein two non-fullerene acceptors are combined with both a scalable and affordable donor polymer, poly(3-hexylthiophene) (P3HT), and a high-efficiency, low-bandgap polymer in a single-layer bulk-heterojunction device. The addition of a strongly absorbing small molecule acceptor into a P3HT-based non-fullerene blend increases the device efficiency up to 7.7 ± 0.1% without any solvent additives. The improvement is assigned to changes in microstructure that reduce charge recombination and increase the photovoltage, and to improved light harvesting across the visible region. The stability of P3HT-based devices in ambient conditions is also significantly improved relative to polymer:fullerene devices. Combined with a low-bandgap donor polymer (PBDTTT-EFT, also known as PCE10), the two mixed acceptors also lead to solar cells with 11.0 ± 0.4% efficiency and a high open-circuit voltage of 1.03 ± 0.01 V.
Publication Date: 21-Nov-2016
Date of Acceptance: 13-Oct-2016
URI: http://hdl.handle.net/10044/1/43989
DOI: https://dx.doi.org/10.1038/nmat4797
ISSN: 1476-4660
Publisher: Nature Publishing Group
Start Page: 363
End Page: 369
Journal / Book Title: Nature Materials
Volume: 16
Copyright Statement: © 2016 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Commission of the European Communities
Commission of the European Communities
Commission of the European Communities
Funder's Grant Number: EP/K030671/1
604397
PIRSES-GA-2013-612538
610115
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Materials Science
Physics
OPEN-CIRCUIT VOLTAGE
NON-FULLERENE-ACCEPTOR
POLYMER
EFFICIENT
PERFORMANCE
BLEND
MORPHOLOGY
IMPROVEMENT
P3HT/PCBM
Nanoscience & Nanotechnology
MD Multidisciplinary
Publication Status: Published
Conference Place: England
Appears in Collections:Physics
Chemistry
Experimental Solid State
Centre for Environmental Policy
Faculty of Natural Sciences



Items in Spiral are protected by copyright, with all rights reserved, unless otherwise indicated.

Creative Commons