Citation

BibTex format

@article{Baran:2016:10.1038/nmat4797,
author = {Baran, D and Ashraf, RS and Hanifi, DA and Abdelsamie, M and Gasparini, N and Röhr, JA and Holliday, S and Wadsworth, A and Lockett, S and Neophytou, M and Emmott, CJ and Nelson, J and Brabec, CJ and Amassian, A and Salleo, A and Kirchartz, T and Durrant, JR and McCulloch, I},
doi = {10.1038/nmat4797},
journal = {Nature Materials},
pages = {363--369},
title = {Reducing the efficiency-stability-cost gap of organic photovoltaics with highly efficient and stable small molecule acceptor ternary solar cells},
url = {http://dx.doi.org/10.1038/nmat4797},
volume = {16},
year = {2016}
}
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TY  - JOUR
AB  - 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.
AU  - Baran,D
AU  - Ashraf,RS
AU  - Hanifi,DA
AU  - Abdelsamie,M
AU  - Gasparini,N
AU  - Röhr,JA
AU  - Holliday,S
AU  - Wadsworth,A
AU  - Lockett,S
AU  - Neophytou,M
AU  - Emmott,CJ
AU  - Nelson,J
AU  - Brabec,CJ
AU  - Amassian,A
AU  - Salleo,A
AU  - Kirchartz,T
AU  - Durrant,JR
AU  - McCulloch,I
DO  - 10.1038/nmat4797
EP  - 369
PY  - 2016///
SN  - 1476-4660
SP  - 363
TI  - Reducing the efficiency-stability-cost gap of organic photovoltaics with highly efficient and stable small molecule acceptor ternary solar cells
T2  - Nature Materials
UR  - http://dx.doi.org/10.1038/nmat4797
UR  - http://www.ncbi.nlm.nih.gov/pubmed/27869824
UR  - https://www.nature.com/articles/nmat4797
UR  - http://hdl.handle.net/10044/1/43989
VL  - 16
ER  -
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