dc.contributor.author | Cha, H | |
dc.contributor.author | Wu, J | |
dc.contributor.author | Wadsworth, A | |
dc.contributor.author | Nagitta, J | |
dc.contributor.author | Limbu, S | |
dc.contributor.author | Pont, S | |
dc.contributor.author | Li, Z | |
dc.contributor.author | Searle, J | |
dc.contributor.author | Wyatt, MF | |
dc.contributor.author | Baran, D | |
dc.contributor.author | Kim, J-S | |
dc.contributor.author | McCulloch, I | |
dc.contributor.author | Durrant, JR | |
dc.date.accessioned | 2020-05-29T10:46:06Z | |
dc.date.available | 2020-05-29T10:46:06Z | |
dc.date.issued | 2017-09 | |
dc.identifier.citation | Cha, Hyojung et al. "An Efficient, “Burn In” Free Organic Solar Cell Employing A Nonfullerene Electron Acceptor". Advanced Materials, vol 29, no. 33, 2017, p. 1701156. Wiley, doi:10.1002/adma.201701156. Accessed 29 May 2020. | en_US |
dc.identifier.uri | https://qmro.qmul.ac.uk/xmlui/handle/123456789/64471 | |
dc.description.abstract | A comparison of the efficiency, stability, and photophysics of organic solar cells employing poly[(5,6-difluoro-2,1,3-benzothiadiazol-4,7-diyl)-alt-(3,3'″-di(2-octyldodecyl)-2,2';5',2″;5″,2'″-quaterthiophen-5,5'″-diyl)] (PffBT4T-2OD) as a donor polymer blended with either the nonfullerene acceptor EH-IDTBR or the fullerene derivative, [6,6]-phenyl C71 butyric acid methyl ester (PC71 BM) as electron acceptors is reported. Inverted PffBT4T-2OD:EH-IDTBR blend solar cell fabricated without any processing additive achieves power conversion efficiencies (PCEs) of 9.5 ± 0.2%. The devices exhibit a high open circuit voltage of 1.08 ± 0.01 V, attributed to the high lowest unoccupied molecular orbital (LUMO) level of EH-IDTBR. Photoluminescence quenching and transient absorption data are employed to elucidate the ultrafast kinetics and efficiencies of charge separation in both blends, with PffBT4T-2OD exciton diffusion kinetics within polymer domains, and geminate recombination losses following exciton separation being identified as key factors determining the efficiency of photocurrent generation. Remarkably, while encapsulated PffBT4T-2OD:PC71 BM solar cells show significant efficiency loss under simulated solar irradiation ("burn in" degradation) due to the trap-assisted recombination through increased photoinduced trap states, PffBT4T-2OD:EH-IDTBR solar cell shows negligible burn in efficiency loss. Furthermore, PffBT4T-2OD:EH-IDTBR solar cells are found to be substantially more stable under 85 °C thermal stress than PffBT4T-2OD:PC71 BM devices. | en_US |
dc.language | eng | |
dc.publisher | Wiley | en_US |
dc.relation.ispartof | Adv Mater | |
dc.subject | charge separation | en_US |
dc.subject | nonfullerene acceptors | en_US |
dc.subject | organic solar cells | en_US |
dc.subject | trap assisted recombination | en_US |
dc.title | An Efficient, "Burn in" Free Organic Solar Cell Employing a Nonfullerene Electron Acceptor. | en_US |
dc.type | Article | en_US |
dc.rights.holder | © 2017 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim | |
dc.identifier.doi | 10.1002/adma.201701156 | |
pubs.author-url | https://www.ncbi.nlm.nih.gov/pubmed/28657152 | en_US |
pubs.issue | 33 | en_US |
pubs.notes | Not known | en_US |
pubs.publication-status | Published | en_US |
pubs.volume | 29 | en_US |
rioxxterms.funder | Default funder | en_US |
rioxxterms.identifier.project | Default project | en_US |