Efficient solution processed D1-A-D2-A-D1 small molecules bulk heterojunction solar cells based on alkoxy triphenylamine and benzo[1,2-b:4,5-b’]thioph

doi:https://dx.doi.org/10.1016/j.orgel.2015.07.014

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Utilizad este identificador para citar o enlazar este documento: http://hdl.handle.net/2072/226213

dc.contributor.author	Kumara, Challuri Vijay
dc.contributor.author	Cabau, Lydia
dc.contributor.author	Koukaras, Emmanuel N.
dc.contributor.author	Sharma, Ganesh D.
dc.contributor.author	Palomares, Emilio
dc.date.accessioned	2018-01-15T16:03:27Z
dc.date.accessioned	2018-02-15T10:27:27Z
dc.date.available	2018-01-15T16:03:27Z
dc.date.available	2018-02-15T10:27:27Z
dc.date.issued	2015
dc.identifier.uri	http://hdl.handle.net/2072/226213
dc.identifier.uri	http://hdl.handle.net/2072/305746
dc.language.iso	eng
dc.publisher	Elsevier
dc.relation	MINECO
dc.relation	Severo Ochoa
dc.relation	Severo Ochoa Excellence Accreditation 2014-2018
dc.relation.ispartof	Organic Electronics
dc.subject.other	D1-A-D2-A-D1 molecules
dc.subject.other	Bulk heterojunction solar cell
dc.subject.other	Solvent additive
dc.subject.other	Thermal annealing
dc.subject.other	Power conversion efficiency
dc.title	Efficient solution processed D1-A-D2-A-D1 small molecules bulk heterojunction solar cells based on alkoxy triphenylamine and benzo[1,2-b:4,5-b’]thioph
dc.type	info:eu-repo/semantics/article
dc.relation.projectID	CTQ2013-47183-R
dc.relation.projectID	(SEV-2013-0319).
dc.identifier.doi	https://dx.doi.org/10.1016/j.orgel.2015.07.014
dc.rights.accessLevel	info:eu-repo/semantics/openAccess
dc.description.abstract	Two molecules denoted as VC96 and VC97 have been synthesized for efficient (g = 6.13% @ 100 mW/cm2 sun-simulated light) small molecule solution processed organic solar cells. These molecules have been designed with the D1-A-D2-A-D1 structure bearing different central donor unit, same benzothiadiazole (BT) as p-acceptor and end capping triphenylamine. Moreover, the optical and electrochemical properties (both experimental and theoretical) of these molecules have been systematically investigated. The solar cells prepared from VC96:PC71BM and VC97:PC71BM (1:2) processed from CF (chloroform) exhibit a PCE (power conversion efficiency) of g = 4.06% (Jsc = 8.36 mA/cm2, Voc = 0.90 V and FF = 0.54) and g = 3.12% (Jsc = 6.78 mA/cm2, Voc = 0.92 V and FF = 0.50), respectively. The higher PCE of the device with VC96 as compared to VC97 is demonstrated to be due to the higher hole mobility and broader IPCE spectra. The devices based on VC96:PC71BM and VC97:PC71BM processed with solvent additive (3 v% DIO, 1,8-diiodooctane) showed PCE of g = 5.44% and g = 4.72%, respectively. The PCE device of optimized VC96:PC71BM processed with DIO/CF (thermal annealed) has been improved up to 6.13% (Jsc = 10.72 mA/cm2, Voc = 0.88 V and FF = 0.61). The device optimization results from the improvement of the balanced charge transport and better nanoscale morphology induced by the solvent additive plus the thermal annealing.

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