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dc.contributor.authorZheng, Zhong
dc.contributor.authorWang, Rong
dc.contributor.authorYao, Huifeng
dc.contributor.authorXie, Shenkun
dc.contributor.authorZhang, Yuan
dc.contributor.authorHou, Jianhui
dc.contributor.authorZhou, Huiqiong
dc.contributor.authorTang, Zhiyong
dc.description.abstractIn this communication, we present a study to investigate interfacial characteristics modulated by electron extraction layers (EEL) comprising of a polyamino acid α-poly-L-lysine (α-PLL) in fullerene-free organic solar cells (OSC) based on narrow-band-gap PTB7-Th:IEICO-4 heterojunctions. Benefitting from effective interfacial modifications with the α-PLL EEL, PTB7-Th:IEICO-4F solar cells receive a considerable boost in the short-circuit current (26.6 mA/cm2) and ultimate power conversion efficiencies exceeding 12%, which is a result of promoted charge extraction. Aided by combinatorial analyses using electron spin resonance spectroscopy, angle-resolved X-ray photoelectron spectroscopy together with charge transport measurements, we found that the interfacial doping occurs at the α-PLL/IEICO-4F interface, possibly due to the low steric hindrance of the bared primary amines and non-conjugated backbones in α-PLL. The interface strategy with α-PLL displays a universal applicability, enabling to produce a series of high efficiency PCBM or non-fullerene OSCs with different device architectures. This work enriches fundamental insights into key interfacial processes and provides a promising pathway utilizing wide-accessible biomaterials to attain high performance OSCs with emerging fullerene-free photovoltaic materials.
dc.relation.ispartofjournalNano Energy
dc.subject.fieldofresearchMacromolecular and Materials Chemistry
dc.subject.fieldofresearchMaterials Engineering
dc.subject.keywordsScience & Technology
dc.subject.keywordsPhysical Sciences
dc.subject.keywordsChemistry, Physical
dc.subject.keywordsNanoscience & Nanotechnology
dc.titlePolyamino acid interlayer facilitates electron extraction in narrow band gap fullerene-free organic solar cells with an outstanding short-circuit current
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationZheng, Z; Wang, R; Yao, H; Xie, S; Zhang, Y; Hou, J; Zhou, H; Tang, Z, Polyamino acid interlayer facilitates electron extraction in narrow band gap fullerene-free organic solar cells with an outstanding short-circuit current, Nano Energy, 2018, 50, pp. 169-175
gro.hasfulltextNo Full Text
gro.griffith.authorTang, Zhiyong

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