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dc.contributor.authorLai, Yun-Yuen_US
dc.contributor.authorLiao, Ming-Hungen_US
dc.contributor.authorChen, Yen-Tingen_US
dc.contributor.authorCao, Fong-Yien_US
dc.contributor.authorHsu, Chain-Shuen_US
dc.contributor.authorCheng, Yen-Juen_US
dc.date.accessioned2015-07-21T08:27:42Z-
dc.date.available2015-07-21T08:27:42Z-
dc.date.issued2014-11-26en_US
dc.identifier.issn1944-8244en_US
dc.identifier.urihttp://dx.doi.org/10.1021/am505616xen_US
dc.identifier.urihttp://hdl.handle.net/11536/124122-
dc.description.abstractBis-adduct fullerenes surrounded by two insulating addends sterically attenuate intermolecular interaction and cause inferior electron transportation. In this research, we have designed and synthesized a new class of bis-adduct fullerene materials, methylphenylmethano-C-60 bis-adduct (MPC(60)BA), methylthienylmethano-C-60 bis-adduct (MTC(60)BA), methylphenylmethano-C-70 bis-adduct (MPC(70)BA), and methylthienylmethano-C-70 bis-adduct (MTC(70)BA), functionalized with two compact phenylmethylmethano and thienylmethylmethano addends via cyclopropyl linkages. These materials with much higher-lying lowest unoccupied molecular orbital (LUMO) energy levels successfully enhanced the V-oc values of the P3HT-based solar cell devices. The compact phenylmethylmethano and thienylmethylmethano addends to promote fullerene intermolecular interactions result in aggregation-induced phase separation as observed by the atomic force microscopy (AFM) and transmission electron microscopy (TEM) images of the poly(3-hexylthiophene-2,5-diyl) (P3HT)/bis-adduct fullerene thin films. The device based on the P3HT/MTC(60)BA blend yielded a V-oc of 0.72 V, a J(sc) of 5.87 mA/cm(2), and a fill factor (FF) of 65.3%, resulting in a power conversion efficiency (PCE) of 2.76%. The unfavorable morphologies can be optimized by introducing a solvent additive to fine-tune the intermolecular interactions. 1-Chloronaphthalene (CN) having better ability to dissolve the bis-adduct fullerenes can homogeneously disperse the fullerene materials into the P3HT matrix. Consequently, the aggregated fullerene domains can be alleviated to reach a favorable morphology. With the assistance of CN additive, the P3HT/MTC(60)BA-based device exhibited enhanced characteristics (a V-oc of 0.78 V, a J(sc) of 9.04 mA/cm(2), and an FF of 69.8%), yielding a much higher PCE of 4.92%. More importantly, the additive-assisted morphological optimization is consistently effective to all four compact bis-adduct fullerenes regardless of the methylphenylmethano or methylthienylmethano scaffolds as well as C-60 or C-70 core structures. Through the extrinsic additive treatment, these bis-adduct fullerene materials with compact architectures show promise for high-performance polymer solar cells.en_US
dc.language.isoen_USen_US
dc.subjectbis-adduct fullerenesen_US
dc.subjectpolymersen_US
dc.subjectadditiveen_US
dc.subjectmorphologyen_US
dc.subjectaggregationen_US
dc.subjectsolar cellsen_US
dc.titleCompact Bis-Adduct Fullerenes and Additive-Assisted Morphological Optimization for Efficient Organic Photovoltaicsen_US
dc.typeArticleen_US
dc.identifier.doi10.1021/am505616xen_US
dc.identifier.journalACS APPLIED MATERIALS & INTERFACESen_US
dc.citation.issue22en_US
dc.citation.spage20102en_US
dc.citation.epage20109en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.identifier.wosnumberWOS:000345721400079en_US
dc.citation.woscount0en_US
Appears in Collections:Articles