An architected silk fibroin-lignin multilayer with deep-level trapping states for high-output triboelectric nanogenerators

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dc.contributor.authorSuktep, Natdanai
dc.contributor.authorSae-tang, Chanachot
dc.contributor.authorUkasi, Sirinya
dc.contributor.authorPakawanit, Phakkhananan
dc.contributor.authorSupansomboon, Supitcha
dc.contributor.authorKaewkhao, Jakrapong
dc.contributor.authorVittayakorn, Wanwilai
dc.contributor.authorMaluangnont, Tosapol
dc.contributor.authorChiu, Te Wei
dc.contributor.authorCharoonsuk, Thitirat
dc.contributor.authorVittayakorn, Naratip
dc.date.accessioned2026-08-06T10:54:56Z
dc.date.available2026-08-06T10:54:56Z
dc.date.issued2026-03-01
dc.description.abstractBiopolymer-based triboelectric nanogenerators (B-TENGs) are promising power sources for sustainable and flexible electronics, but their performance is often limited by severe charge recombination at the triboelectric interface. To overcome this critical bottleneck, we report an architected multilayer B-TENG featuring a silk fibroin (SF)/MgAl LDH composite as the charge-generating layer and, to our knowledge, for the first time, a lignin-functionalized SF film as a dedicated charge-trapping layer. The strategic incorporation of lignin, an abundant and sustainable biopolymer, introduces deep-level electronic trapping states originating from its abundant aromatic moieties. That effectively suppresses interfacial charge recombination and prolongs charge lifetime. By optimizing the contents of MgAl LDH and lignin, the device achieves a measured open circuit output voltage ( V <inf> OC </inf>) and current density ( J <inf> SC </inf>) of 96 V and 6.56 μA/cm<sup>3</sup>, with a maximum output power ( P <inf> max </inf>) of 205 μW, corresponding to a power density of 22.7 μW/cm<sup>2</sup>. We also propose a mechanistic linking of deep-level traps to prolonged charge lifetime and increased net transferable charge. The interface-engineering strategy demonstrated here paves the way for developing high-performance and sustainable biopolymer-based TENGs and motion sensors.
dc.identifier.citationMaterials Today Nano, 33, 2026
dc.identifier.doi10.1016/j.mtnano.2025.100724
dc.identifier.issn25888420
dc.identifier.other2-s2.0-105023668637
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/17951
dc.sourceMaterials Today Nano
dc.subjectCharge trapping
dc.subjectInterface engineering
dc.subjectLignin
dc.subjectSilk fibroin
dc.subjectSustainable electronics
dc.subjectTriboelectric nanogenerator (TENG)
dc.titleAn architected silk fibroin-lignin multilayer with deep-level trapping states for high-output triboelectric nanogenerators
dc.typeArticle

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