Sunlight‐Triggerable Transient Energy Harvester and Sensors Based on Triboelectric Nanogenerator Using Acid‐Sensitive Poly(phthalaldehyde). (1st October 2019)

• Record Type: Journal Article
• Authors: Wu, Changsheng; Jiang, Jisu; Guo, Hengyu; Pu, Xianjie; Liu, Lisha; Ding, Wenbo; Kohl, Paul A.; Wang, Zhong Lin
• Is Part Of: Advanced Electronic Materials. Volume 5:Number 12(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-10-01
• Subjects: poly(phthalaldehyde) -- sensors -- transient electronics -- triboelectric nanogenerators; Materials -- Electric properties -- Periodicals; Materials science -- Periodicals; Magnetic materials -- Periodicals; Electronic apparatus and appliances -- Periodicals; 537
• DOI: 10.1002/aelm.201900725
• Languages: English
• ISSNs: 2199-160X

Abstract

Abstract: Transient electronics that disintegrate via material dissolution or depolymerization under certain stimuli have great potential in biomedical and military applications. The triboelectric nanogenerator (TENG), an emerging mechanical energy harvesting technology with great flexibility in material choices, is promising in offering transient power sources. Previously reported transient energy harvesters using biodegradable polymers require solution‐based degradation and have limited applications in non‐biological scenarios. A short time span, sunlight‐triggered degradable TENG is developed. The main substrate includes an acid‐sensitive poly(phthalaldehyde) (PPHA), a photoacid generator (PAG), and a photosensitizer (PS). Through photo‐induced electron transfer, the ultraviolet radiation absorbed by the PS is transferred to the PAG to generate photoacids that trigger the depolymerization of PPHA. Transient TENG‐based mechanical energy harvesters and touch/acoustic sensors are successfully demonstrated by embedding silver nanowires onto the PPHA‐based films. The fabricated devices degrade rapidly under winter sunlight. The degradation rate can be further tuned via changing the ratio of photosensitive agents. This work not only broadens the applicability of TENG as transient power sources and sensors, but also extends the use of transient functional polymers toward advanced energy and sensing applications. Abstract : Sunlight‐triggerable transient electronics based on triboelectric nanogenerator (TENG) are reported. The triboelectric properties of the substrate material based on acid‐sensitive poly(phthalaldehyde) are investigated. Transient TENG‐based mechanical energy harvesters and touch/acoustic sensors are successfully demonstrated. The use of both TENG and transient polymers in advanced energy and sensing applications is suggested.