2018
DOI: 10.1149/2.0141808jes
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Integrated Flexible Conversion Circuit between a Flexible Photovoltaic and Supercapacitors for Powering Wearable Sensors

Abstract: Integration of an organic photovoltaic (PV) with carbon-based supercapacitors (SCs) into a system for solar energy harvesting and storage is interesting for off-grid applications such as mobile electronics and sensor systems. Presented here is a conversion and control circuit (CC) on a flexible polyimide substrate in an integrated flexible energy harvesting and storage device compatible with roll-to-roll manufacturing (R2R). The CC is capable of PV max power-point tracking, DC-DC voltage boost of the PV output… Show more

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Cited by 26 publications
(18 citation statements)
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“…This finding complements previous reports concerning the impact of OPV layer microstructure on the efficiency of free charge generation. In model systems of poly(3-hexylthiophene-2,5-diyl) (P3HT): [6,6]-phenyl-C 61 butyric acid methyl ester (PCBM[60]) blend films, fully separated charges are produced efficiently when medium-sized ordered phases of P3HT and PCBM[60] exist in the OPV blend that prevent geminate recombination. 13,14 At present, we show how a comparable domain size of the OPV blend components minimizes the bimolecular charge recombination events.…”
Section: ■ Discussionmentioning
confidence: 99%
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“…This finding complements previous reports concerning the impact of OPV layer microstructure on the efficiency of free charge generation. In model systems of poly(3-hexylthiophene-2,5-diyl) (P3HT): [6,6]-phenyl-C 61 butyric acid methyl ester (PCBM[60]) blend films, fully separated charges are produced efficiently when medium-sized ordered phases of P3HT and PCBM[60] exist in the OPV blend that prevent geminate recombination. 13,14 At present, we show how a comparable domain size of the OPV blend components minimizes the bimolecular charge recombination events.…”
Section: ■ Discussionmentioning
confidence: 99%
“…Bulk heterojunction organic photovoltaic (OPV) devices 1,2 offer a promising route toward fabrication of low-cost solar cells of high efficiency, 3 capable to support several technologically important applications including building integrated photovoltaics, 4 indoor power generation for portable devices, 5 and low-power driven wearable electronic circuits. 6 Typical OPV device geometries comprise thin photoactive layers of blend systems prepared by electron-donating polymeric matrices mixed with electron accepting molecules. 7 Following light absorption by the OPV film, photo-induced charge-transfer (CT) reactions at a large number of donor/acceptor interfaces facilitate the formation of electrostatically correlated electron− hole pairs, most widely defined as interfacial CT states.…”
Section: ■ Introductionmentioning
confidence: 99%
“…Since the wearable sensors should be lightweight and simple, the low energy wireless system such as Zigbee, radiofrequency identification (RFID), and low energy Bluetooth are preferable. The power system of wearable devices can be pursued using wearable batteries, 15 supercapacitor, 155 and bio-battery/fuel cell 156 for energy storage while wearable photovoltaic 155 and kinetic energy harvester (e.g., piezoelectric, electrostatic, and electromagnetic) 157 for energy harvesting. The wearable batteries have been commercially available based on zinc air batteries for hearing aid.…”
Section: Discussionmentioning
confidence: 99%
“…Xu and co-workers [55] prepared a CH 3 NH 3 PbI 3based solar cell with a polypyrrole-based supercapacitor and evaluated its performance. The maximum PCE was reported to be 13.6% and the overall storage efficiency was 10% [81]. Another work fabricated an integrated device based on printable perovskite solar cells and a supercapacitor with a PEDOT-carbon cathode and anode.…”
Section: Effectiveness Of the Integrationmentioning
confidence: 99%