Diamond encapsulated photovoltaics for transdermal power delivery

Simple item page
dc.contributor.authorAhnood, A.
dc.contributor.authorFox, K.E
dc.contributor.authorApollo, N.V.
dc.contributor.authorLohrmann, A.
dc.contributor.authorGarrett, D.J.
dc.contributor.authorNayagam, D.A.X
dc.contributor.authorKarle, T.
dc.contributor.authorStacey, A.
dc.contributor.authorAbberton, K.M
dc.contributor.authorMorrison, W.A
dc.contributor.authorBlakers, A.
dc.contributor.authorPrawer, S.
dc.date.accessioned2015-12-24T01:26:19Z
dc.date.available2015-12-24T01:26:19Z
dc.date.issued2016-03
dc.description.abstractA safe, compact and robust means of wireless energy transfer across the skin barrier is a key requirement for implantable electronic devices. One possible approach is photovoltaic (PV) energy delivery using optical illumination at near infrared (NIR) wavelengths, to which the skin is highly transparent. In the work presented here, a subcutaneously implantable silicon PV cell, operated in conjunction with an external NIR laser diode, is developed as a power delivery system. The biocompatibility and long-term biostability of the implantable PV is ensured through the use of an hermetic container, comprising a transparent diamond capsule and platinum wire feedthroughs. A wavelength of 980nm is identified as the optimum operating point based on the PV cell's external quantum efficiency, the skin's transmission spectrum, and the wavelength dependent safe exposure limit of the skin. In bench-top experiments using an external illumination intensity of 0.7W/cm(2), a peak output power of 2.7mW is delivered to the implant with an active PV cell dimension of 1.5×1.5×0.06mm(3). This corresponds to a volumetric power output density of ∼20mW/mm(3), significantly higher than power densities achievable using inductively coupled coil-based approaches used in other medical implant systems. This approach paves the way for further ministration of bionic implants.en_US
dc.identifier.citationAhnood, A., K. E. Fox, N. V. Apollo, A. Lohrmann, D. J. Garrett, D. A. X. Nayagam, T. Karle, A. Stacey, K. M. Abberton, W. A. Morrison, A. Blakers and S. Prawer (2015). Diamond encapsulated photovoltaics for transdermal power delivery. Biosensors and Bioelectronics, 77, 589-97en_US
dc.identifier.urihttp://repository.bionicsinstitute.org:8080/handle/123456789/174
dc.publisherElsevier B.V.en_US
dc.subjectenergy harvestingen_US
dc.subjectphotovoltaicsen_US
dc.subjecttransdermal power deliveryen_US
dc.titleDiamond encapsulated photovoltaics for transdermal power deliveryen_US
dc.typeArticleen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
2015Ahnood - cover.pdf
Size:
124.53 KB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
BI publications