Printing piezoelectric materials for energy harvesting applications K.S.Kaur1, D.P.Banks1, J.S.Stewart2, M.Feinäugle1, T.C.May-Smith1, M.Nagel2, R.Torah3, C.L.Sones1, T.Lippert2, N.White3, R.W.Eason1 1Optoelectronics 2Paul
Research Centre (ORC), University of Southampton, SO17 1BJ, UK
Scherrer Institut, 5232 Villigen-PSI, Switzerland 3Electronics and Computer Sciences (ECS), University of Southampton, SO17 1BJ, UK
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Outline Introduction fs-DRL-LIFT printing and characterization of PZT
Printing large area pellets using beam shaper ns-DRL-LIFT printing and characterization of PZT Conclusions and Outlook
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Introduction Piezoelctric energy harvesters as alternative sources of energy PZT the most effeicient piezoelectric material Introduction fs-DRL-LIFT printing characterization of PZT
Screen printing is not suitable for printing micron sized features, on pre-mettalized and on flexible substrates
Printing large area pellets using beam shaper
Incident laser pulse
ns-DRL-LIFT printing and charaterization of PZT Conclusions and Outlook
Carrier DRL Donor
Receiver ISFOE11
Printing of PZT using fs-DRL-LIFT
Introduction fs-DRL-LIFT printing characterization of PZT Printing large area pellets using beam shaper ns-DRL-LIFT printing and charaterization of PZT Conclusions and Outlook
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• PZT film (150 nm) deposited using PLD on top of triazene polymer (TP) (200 nm) • Ti:sapph (800 nm, 150 fs) • Fluence ~ 360 mJ/cm2
Charaterization using PFM Introduction fs-DRL-LIFT printing characterization of PZT Printing large area pellets using beam shaper ns-DRL-LIFT printing and charaterization of PZT Conclusions and Outlook
• Baking at 1000C at ramp rate of 20/min for a dwell time of 1 hour • Voltages of + 100 and – 100 were applied for 20 s each
No signal recorded!!! Possible reasons for no mechanical response: • Small dimensional change to be detected • Absence of any internal net polarization
Thicker deposits and in-situ heating and poling
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Printing large area deposits using fs-DRL-LIFT Introduction fs-DRL-LIFT printing characterization of PZT
mm2 size deposits for in-situ heating and poling Refractive beam shaper (πshaper) for converting Gaussian to flat-top beam
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Receiver
Conclusions and Outlook
Ti:sapph (800 nm)
Donor
ns-DRL-LIFT printing and charaterization of PZT
Carrier
Printing large area pellets using beam shaper
Input beam profile
Width = 3.09 mm Introduction fs-DRL-LIFT printing characterization of PZT Printing large area pellets using beam shaper ns-DRL-LIFT printing and charaterization of PZT
Width = 5.25 mm
Output beam profile at 45 cm
Conclusions and Outlook
Width = 4.62 mm
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Width = 4.62 mm
Deposits printed uing pi-shaper • Ti donor film (~ 150 nm thick) • Ring patterns visible in the deposits
Introduction fs-DRL-LIFT printing characterization of PZT Printing large area pellets using beam shaper ns-DRL-LIFT printing and charaterization of PZT
20 µm
20 µm
Intensity profile of the output beam from pi-shaper at ~ 150 cm
Conclusions and Outlook
Width = 2.75 mm
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Width = 2.75 mm
Printing mm2 pads of PZT using ns-DRL-LIFT Introduction
Printing large area pellets using beam shaper
TP Donor
XeCl (308 nm, 30 ns) Carrier
fs-DRL-LIFT printing characterization of PZT
Lens (f = 250 mm)
Receiver
Aperture (4x4 mm)
ns-DRL-LIFT printing and charaterization of PZT Conclusions and Outlook
150 nm thick; 380 mJ/cm2 ISFOE11
1 μm thick; 1.5 J/cm2
Characterization employing in-situ heating and poling +
Introduction fs-DRL-LIFT printing characterization of PZT Printing large area pellets using beam shaper
Tufnol insulated posts
Magnified view of the PZT pellet on Au coated Si with In as upper electrode In PZT Si
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ns-DRL-LIFT printing and charaterization of PZT
Poling sample
M6 clearance holes
Al base plate
Conclusions and Outlook
Commercial piezometer (PM35)
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Longitudinal d33 piezoelectric coefficients ~ 20 pC/N were recorded for 1 μm thick pellets
Problems Difficult to place the metal foil on top of the deposits - not an optimum method Introduction fs-DRL-LIFT printing characterization of PZT
Pellets get damaged during measurements leading to short-circuiting Difficult to repeat the measurements
Printing large area pellets using beam shaper ns-DRL-LIFT printing and charaterization of PZT Conclusions and Outlook
Printing multilayers Metal (Al) pads underneath PZT films Metal fim serves dual purpose- acts as a DRL and upper electrode
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PZT Al pads on top of PZT
Conclusions and Outlook PZT pellets were printed using the fs/ns-DRL-LIFT techniques Introduction fs-DRL-LIFT printing characterization of PZT Printing large area pellets using beam shaper ns-DRL-LIFT printing and charaterization of PZT Conclusions and Outlook
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Post printing characterzation using PFM and in-situ heating and poling Longitudinal d33 piezoelectric ~ 20 pC/N were measured Printing of multilayers (PZT + metal) can be employed to avoid damage to the deposits during measurements
