Solar Hydrogen Project

Group Update

16th June 2009

Solar H2 project update: FZ

• Ashden Award meeting: poster not located yet/ have emailed Victoria

• UniSurrey/ WO3: some more information on preliminary results, issues on substrate dimension? (see following slide)

• Bioreactor upgrading/connections (Sartorius and Aflex Hose Ltd.)

• Design issues and progress and meetings with Paul

Hi Fessehaye;Please find attached some results I have secured on your requirements.They are preliminary, and I am sure some annealing would further enhance the WO3 content.Can you also let me know about your group and your line manager, so that I can speak to Ravi and arrange how to proceed, if you think the films I have grown are acceptable?Kind RegardsDamitha

Dear Damitha, I discussed the results with my colleagues and line manager and everyone was pleased to see the good progress. We are interested to proceed and we have a meeting tomorrow on the specifics and way forward. Please could you provide me some information on the experimental setup and procedure you used, i.e:-

•the precursor;•substrate type and dimension;•deposition method, temperature and time;•annealing temperature and time •and film thickness.

Thank youFessehaye

Hi Fessehaye; I used DC reactive sputtering for the film. It was on soda lime glass, we can accommodate up to 5 cm* 5 cm substrates, upto 2.5 mm thick. The growth rate is very slow, 1.5 nm/min.The substrate is held at room temperature. I have not performed post deposition anneal, since our Raman is with the wrong laser for probing WO3. The Pd layer you require on top is just a formality. Hope this helps. Damitha

Description: Polyvent 300 2.0M Flat ChannelProduct Details:Code: 30200Description: Polyvent 300 2M Flat ChannelBrand: BrandColour: WHITEMaterial: PVCDimensionsLength: 2Width: 0.308Height: 0.29

Polyvent 300 Flat Channel Connector Polyvent 300 Round To Rectangular

Polyvent 300 Elbow Bend / Plenum

http://www.polypipe.com/polypipe/controller?action=VENTS-ViewCategory&categoryID=7467

Various commercially available design systems

UniSurrey feasibilty study Results

C. Matei Ghimbeu et al, Thin Solid Films 515 (2007) 5498–5504

Room-temperature Raman spectra of (a) as-deposited WO3 film at 350 °C (1 ml/h for 1 h) and (b) annealed at 500 °C for 2 h in air.

Solar Hydrogen Project: PG

• Meeting with SD arranged to discuss methodology.

• Summary of process has been produced

Solar Hydrogen Project: CC

length 0.06 mwidth = 0.02 m

sheett (mm) area (m2) dV (mV) dV/4

0.006 1.20E-07 0.210 105.00 26.250.010 2.00E-07 0.126 63.00 15.750.013 2.50E-07 0.101 50.40 12.600.025 5.00E-07 0.050 25.20 6.300.050 1.00E-06 0.025 12.60 3.150.075 1.50E-06 0.017 8.40 2.100.100 2.00E-06 0.013 6.30 1.580.125 2.50E-06 0.010 5.04 1.260.150 3.00E-06 0.008 4.20 1.050.250 5.00E-06 0.005 2.52 0.630.400 8.00E-06 0.003 1.58 0.390.500 1.00E-05 0.003 1.26 0.321.000 2.00E-05 0.001 0.63 0.16

Solar Hydrogen Project: SD

• Solar Simulator: one more thing after another!

• Doctor Blade machine: received and checked. Start on Wednesday

• Electrchem09: draft abstract circulated

Solar Hydrogen Project: SD

• Muffle Furnace:

– BCF 11/8: ~£1160– Chamber dims.: 180x190x235 mm– Outer dims: 500h x 530w x 450d

mm

will fit fume cupboard

Solar Hydrogen Project: SD

• Photoelectrolysis meeting: Harrison (Thomas Young Centre) and Alford (Materials)– Discussed the potential for collaboration between

the Solar Hydrogen and Nanostructured Materials programmes

– NA: has capability for the deposition of well-characterised materials:

• May be able to deposit WO3 and Fe2O3

– NH: modelling semiconductor properties from “first” principles; predicting materials for study

Solar Hydrogen Project: SD

0.0E+00

5.0E-07

1.0E-06

1.5E-06

2.0E-06

2.5E-06

3.0E-06

3.5E-06

4.0E-06

4.5E-06

5.0E-06

300 350 400 450 500 550 600 650 700

Wavelength / nm

Ph

oto

curr

en

t D

ensi

ty /

Acm

-2

0.00E+00

5.00E-07

1.00E-06

1.50E-06

2.00E-06

2.50E-06

3.00E-06

3.50E-06

No

rmalised

Ph

oto

curren

t

Photocurrent Density Normalised Photocurrent

Ir Deposition

O2 H2

Solar Hydrogen Project: PB

Reactor Design &

CC-124 Growth Data

Bojan Tamburic

Reactor design history

Vertical flat-plate 1l reactor

Culture reactors

Sartorius reactor – OD and pH

Sartorius reactor – growth rates