Coordination of work at M24

Valerie Depauw, monthly conference call October 13, 2014

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On the menu today

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Feedback on EUPVSEC 2014

Overview of deliverables

Organization of meeting in Lund

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But first Bye Bye Webex? Not yet

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Webex license will not be renewed by imecNext conf call October 13 via M$Office Lync I will plan some tests times beforehand

not working well... using webex as long as possible – till now still operational

Sorry Jerome...

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EUPVSEC 2014Valerie and Christos were there

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About the talk we gave on PNV (Only 12 min, sorry but I had to drop content ) Positive feedback But no big discussion

Our general impression Nanophotonics is still there but interest is not taking off

Many contributions, 1 dedicated parallel event... But no industry around Issue: random pyramids are already doing a great jobNeed to combine light trapping with another function

Thin-film c-Si not at its highest (rumor: Solexel to stop epi) But poly-Si is still there (record Voc > 650 mV at HZB) Other thin film competitions at high eff. (e.g. CIGS, perovskites)

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EUPVSEC 2014Light-trapping in competition

About modeling? Plasmonics for PV keep declining, e.g. Schuster poster (Univ. York) Nanopyramids rock: @SERIS people agree with us Going above Lambertian is only interesting for very thin films (Catchpole, ANU) Good modeling of light trapping and randomness at Karlsruhe IT (C. Rockstuhl)

About samples? Large variety of approaches, many groups working on it. Mainly optical

demonstrators and passivating possibilities (e.g 2AV.2.34).

About solar cells? (next to us) @HZB black silicon Problems to integrate, worst results than reference @TUDelft same as above @ISE/nines-PV 0.1% higher efficiency than reference

2DV.4.9

1AO.2.1

Parallel

1CO.9.4

1CO.10.2

2AV.3.5

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Light-trapping in competitionWhat about the future?

About solar cells, keep an eye on: @ Fraunhofer ISE! Solar cells to come?

Back grating inside a-Si:H layer (avoid passivation issue)TiO2 nanoparticles to be integrated into tunnel-oxide high-efficiency cell

@AMOLF/ECN: Mie resonators at front sideBut they benchmark to flat cells...

And us... we have potential!

1CO.10.4 / 2DO.2.3

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Progress meeting

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Many deliverables are due yesterday

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# WP Delivery In chargeD 3.2 Report: First batch of solar cells, non-

optimised opticallyReport on first batch of four solar cell technologies with one side patterned up to 30 x 30 mm2 (optically non-optimised) with LHL, NIL and HCL (to be used as input for go/no-go in MS 6)

3 18- Apr 14 1 Imec

D 1.7 Report: Modelled current enhancement prospects

Report on current enhancement prospects, including double-side patterning and tolerances to process non-idealities

1 20- June 14 3 FUNDP

D 2.4 Report: Experimental periodic patterned films

Report on the characteristics of optically optimized periodic structures, on areas up to 50 x 50 mm2, including inputs for WP3, following D 1.4

2 21- July 14 4 OBDU

D 2.5 Report: Experimental non-periodic patterned films

Report on the characteristics of optically optimized pseudo-periodic/random structures, on areas up to 50 x 50 mm2, including inputs for WP3, following D 1.5

2 24- Oct 14 5 Chalmers

D 4.2 Report: Cost of patterning Report on cost of adding a patterning step to solar cell fabrication

4 24- Oct 14 6- Total

D 3.4 Report: Second batch of cells, with non-periodic optimal patterns

Report on second batch of patterned cells integrating optically optimised non-periodic patterns, following D 2.5

3 27- Jan 15 7- LPICM

Now

After Lund meeting

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new

Progress meeting in Lund

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Global agenda Same course as for the previous times One novelty: conclusion slide/WP for each partner

Seminar topics? Proposals?

Round tables TBD during WPs Proposal: 1 or 2 “large table” sessions

+ time for small “face to face”

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Progress meeting M24Agenda, in short

Day 1 Overview of WPs and a seminar (9h-17h15)

Morning Welcome WP1 and WP2 (2x 1h)

Afternoon WP3 (1h) Seminar WP4 (45 min)

EveningDinner at 18h30 in Lund centre

Day 2 Round tables and steering committee (9h-14h30)

Morning Round tables, 2 sessions + 1 free Closing remarks

Afternoon Steering committee

Max. end time max.15h

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Your preparation

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Follow the WP leaders requests Make slides on your results + a personal conclusion slide, for each WP you are involved in If you need: bring up table-topic

For members of steering committee: Put on the agenda topics you want to discuss (email of Valerie will follow shortly for this)

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Any questions?

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Practical questions to Kidong?

Other?

nanophotonics for ultra-thin crystalline silicon photovoltaics

This project has received funding from the European Union’s Seventh Programme for research, technological development and demonstration under grant agreement No 309127

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Day 1: Thursday 23/10From 9h Hello! Meeting up

9h30 Welcome• Agenda • Global status

30 min KidongValerie

10h WP1• Overview + separate conclusion slide

of partners • Discussion

30+30 min Jerome

11h Break 30 min

11h30 WP2 (=WP1) 30+30 min Christian

12h30 --- Lunch --- 1h30

14h WP3 (=WP1) 30+30 min Pere

15h Break 15 min

15h15 Seminar on... (tbd) 45 min ?

16h Break 15 min

16h15 WP4 (=WP1) 45 min Patricia

17h Decision on topics for next day 15 min Valerie

17h15 Free time till dinner (time? tbd)

Time in bold = sharp!

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Day 2: Friday 24/10

9h Round tables 1 + summary 40+20 min

10h30 Break 30 min

11h Round tables 2 + summary 40+20 min

12h Closing remarks 15 min Valerie

12h15 --- Lunch --- 30+30 min

13h30 Steering committee 15 min Steering committee members

14h30 End, good bye!

15h (Max. time)

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Focus for each WP

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WP1 - Evaluate the records Jsc that can be obtained with nanopatterns + identify optima for HCL

How high? What is needed to go high? Decide what structure to focus on for cost

Find out what works best with HCL

WP2 - Get best patterns possible with wet etching Periodic: new NIL stamps Non-periodic: improve fill factor ... on all materials to be used for cells still need...

epifoils front-side tests and PECVD wet etching improvement

WP3 - Prepare for making higher efficiency cells in October Think what process changes will be needed

WP4 - Prepare data for model