Solar cell structures: Reviewing and classifying the various design possibilities Wrap-up from “cell structures” discussion Progress meeting 12 April 2013.

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Presentation transcript:

Solar cell structures: Reviewing and classifying the various design possibilities Wrap-up from “cell structures” discussion Progress meeting 12 April 2013

2 Main questions behind each design confidential 1. Emitter: front side or rear side? 2. Emitter: continuous or discontinuous? 3. Nanopattern: sunny side or shadow side? 4. Contacts: Two-side or one-side?

3 Three main criteria for classification confidential Optically efficient Experimentally feasible (4 materials) Electrically efficient

4 Design A Epifree and PECVD today confidential OpticallyElectrically In EpifreeIn Poly-Si In PECVD- Si In Epifoils c-Si base Emitter Substrate Back-surface field Contact c-Si base Emitter Substrate Back-surface field Contact

5 Design A+ Discontinuous emitter confidential OpticallyElectrically In EpifreeIn Poly-Si In PECVD- Si In Epifoils c-Si base Emitter Substrate Back-surface field Contact c-Si base Emitter Substrate Back-surface field Contact

6 Design B. Substrate rear emitter confidential OpticallyElectrically In EpifreeIn Poly-Si In PECVD- Si In Epifoils c-Si base Passivation Substrate Emitter Contact

7 Design C. Superstrate one-side contacts confidential OpticallyElectrically In EpifreeIn Poly-Si In PECVD- Si In Epifoils c-Si base Emitter Back-surface field

8 Design D. Superstrate two-side contacts confidential OpticallyElectrically In EpifreeIn Poly-Si In PECVD- Si In Epifoils c-Si base Emitter Substrate Back-surface field Transparent Contact

9 Design E. Superstrate NP to Sun confidential OpticallyElectrically In EpifreeIn Poly-Si In PECVD- Si In Epifoils c-Si base Passivation Emitter c-Si base Passivation Emitter Transparent contact

nanophotonics for ultra-thin crystalline silicon photovoltaics project