Specific Solar Cells & LiFi Applications

Specific Solar Cells & LiFi Applications

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Emilie BIALIC, Advanced R&D Division

AGENDA SunPartner Technologies Company presentation Aesthetic solar technology Semi-transparent technology

LiFi Technology Context LiFi & Ambient Lighting effects Wysips Connect Crystal performances

First semi-transparent LiFi receiver CONFIDENTIAL

SUNPARTNER TECHNOLOGIES PRESENTATION

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Rousset, France

Founded in 2008 59 employees Develop new photovoltaic (PV) energy harvester solutions Strong IP (150 patents) Wide range of expertise

 Headquarter  400 m² Clean room  2 Pilot-line equipments

totally funded

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AESTHETIC SOLAR TECHNOLOGY

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Power reserve always available in a solar bag

Focus on Bookeen E-reader solar cover, presented at MWC 2016: 1H of exposition about 25Klux  1 extra day of e-reader use

Extended autonomy up to 70% for a bluetooth speaker CONFIDENTIAL

SEMI-TRANSPARENT TECHNOLOGY

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Wysips® Crystal and Reflect Highly transparent photovoltaic glass module for display applications

Wysips® Glass Highly transparent photovoltaic glass module for use in buildings or transportation

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WYSIPS TECHNOLOGIES FOR CONSUMER APPLICATIONS

Wysips Crystal

WYSIPS TECHNOLOGIES FOR GLASS APPLICATIONS

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Wysips Vision-Glass

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LIFI TECHNOLOGY

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1. 2. 3. 4. 5.

Information encoding Specific LEDs polarisation Modulated light propagation Photo-reception Information decoding

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A lot of studies about:

LiFi

 LED performances  Modulation shemes  Chanel modeling

LEDs: Lighting & Communication  Low-power consumption  High bandwith

But only few about:  Receiver performances

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 Receiver integration …

LIFI & AMBIENT LIGHTING EFFECTS

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DCO-OFDM signal 31 subcarriers from DC to 1.2 MHz, 2.4 MHz or 5.5 MHz Each subcarrier is QPSK-modulated Each frame consists in 100 OFDM symbols

Standart Led Lamp Nova Polaris from Novaday Clipping level at 80% of max. value

Arbitrary Function Generator Tektronix AFG 3102

Bias Tee Picosecond 5575A

Photovoltaic modules Directly connected to the oscilloscope

Digital oscilloscope Tektronix DPO TDS7054

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EFFECTS:

Indoor Ambient Lighting Conditions Conventional Attenuation

Outdoor Ambient Lighting Conditions Drastic Attenuation

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EFFECTS:

Indoor Ambient Lighting Conditions > 11 Mbit/s SNR > 5dB Spectral Efficiency = 2 bit/s/Hz Outdoor Ambient Lighting Conditions 0 Mbit/s

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EFFECTS DULE

Indoor Ambient Lighting Conditions Conventional Attenuation Outdoor Ambient Lighting Conditions Conventional Attenuation

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EFFECTS DULE

SNR > 5dB Spectral Efficiency = 2 bit/s/Hz

Indoor Ambient Lighting Conditions 11 Mbit/s

Outdoor Ambient Lighting Conditions > 3 Mbit/s

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WYSIPS CONNECT CRYSTAL AN INTERESTING LIFI RECEIVER ?

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From myth … OmniDirectionnal

Thin & Integrable

Energy Sufficient

Ambiant Lighting Resistant

High Data Rate

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Universal Receiver

… to reality Self Adaptive

FIRST SPECIFIC DESIGNS & RESULTS

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5dB

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OPTIMIZED LIFI MODULES TO HIGH LIGHTINGS

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EFFECTS ODULE

Conventional channel attenuation

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EFFECTS ODULE

> 10 Mbit/s > 5 Mbit/s

SNR > 5dB Spectral Efficiency = 2 bit/s/Hz

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STREMING VIDEO DEMONSTRATOR

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LET’S GO TO

THE VIDEO DEMONSTRATION

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CONCLUSION

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Specific Photovoltaic LiFi Designs are realized 3 different ambient lighting responses are revealed Conventional LiFi effects : If the ambient lighting Saturation stability effects : If the ambient lighting Unexpected LiFi effects : If the ambient lighting

Then the SNR Then the SNR Then the SNR

First semi-transparent LiFi receiver system are made Plug and play solution Streaming video with a data rate of 5Mbit/s CONFIDENTIAL

Thanks for your attention

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ANNEXES

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ANNEXE 1 : LIFI DEMONSTRATOR

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Transmitter Led Lamp + Modem

Bidirectionnal system Down link: Visible Light Up link: Infra-Red Data rate: 5 Mbit/s

Receiver Crystal Module + Modem

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