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Optically addressed light modulators using an organic photovoltaic layer

Abstract : The performances of liquid crystals (LCs) based optically addressed Spatial Light Modulators (OASLMs) strongly depends on the photosensitive layer properties. To accommodate device transparency, lateral resolution and low cost production, organic semiconductors appear as the ideal candidates. We chose to use a P3HT: PCBM blend as the photosensitive layer. Our results showed that the liquid crystals reorient according to the luminous intensity alone and without external power supply. Additional measurements indicate that the photovoltaic effect is at the origin of this phenomenon. This type of device allowed spatial modulation of the LCs orientation and demonstrates its potential in holographic applications. A second type of device integrating interfacial layers of PEIE and PEDOT: PSS allowed us to control the orientation of the LCs and gives promising routes towards the design of self-sustainable OASLMs.
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Submitted on : Thursday, August 20, 2020 - 9:50:29 AM
Last modification on : Sunday, October 30, 2022 - 3:50:32 AM
Long-term archiving on: : Tuesday, December 1, 2020 - 8:23:41 PM


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  • HAL Id : tel-02917964, version 1


Thomas Regrettier. Optically addressed light modulators using an organic photovoltaic layer. Micro and nanotechnologies/Microelectronics. Université de Strasbourg, 2017. English. ⟨NNT : 2017STRAD038⟩. ⟨tel-02917964⟩



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