Managing residual ions in photovoltaic spatial light modulators

T. Ducatel; Y. Zhong; Y. Lin; S. Fall; T. Heiser

doi:10.1117/12.3022197

18 June 2024 Managing residual ions in photovoltaic spatial light modulators

T. Ducatel, Y. Zhong, Y. Lin, S. Fall, T. Heiser

Proceedings Volume 13016, Liquid Crystals Optics and Photonic Devices; 130160P (2024) https://doi.org/10.1117/12.3022197
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Conference Poster

Abstract

Photovoltaic spatial light modulators (PSLMs) form a new type of optically addressed liquid crystal (LC) devices, capable of adapting its optical properties to incident light in less than a second, without external power supply. Since the photo-induced voltage generated by a PSLM is continuous, the presence of residual ions in the LC may interfere with the device operation and compromise the performances. Here, we investigate the influence of the alignment layers (AL) in a PSLM on ion accumulation/neutralization at the LC/AL interfaces by probing the optical and dielectric response under DC bias of LC light valves based on Poly(3-hexylthiophene-2,5-diyl) (P3HT) and/or poly(vinyl-alcohol) (PVA) as ALs. We find that charge injection into the P3HT layer allows neutralization of ions accumulated at LC/ALs interfaces thereby avoiding the screening of the electric field in the LC.

Citation Download Citation

T. Ducatel, Y. Zhong, Y. Lin, S. Fall, and T. Heiser "Managing residual ions in photovoltaic spatial light modulators", Proc. SPIE 13016, Liquid Crystals Optics and Photonic Devices, 130160P (18 June 2024); https://doi.org/10.1117/12.3022197

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