Event date:
Sep 15 2021 6:00 pm

Enhanced Stability and Efficiency of Emerging Photovoltaic Devices using Discotic Liquid Crystals

Dr. Ammar Ahmed Khan
Qurat Ul Ain
Zoom Meetings (Online)
PhD Research Seminar
Discotic liquid crystals (DLCs), a class of aromatic compounds, have a core structure containing benzene rings attached with mobile alkyl chains. While the core enhances the conductivity of DLCs, the mobile alkyl chains make it a semi-insulating material with induced hydrophobicity. Dye-sensitized solar cells are hybrid device structures that suffer instability due to the volatile nature of the electrolyte used in them. For this purpose, we have prepared a physical gel of DLCs that induces the low parasitic effect due to their fibrous structure and hydrophobic nature. In this work, DLCs and co-sensitized dyes have been used to fabricate high-efficiency devices (best up to 7.6%) that show promising optoelectronic characteristics with less recombination rate. Moreover, we shall be studying the mixed dimensional perovskites-based absorbers' interaction with the liquid crystalline hole transporter materials for the further enhanced efficiency and stability of the emerging devices.

 Ain, Q. U., Iqbal, S., Ali, S. A., Saleem, M., Rehman, H. U., ulHaq, A., & Khan, A. A. (2021). Engineering fibre morphology in self-assembled physical gels of a prototypical discotic liquid crystal. Liquid Crystals, 48(6), 888-901.