Research Project: Perovskite/ kesterite-based tandem photoelectrodes for photostimulation of neurons
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Contributors
Funders
ID
TB.00616
Authors
Vhanalkar, Sharadrao
Faculty Member
Publications
Perovskite quantum dot-based photovoltaic biointerface for photostimulation of neurons
(IEEE Computer Society, 2024) Eren, Güncem Özgün; Hasanreisoğlu, Murat; Hassnain, Muhammad; Kaleli, Humeyra Nur; Kaya, Lokman; Khan, Saad Ullah; Nizamoğlu, Sedat; Önal, Asım; Pehlivan, Çiğdem; Şahin, Afsun; Vhanalkar, Sharadrao; Qureshi M.H., Srivastava S.B., Kaya L.,; Department of Electrical and Electronics Engineering; Department of Psychology; Graduate School of Health Sciences; Graduate School of Sciences and Engineering; School of Medicine; Yes; College of Engineering; College of Social Sciences and Humanities; GRADUATE SCHOOL OF HEALTH SCIENCES; GRADUATE SCHOOL OF SCIENCES AND ENGINEERING; SCHOOL OF MEDICINE
Objective: A promising avenue for vision restoration against retinal degeneration is the use of semiconductor-based photovoltaic biointerfaces to substitute natural photoreceptors. Instead of silicon, perovskite has emerged as an exciting material for solar energy harvesting, and its nanocrystalline forms generally offer better stability than their bulk counterparts in addition to the distinct synthesis and fabrication steps. Methods: Herein, we synthesize tetramethylammonium lead iodide (TMAPbI3) perovskite quantum dots (QDs) as a novel photoactive material for photovoltaic biointerfaces. While the TMAPbI3 quantum dots and electrolyte interface induces Faradaic photocurrent under light illumination, the heterojunction with P3HT converts the charge-transfer process to a safe capacitive photocurrent with an improved ionic responsivity of 17.4 mA/W. Significance: The integration of the 18-nm quantum dot thickness shows good biocompatibility with primary cultures of hippocampal neurons and the photoresponse of the biointerface triggered photostimulation of the neurons. The rise of perovskite materials can stimulate novel forms of photovoltaic retina implants. © 1964-2012 IEEE.
Photo-electrochemical performance of Cu2ZnSnS4 thin films prepared via successive ionic layer adsorption and reaction method
(Elsevier, 2022) Vhanalkar, Sharadrao; Patil, B. M.; Patil, V. L.; Bhosale, S. R.; Kamble, P. D.; Patil, P. S.; Department of Electrical and Electronics Engineering; Yes; College of Engineering
In this report, we have prepared the Cu2ZnSnS4 (CZTS) thin films by a simple and cost effective successive ionic layer adsorption and reaction (SILAR) technique. The layer by layer deposition of CZTS thin films were carried out by SILAR method. The number of SILAR cycles and the sequence of the binary chalcogenides was optimized to get better photo-electrochemical (PEC) performance of CZTS thin films. Meanwhile, the different physicochemical characterization tools such as XRD, Raman were used to identify the phase and purity of the synthesized samples. The XRD and Raman studies confirmed the phase purity of the CZTS thin film deposited with Cu2S as underneath and ZnS as topmost or bottom layer. The surface morphological study reveals the uniform, compact microstructure of as prepared CZTS thin films. Meanwhile, the chemical composition and microstructures of material plays vital role in photovoltaic performance, including photo-electrochemical (PEC) conversion. In our report, we found uniform CZTS microstructure without any secondary phases; which utilize the visible light illumination to generate the electrical signals via chemical reactions with European nitrate as a redox mediator.
