Organic Photovoltaic Pseudocapacitors for Neurostimulation
Mertcan Han, Shashi Bhushan Srivastava, Erdost Yıldız, Rustamzhon Melikov, Saliha Sürme, Itır Bakış Doğru, İbrahim Halil Kavaklı, Afsun Şahin, Sedat Nizamoğlu
Abstract
, generating high photovoltages over 400 mV for the main eye photoreception colors of blue, green, and red. Moreover, modification of PEDOT:PSS controls the charging/discharging phases leading to rapid capacitive photoresponse of 50 μs and effective membrane depolarization at the single-cell level. The neural interface has a device lifetime of over 1.5 years in the aqueous environment and showed stability without significant performance decrease after sterilization steps. Our results demonstrate that adopting the pseudocapacitance phenomenon on organic photovoltaics paves an ultraefficient, safe, and robust way toward communicating with biological systems.