It is also needed to make a light-sensitive substance in the eyes.
VOA: special.2009.04.21
The near-infrared photoactive polymer absorbs more near-infrared light but is less sensitiveto visible light, balancing solar cell performance and transparency in the visible wavelength region.
The material is an organic photovoltaic semiconductor (called rr-P3HT) which, unlike the metal or silicon-based materials used until now for such biotechnological interfaces, is soft, light, flexible and highly biocompatible and naturally sensitiveto visible light.