Electro-Coating Method for Uniform Layer Thickness of Perovskite Material on Carbon Wire-Shaped Substrates

This novel method allows the individual to predictably and repeatably coat semi-conductive wire shaped materials (such as carbon nano-tube yarn (CNY)) with perovskite solution (CH3NH3Pb13). Perovskite is a rising star in the photo-voltaic community. With the research community rushing to bring 2D planar perovskite solar cells to market, coating/manufacturing methods for 3D structures have been left behind. Controllable and uniform heating of the substrate is necessary for a high-quality perovskite layer. Due to the complex 3D geometry of wires, the repeatable control and uniform heating of CNYs has not been possible until this method was created. Here we use Joule Heating to accurately and stably control the temperature of the wire in order achieve a uniform perovskite layer. Not only does this method add control and repeatability to the process, but it is also more energy efficient than any other published method. This makes this process ideal for scalable research applications and eventually industrial fabrication of wire-shaped perovskite LEDs, photo-detectors, and solar cells.

Advantages:

- Uses less energy than other methods, making it a strong candidate for scalable manufacturing as perovskite solar cells continue to rise in efficiency and performance.

- Provides instant heating and cooling to the substrate using Joule heating.

- Allows for the instantaneous control over heating of the substrate by merely adjusting the power source.