One-step Deposition of Organic-Inorganic Halide Perovskite Membranes for Solar Cells
Perovskite solar cells are a promising next-generation photovoltaic technology due to their high power conversion efficiencies and low costs. Perovskite solar cells exhibit comparable efficiencies to traditional polycrystalline silicon solar cells at, potentially, one third the costs. As perovskite solar cells can be manufactured on flexible substrates and are semi-transparent they are a promising candidate for building-integrated photovoltaics. In order to manufacture perovskite solar cells suitable for building-integrated photovoltaics the thickness of the light absorbing layer must be reduced to improve transparency. Porosity in the perovskite layer is also desirable to produce a solar cell with a more neutral color. Current methods for producing thin, porous perovskite layers are difficult to efficiently scale up, use multiple steps, or are difficult to control.
This technology minimises the steps required for production of a porous perovskite layer for solar cell applications. The technology also allows for efficient scale-up and control of the porosity of the perovskite layer. This is achieved by utilising spin coating and microgels to provide a micropatterning template around which the perovskite crystallises. Microgels (which are like microscopic sponges) are already widely used to produce surface coatings in the automotive industry, and are compatible with solvents used to produce perovskite layers. The perovskite layer can be deposited in one step, with good control over porosity achieved by adjusting the ratio of microgel to perovskite. This technology can potentially be applied to multiple perovskite compounds, providing a scalable and controllable method for the production of a variety of semi-transparent solar cells.
- Scalable production method
- Offers control of pore size
- One step method of production
- Allows production of semi-transparent solar cells cells
- 31% higher power conversion efficiency than control perovskite solar cells without microgels
Integrated solar cells on:
- Interior and exterior walls
- Electric vehicles
- Personal electronics
- Traffic signage
Partnership for specific research and development and licensing.
Physical Chemistry Chemical Physics, 2018, DOI: 10.1039/C8CP05148H.
Using microgels to control the morphology and optoelectronic properties of hybrid organic-inorganic perovskite films.
Professor Brian Saunders, School of Materials, The University of Manchester, M13 9PL