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Hybrid Perovskite Bulk Photovoltaic Effect Devices and Methods of Making the Same

National Renewable Energy Laboratory

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Technology Marketing Summary

Perovskite halides (e.g. CH3NH3PbI3 or MAPbI3) are a new class of light absorbers with exceptional and unparalleled progress in solar cell performance. A perovskite is any material with a specific ABX3 crystal structure, wherein an organic based cation is A, a metal cation is B, and a divalent halide anion is X. Work on solar cells using these perovskite materials has advanced rapidly as a result of the material’s excellent light absorption, charge-carrier mobilities, and lifetimes that result in high device efficiency with low-cost, industry-scalable technology. However, this potential for low cost and scalability requires overcoming barriers hindering the commercialization of perovskite devices related to perovskite stability, efficiency, and environmental compatibility. NREL researchers have made significant technical contributions within six areas critical to developing commercialized perovskite devices, which include increases in film efficiency and stability and innovations in perovskite film deposition methods, film chemistry, hole and electron extraction layer engineering, and device architecture.

Description

Researchers at NREL have created a new perovskite device which operates via the bulk photovoltaic effect. By applying an electric field to a perovskite later, researchers were able to reorient the polarization within the perovskite layer to increase the size of the ferroelectric domains and the magnitude of the electrical, optical, and mechanical response of the perovskite layer. The open circuit voltage of ferroelectric photovoltaics is not limited by the material’s band gap, therefore electron hole pairs can be separated more efficiently. This invention could enable radically new perovskite architectures with higher efficiency and more favorable material properties.

This technology is within the Film Efficiency and Film Deposition groups of NREL’s perovskite portfolio. For further information regarding NREL's broader perovskite portfolio, please visit NREL's Perovskite Patent Portfolio website.

The Film Efficiency category consists of film deposition methods, chemistry improvements, and engineering of device layer and architecture to push commercial perovskite device efficiencies to 20% and beyond.

The Film Deposition category consists of novel methods for more rapid, less expensive, and more effective means of depositing perovskite films. These techniques have been published in multiple peer-reviewed journals and are prepared for scaling to commercial levels.

Benefits
  • Increased open circuit voltage
  • Enables new device architectures
Applications and Industries
  • Perovskites
  • Photovoltaics
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
NREL ROI 16-133PrototypeAvailable04/27/201803/28/2018

Contact NREL About This Technology

To: Bill Hadley<bill.hadley@nrel.gov>