Described in a research paper published last week in the Royal Society of Chemistrys Journal of Materials Chemistry A, researchers at Brown have come up with a technique to deposit sunlight-absorbing perovskite crystals onto a substrate using a room-temperature solvent bath as an alternative to high-heat thermal annealing.
According to the paper, cells based on the so-called solvent-solvent extraction (SSE) process reach a sunlight conversion efficiency of up to 15.2% and an average efficiency of over 10% for semi-transparent cells with a thickness of less than 100-nanometers.
The SSE method has generic appeal, and its key attributes room-temperature process, rapid crystallization, large-area uniform deposition, film-thickness control, ultra-smoothness, and compositional versatility make the SSE method potentially suitable for roll-to-roll scalable processing of hybrid-perovskite thin films for future multifunctional [perovskite solar cells], says the paper.
The research builds on recent years of exciting laboratory progress on solar cells derived from perovskite absorber materials, during which efficiencies have skyrocketed to greater than 20% from less than 5% in only five years.
Commercially, however, the technology still has a long way to go. Earlier this month, start-up company Oxford PV closed an £8 million (US$12.15 million) round of investment in its bid launch commercial products based on perovskite technology.
This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact: email@example.com.