An Method To Enhance Perovskite Photo voltaic Cells’ Stability

College of Washington, College of Colorado Boulder, Rice College, and the College of Oxford researchers have developed a technique to reinforce the steadiness of perovskite photo voltaic cells beneath excessive reverse bias.

Perovskite-based photo voltaic cells, identified for increased effectivity and decrease prices, are nearing industrial use. Nonetheless, their efficiency considerably drops beneath reverse bias situations, the place shaded cells in a photo voltaic panel degrade as a result of reverse voltage from illuminated cells.

A crew of researchers from the College of Washington, College of Colorado Boulder, Rice College, and the College of Oxford has launched a novel technique to reinforce the steadiness of perovskite-based photo voltaic cells when subjected to excessive reverse bias. Detailed of their current publication in Nature Vitality, their technique includes a definite machine construction that merges a polymer gap transport layer with an electrochemically secure again electrode.

Initially, the analysis crew tried to stabilize perovskite photo voltaic cells by a floor passivation approach, which didn’t yield the specified outcomes. The breakthrough got here when Jiang, the paper’s lead writer, proposed a brand new technique. 

The crew’s modern engineering technique helps management the electrochemical reactions that trigger early degradation of photo voltaic cells beneath reverse bias. This technique stabilizes the cells even when uncovered to comparatively excessive reverse bias.

The researchers developed new p-i-n photo voltaic cells utilizing their engineering method and evaluated their efficiency. They found that these cells remained secure beneath giant reverse voltages, much like the degrees that conventional silicon-based cells can endure.

The crew’s encouraging outcomes might encourage different researchers to discover their proposed design technique. This might result in developments in creating extra reliable perovskite photo voltaic cells that keep stability beneath reverse bias situations.

The current analysis carried out by this crew may assist sooner or later commercialization of perovskite-based photovoltaics and improve the event of different optoelectronic units. In the meantime, the crew intend to proceed their investigations into the mechanisms that result in the degradation of perovskite cells beneath situations of reverse bias and excessive reverse present.

Reference: Fangyuan Jiang et al, Improved reverse bias stability in p–i–n perovskite photo voltaic cells with optimized gap transport supplies and fewer reactive electrodes, Nature Vitality (2024). DOI: 10.1038/s41560-024-01600-z