New solar cells generating electricity underwater

      <h1>New Perovskite Solar Cells Revolutionize Underwater Energy Generation</h1>

In a thrilling episode of the classic Hanna Barbera cartoon, “Birdman,” the titular hero faces off against the nefarious Dr. Shark aboard a submarine, devoid of solar energy to power his abilities. However, Birdman’s struggles would be a thing of the past with the groundbreaking invention of perovskite solar cells by a team led by Simin Ma at Yunnan University, specifically designed for underwater operation.

Unlike traditional silicon solar cells, perovskite solar cells present a unique set of advantages and challenges. These cells are cost-effective, versatile, and boast higher solar energy conversion rates. The downside, however, lies in their susceptibility to rapid deterioration.

Optimized for Underwater Use

At first glance, using perovskite for underwater solar panels may seem counterintuitive due to their vulnerability to moisture. Nevertheless, these remarkable materials possess a secret weapon—the ability to adapt to various light wavelengths. While water typically obstructs the wavelengths absorbed by silicon cells, meticulously engineered perovskite cells can thrive in the depths of the ocean, benefitting from reduced light levels and cooler temperatures that enhance longevity.

Tweaking the chemical composition of perovskites during production facilitates the customization of their light absorption capabilities to suit different depths. The key challenge lied in enhancing the durability of the cells. The research team identified a highly effective additive, polyhexamethylene guanidine hydrochloride, which proved instrumental in fortifying the cells in various ways.

By encasing the material in a water-repellent layer and incorporating additives within the perovskite crystal lattice, the team successfully mitigated common degradation issues while simultaneously boosting solar cell efficiency.

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Source: arstechnica.com