• 5 minutes Trump will capitulate on the trade war
  • 7 minutes China 2019 - Orwell was 35 years out
  • 12 minutes Glory to Hong Kong
  • 15 minutes ABC of Brexit, economy wise, where to find sites, links to articles ?
  • 2 hours Is Eating Meat Worse Than Burning Oil?
  • 55 mins Diplomatic immunity
  • 5 hours Canada Election Deadlock?
  • 6 hours China & Coal: China's 2019 coal imports set to rise more than 10%: analysts
  • 17 hours Clampdown on Chinese capital flight is shutting down their commercial construction in US
  • 1 day Here's your favourite girl, Tom!
  • 1 day Peaceful demonstration in Hong Kong again thwarted by brutality of police
  • 5 hours Wonders of US Shale: US Shale Benefits: The U.S. leads global petroleum and natural gas production with record growth in 2018
  • 4 hours Devaluing the Yuan
  • 1 day IMO 2020:
  • 16 hours Nigeria Demands $62B from Oil Majors
  • 1 day Deepwater GOM Project Claims Industry First
  • 14 hours Fareed Zakaria: Canary in the Coal Mine (U.S. Dollar Hegemony)
Oil And Islam: Libya’s Civil War Rages On

Oil And Islam: Libya’s Civil War Rages On

Khalifa Haftar’s offensive on Tripoli,…

US Navy Develops Underwater Solar Cells

Underwater autonomous systems which provide situational awareness and long-term environment monitoring are becoming increasingly more popular. In order to power these systems cables must be laid to supply power created onshore, expensive batteries must be used and constantly changed to ensure a steady power supply, or solar panels must be constructed on an above-water platform.

Photovoltaic cells have been previously tested for underwater use, but due to the lack of sunlight penetrating the water they only had limited success.

Now, a team of scientists from the US Naval Research Laboratory Electronics Science and Technology Division have developed a solar cell specifically designed for use underwater, which can efficiently absorb solar radiation underwater up to a depth of nine metres.

Philip Jenkins, one of the scientists on the team, explained that, “although water absorbs sunlight, the technical challenge is to develop a solar cell that can efficiently convert these underwater photons to electricity.”

Due to the lack of penetration the intensity of solar radiation underwater is lower than on the surface, however the sunlight that does penetrate comes in narrower wavelength concentrations, leading to high conversion efficiency when the solar cells are adjusted to match the wavelength range.

Normal PV cells are constructed from crystalline silicon, however previous tests have shown that this material was inefficient; instead the team have are using gallium indium phosphide to create their underwater PV cells. Gallium indium phosphide works best for wavelengths between 400 and 700 nanometres, the typical range of light found underwater.

By. Joao Peixe of Oilprice.com



Join the discussion | Back to homepage

Leave a comment

Leave a comment

Oilprice - The No. 1 Source for Oil & Energy News
Download on the App Store Get it on Google Play