Chris O'Meara / AP

Researchers engineered a solar cell that worked for 10,000 hours without its performance being compromised, according to a new study.

Why it matters: The solar energy industry has been intensely focused on perovskite solar cells that cost less to produce compared to silicon-based ones. Perovskite cells could potentially disrupt the industry but have been hampered by the fact that they can rapidly degrade with wear and tear from water and UV light.

The next step: The efficiency of the new solar cell was low — only up to 12.7%. If the stability can be achieved with previously demonstrated efficiencies for perovskite cells (upwards of 22% and on par with silicon solar cells), the price of solar energy might even compete with fossil fuels.

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20 Republican former U.S. attorneys endorse Biden, call Trump "a threat to the rule of law"

Photo: Mandel Ngan/AFP via Getty Images

Twenty Republican former U.S. Attorneys on Tuesday endorsed Joe Biden while saying that "President Trump's leadership is a threat to rule of law" in the U.S., the Washington Post reports.

What they're saying: In the letter, the former prosecutors criticize Trump's use of the Department of Justice, saying the president expects the DOJ to "to serve his personal and political interests."

  • "He has politicized the Justice Department, dictating its priorities along political lines and breaking down the barrier that prior administrations had maintained between political and prosecutorial decision-making," the letter says.
Updated 34 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Politics: Axios-Ipsos poll: Federal response has only gotten worse — The swing states where the pandemic is raging.
  2. Health: The coronavirus is starting to crush some hospitals — 13 states set single-day case records last week.
  3. Business: Winter coronavirus threat spurs new surge of startup activity.
  4. Media: Pandemic causes cable and satellite TV providers to lose the most subscribers ever.
  5. States: Nearly two dozen Minnesota COVID cases traced to 3 Trump campaign events.
  6. World: Unrest in Italy as restrictions grow across Europe.

Ted Cruz defends GOP's expected return to prioritizing national debt

Sen. Ted Cruz (R-Texas) told "Axios on HBO" on Monday that he wishes reining in the national debt was a higher priority for President Trump.

Why it matters: Trump pledged during the 2016 campaign to reduce the national debt and eliminate it entirely within eight years, though he also deemed himself "the king of debt" and said there were some priorities that required spending. In the fiscal year that ended in September, the deficit reached a record $3.1 trillion.

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