Solar power is helping bring about a future of cleaner energy, but there are limits to

Solar power is helping bring about a future of cleaner energy, but there are limits to where rigid solar panels (刚性太阳能电池板)can go. A new kind of solar cell made with a mineral called perovskite (钙钛矿)can go almost anywhere, says physicist Olga Malinkiewicz. We can use perovskite cells on the surfaces of the building, on the roofs of the buildings, on the roofs of the cars and on the electronic devices. We can use it on the sails. We can use it in the balls, tents and unlimited applications. Malinkiewicz says perovskite has become a favorite among solar panel researchers. Because it can be printed, everyone can use it on every surface.
Malinkiewicz developed a way to print perovskite panels like an inkjet printer. She co-founded a company to produce them, called Soleil Technologies, after the Baltic sun goddess. Construction company Skanska is testing the panels at their Warsaw headquarters. Adam Targowski is sustainable (可持续的)development manager for Skanska. They work perfectly, even when they are not well exposed to sunlight. So we can use them in all surfaces of the building. Soleil calculates that about one square meter of panel can supply a day’s worth of power for one worker’s computer and lights. And they keep getting better as research continues, says the company’s scientific director Konrad Wojciechowski.
For other technologies, it took decades to really enter markets. Perovskite has been around only for few years in scientific research, so there is still a lot to be done, but potential is basically pretty much unlimited, I think. There are still durability and other problems to work out, but several companies expect to have perovskite panels on the market this year.
24. What do we know about perovskite solar cell from the first paragraph?

A．It’s delicate.

B．It’s complex.

C．It’s flexible.

D．It’s expensive.

25. What does the underlined word “they” in the second paragraph refer to?

A．Skanska and Adam Targowski.

B．Malinkiewicz and Skanska.

C．Soleil Technologies.

D．Perovskite panels.

26. What can we infer from the last paragraph?

A．It needs years to put perovskite panels into markets.

B．Scientists think perovskite panels are ready for markets.