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  • I have a very distinct memory of tv telling me, "every hour the sun beams enough solar

    我記得很清楚曾在電視上看過:「只要一個小時的陽光便足以

  • energy to power our planet for a year." Solar power, however, has yet to deliver on this

    供給地球一整年的電量。」但是,太陽能技術

  • promise from my children's television. Why is it so hard????

    到我們的下一代卻還未實現承諾。這真的如登天般困難嗎?

  • The sun shines on us every day, it comes down here we gather it up and we use it for energy

    陽光普照,我們收集陽光,轉換成電能

  • -- boom boom boom, done! But it's slightly more complicated than that, as you know.

    鏘鏘!任務完成!但事情恐怕沒那麼單純

  • In 1873, electrical engineer Willoughby Smith discovered the element selenium was photoconductive

    1873年,電機工程師Willoughby Smith發現硒元素具有光導電性

  • -- when exposed to sunlight the metallic form of selenium becomes a semiconductor! Three

    在陽光下,原為類金屬的硒元素會轉換成半導體

  • years later, other scientists discovered selenium could be used to create electricity from sunlight

    三年後,科學家發現硒元素可以將陽光轉換成電力

  • -- dubbed the photoelectric effect. When sunlight hits a metal like selenium the electromagnetic

    也就是所謂的光電效應。硒接收陽光後,

  • radiation is absorbed into it -- this fueled a whole HOST of physics nerds who are still

    可以吸收電磁輻射—這震驚了整個物理界,大部分人

  • arguing whether light is a particle or a wave to this day! It was such a big deal the 1921

    至今還停留在爭論光到底是粒子還是波。這個重大發現讓

  • Nobel Prize in physics was awarded to Albert Einstein for explaining the photoelectric

    愛因斯坦得到1921年的諾貝爾物理獎,因為他成功地解釋

  • effect, and for his contributions to theoretical physicsor whatever.

    光電效應,也對理論物理學做出重大貢獻

  • Eventually, scientists discovered that the light energy causes the freeing of electrons

    科學家最終發現,光可使電子獲得能量而成自由電子

  • which, if captured, could be used to generate electricity!. This photoelectric effect has

    一旦掌握自由電子,便能產生能量。

  • since been cultivated and researched and cultivated again, and the discovery that many different

    自此之後,科學家反覆研發光電效應,並發現許多

  • elements display a photoelectric effect opened it up for use in a number of inventions! Photosensitive

    元素皆適用光電效應,因而有了更多新發明

  • cells are used in televisions, industrial processes, telecommunications, fiber optics,

    例如感光電池可用於電視、工業生產、通訊、光纖

  • copy machines, spectroscopy and telescope, and to sense pollution or emphasize other

    影印機、光譜學、望遠鏡、偵測污染,甚至可以用在

  • lights like in night vision or infrared cameras; plus, of course, solar panels via a photovoltaic

    夜視鏡或紅外線攝影機,當然,太陽能板上的光伏電池也少不了它

  • cell. Photovoltaics were invented in the 1950s, and were popularized by the space program

    光伏電池大約發明於1950年代,後來因一項太空計劃而普及

  • as a way to power satellites. In the 1970s, pushes were made to modernize photovoltaics

    當時為了驅動人造衛星。到了1970年代,光伏電池進一步

  • for use in commercial and residential power -- but consumers mainly used them for calculators,

    應用在商業及民生上,但多數消費者用得到的只限於計算機

  • watches, radios and the like. Like a battery, a photovoltaic cell has a positive and negative

    手錶、收音機等等。就像一般電池一樣,光伏電池也有正負極

  • to guide the electrons into the system. Each cell uses a pair of silicon wafers -- one

    並形成通路讓電子流通;電池以矽晶圓製成

  • doped with phosphorous (negative) and one with boron (positive).

    摻雜磷和硼,分別為負極與正極

  • From 1995 to 2010 solar energy use grew 20 percent a year -- and now, new inventions

    1995至2010年來,太陽能使用量每年增長20%,有賴新科技

  • are making it even more affordable. Firstly, in 2009, China created way more solar panels

    現在太陽能成本更低了。首先,2009年時中國大量生產太陽能板

  • than the market needed, and the price collapsed. And secondly, state and federal governments

    造成市場供過於求,價格因此下跌;其次,各國政府

  • in the United States, Germany, the United Kingdom and Japan are all giving subsidies

    包括美國、德國、英國、日本等都提供補助

  • to cultivate better renewable energy systems. This means more supply and demand for this

    以期進一步發展再生能源。太陽能科技的需求及供給量雙雙上升

  • technology, and as money flows through renewables, they get better!

    一旦資金投入得越多,當然也就得以發展得更完善

  • Recently the University of Queen Mary in London revealed they can turn shrimp shells into

    近來,倫敦瑪麗皇后大學的研究員發現蝦殼

  • cheap solar panels. The shells of crustaceans contain chitin and chitosan which can be extracted

    可以用來製作廉價太陽能板。這是因為蝦殼含有甲殼素及殼聚醣

  • into CQD or carbon quantum dots -- CQD solar cells aren't new, but usually use expensive

    可提煉出碳量子點(CQD)。CQD太陽能電池其實早就有了

  • ruthenium for its photoelectric properties. Instead, the researchers found this biomass

    但之前是使用昂貴的釕達到光電效應的特性。現在,科學家發現

  • byproduct of the shrimp industry can be used to extract CQDs and create fully renewable,

    蝦子的副產品竟然也可以提煉CQD,這樣一來就真的做到

  • cheap solar cells!

    便宜的再生太陽能電池!

  • Pretty cool, huh? Fortunately solar cells aren't the only place finding greener solutions

    很酷吧!不過太陽能電池並不是唯一發展綠能的產業

  • for energy use -- Toyota is, too! The new Toyota Mirai is looking to the future with

    豐田汽車也朝同樣目標邁進,新推出的Mirai車款

  • sustainability in mind; fueled by hydrogen and leaving zero emissions behind.

    將以永續發展為目標,以氫燃料驅動,完全零排放

  • Every year renewable energy is getting better, but it's not yet as efficient as we'd hope.

    再生能源不斷進步,但效率似乎並不如預期

  • For more on the efficiency of the most common types of energy production, check out my video

    想知道更多有效的電力生產方式

  • about that here

    請點以下連結

  • What do YOU think is the most promising type of energy? Solar? Wind? Nuclear? Or plain

    你認為哪種再生能源最有看頭呢?太陽能?風力發電?核能?

  • old coal, oil and gas? Why? Tell me your thoughts in the comments, and thanks for watching.

    還是傳統的煤、石油、天然氣?請留言讓我知道你的想法,謝謝

  • If you haven't subscribed yet, go up there and subscribe. We need you here! Thanks again.

    若你還沒訂閱本頻道,快去訂閱吧,感謝大家收看

I have a very distinct memory of tv telling me, "every hour the sun beams enough solar

我記得很清楚曾在電視上看過:「只要一個小時的陽光便足以

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B1 中級 中文 美國腔 電池 太陽能 陽光 效應 再生 太陽能板

我們如何將太陽能轉化為電能 (How We Turn Solar Energy Into Electricity)

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    elearn 發佈於 2021 年 01 月 14 日
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