Today, the world is grappling with more than just the climate crisis, and yet even now, in the face of a global pandemic, scientists are marching on with renewable solutions.
Just this month, no less than three records have been broken in solar panel efficiency. The first and the second were achieved by scientists in the United States at the National Renewable Energy Laboratory (NREL).
Their unique "six-junction" solar cell has unprecedented1 energy conversion2 , turning intensified3 light into electricity at 47.1 percent efficiency - the most efficient in the world under concentrated light conditions. This record beat the previous contender established just a couple of years ago by one percent.
"This device really demonstrates the extraordinary potential of multijunction solar cells," says John Geisz who works at NREL.
The achievement was helped by concentrating sunlight until it was a sizzling 143 times more intense. But even under the illumination of a single Sun, the solar cell is better than any other.
This is the second record broken - the team tested another version of their six-junction cell without concentrating the light, and achieved an unprecedented 39.2 percent efficiency.
Essentially4 this means that even more of the Sun's energy can now be converted into electricity.
The third record broken this month, for instance, was achieved by something called a tandem5 cell. This is a device, only a few micrometres thick, that combines two different semiconductors6 , one for the visible parts of the light spectrum7 and the other for infrared8 light.
Engineers from the German research centre Helmholtz-Zentrum Berlin created a new kind of tandem cell made from stacked silicon9 and perovskite with a certified10 efficiency of 24.16 percent.
|The air crash caused an unprecedented number of deaths.这次空难的死亡人数是空前的。 A flood of this sort is really unprecedented.这样大的洪水真是十年九不遇。|
|He underwent quite a conversion.他彻底变了。 Waste conversion is a part of the production process.废物处理是生产过程的一个组成部分。|
|v.（使）增强， （使）加剧( intensify的过去式和过去分词 )|
|Violence intensified during the night. 在夜间暴力活动加剧了。 The drought has intensified. 旱情加剧了。来自《简明英汉词典》|
|Really great men are essentially modest.真正的伟人大都很谦虚。 She is an essentially selfish person.她本质上是个自私自利的人。|
|Malcolm's contract will run in tandem with his existing one.马尔科姆的合同将与他手头的合同同时生效。 He is working in tandem with officials of the Serious Fraud Office.他正配合欺诈重案办公室的官员工作。|
|n.半导体( semiconductor的名词复数 )|
|Crystals may be insulators, semiconductors, or conductors. 晶体可以是绝缘体，半导体，或导体。来自辞典例句 Semiconductors containing such impurities are called p-type semiconductors. 含有这类杂质的半导体叫做P型半导体。来自辞典例句|
|This is a kind of atomic spectrum.这是一种原子光谱。 We have known much of the constitution of the solar spectrum.关于太阳光谱的构成，我们已了解不少。|
|Infrared is widely used in industry and medical science.红外线广泛应用于工业和医学科学。 Infrared radiation has wavelengths longer than those of visible light.红外辐射的波长比可见光的波长长。|
|This company pioneered the use of silicon chip.这家公司开创了使用硅片的方法。 A chip is a piece of silicon about the size of a postage stamp.芯片就是一枚邮票大小的硅片。|
|Doctors certified him as insane. 医生证明他精神失常。 The planes were certified airworthy. 飞机被证明适于航行。|
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