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chemistry

Michael Grätzel

Michael Grätzel is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Michael Grätzel rather than just read about it. In short: Michael Grätzel (born 11 May 1944, in Dorfchemnitz, Saxony, Germany) is a professor at the École Polytechnique Fédérale de Lausanne where he directs the Laboratory of Photonics and Interfaces. He pioneered research on energy and electron transfer reactions in mesoscopic-materials and their optoelectronic applications.

Michael Grätzel — main illustration
Michael Grätzel — illustration

Key takeaways

  • Michael Grätzel belongs to chemistry; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Michael Grätzel to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Michael Grätzel from memory before moving on to harder problems.

Reference excerpt

Michael Grätzel (born 11 May 1944, in Dorfchemnitz, Saxony, Germany) is a professor at the École Polytechnique Fédérale de Lausanne where he directs the Laboratory of Photonics and Interfaces. He pioneered research on energy and electron transfer reactions in mesoscopic-materials and their optoelectronic applications. He co-invented with Brian O'Regan the Grätzel cell in 1988. Grätzel has been called the "father of artificial photosynthesis". Grätzel is the author of over 1000 publications, two books and inventor or co-inventor of over 80 patents, he has been the Mary Upton Visiting Professor at Cornell University and a distinguished visiting professor at the National University of Singapore, and is currently a distinguished scientist at King Abdulaziz University. He was an invited professor at the University of California, Berkeley, the École normale supérieure Paris-Saclay and Delft University of Technology.

Education and career In 1968 he graduated from Free University of Berlin, in 1971 he earned the Doctor of Philosophy in natural science at Technische Universität Berlin. In 1976 he completed habilitation in physical chemistry at the Free University of Berlin. Since 1977 to the present day he is a professor at the École Polytechnique Fédérale de Lausanne in Lausanne, where he directs the Laboratory of Photonics and Interfaces. He worked as postdoctoral research fellow, lecturer, visiting professor at the Hahn-Meitner Institute, Free University of Berlin, University of California at Berkeley, Ecole Normale Supérieure de Cachan, Oil and Gas Research Fund, University of Notre Dame and other educational and research centers. In 1991, he published his breakthrough work in Nature magazine with regard to the new type of solar cells based on a three-dimensional array of tiny (mesoscopic) oxide semiconductor particles with wide band gap covered with an organic pigment that have brought the name of professor into repute and were named as Grätzel cells. Grätzel is the holder of 10 honorary doctorates in Universities of Asia and Europe: Denmark, Holland, China, Sweden, Singapore and other countries. He is the laureate of tens of prestigious scientific and engineering prizes, such as Grand Prix “Millennium Technology”, Medal of Faraday granted by British Royal Society, Gutenberg Prize, Albert Einstein Prize and others. Grätzel is a member of the Swiss Chemical Society, the Max Planck Society, and the German Academy of Science (Leopoldina), as well as an honorable member of the Israeli Chemical Society and the Bulgarian Academy of Science, an honorary fellow of the Royal Society of Chemistry, and a Fellow of the US-National Academy of Inventors.

Scientific achievements Grätzel is one of the inventors of dye-sensitized solar cells, the so-called Grätzel cells; a new type of solar cell, operating on similar principles as photosynthesis.

Recognition Grätzel's work has been cited over 515,000 times, his h-index is 315, making him one of the most highly cited chemists in the world. He was a frequent guest scientist at the National Renewable Energy Laboratory (NREL) in Golden, Colorado, was a fellow of the Japanese Society for the Promotion of Science. In 2009 he was named Distinguished Honorary Professor by the Chinese Academy of Science (Changchun) and the Huazhong University of Science and Technology. Grätzel has received numerous awards including the Millennium 2000 European innovation prize, the 2001 Faraday Medal of the British Royal Society, the 2001 Dutch Havinga Award, the 2004 Italgas Prize, two McKinsey Venture awards in 1998 and 2002 and the 2005 Gerischer Prize. In 2007 he was awarded the Harvey Prize of Technion for pioneered research on energy and electron transfer reactions in mesoscopic-materials and their optoelectronic applications. In 2009 he was awarded the Balzan Prize for the Science of New Materials. On 9 June 2010, Grätzel received the Millennium Technology Prize, for development of dye-sensitized solar cells. The cash prize, worth 800,000 euros, was awarded, in Helsinki, Finland, by the president of Finland, Tarja Halonen. His most recent awards include: 2011 Gutenberg Research Award; 2011 Paul Karrer Gold Medal; 2011 Wilhelm Exner Medal; 2012 Albert Einstein World Award of Science; and the 2013 Marcel Benoist Prize. In 2015 he received the King Faisal International Prize in Chemistry and in 2017 the Global Energy Prize "for transcendent merits in development of low cost and efficient solar cells, known as “Grätzel cells”, aimed to creation of cost-efficient, large-scale engineering solutions for power generation." In 2020 he received the BBVA Foundation Frontiers of Knowledge Award.

2025: Pour le Mérite for Sciences and Arts Grätzel holds honorary doctorates from Faculty of Science and Technology at Uppsala University, Sweden (1996), Turin and Nova Gorica. He was elected honorary member of the Société Vaudoise des Sciences Naturelles. Grätzel is a member of the scientific advisory committee at the IMDEA Nanoscience Institute.

See also

Grätzel cell (Dye-sensitized solar cell) Photoelectrochemical cell Perovskite solar cell

Notes and references

Illustrations

Michael Grätzel illustration

Worked examples

Example 1 — a first encounter with Michael Grätzel

Start with the simplest possible case. Write down what Michael Grätzel claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Michael Grätzel before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Michael Grätzel ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Michael Grätzel

In research
Michael Grätzel appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Michael Grätzel in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Michael Grätzel is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1944 births, 20th-century German chemists, 21st-century Swiss chemists, so understanding it makes those chapters shorter.
In everyday life
Look for Michael Grätzel outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Michael Grätzel in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Michael Grätzel means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Michael Grätzel out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Michael Grätzel in simple terms?

Michael Grätzel (born 11 May 1944, in Dorfchemnitz, Saxony, Germany) is a professor at the École Polytechnique Fédérale de Lausanne where he directs the Laboratory of Photonics and Interfaces. He pioneered research on energy and electron transfer reactions in mesoscopic-materials and their optoelec…

Why does Michael Grätzel matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Michael Grätzel?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Michael Grätzel.

Tags

  • 1944 births
  • 20th-century German chemists
  • 21st-century Swiss chemists
  • Academic staff of the École Polytechnique Fédérale de Lausanne
  • Albert Einstein World Award of Science Laureates
  • Dye-sensitized solar cells
  • Foreign members of the Chinese Academy of Sciences
  • Free University of Berlin alumni
  • Living people
  • Members of the German National Academy of Sciences Leopoldina
  • People associated with renewable energy
  • People from Saxony

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