“Laser in Betrieb” or “Laser in Use”. SPV Lab 227/228, Thomas Dittrich, Schwarzschildstr. 8, HZB)

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by summerstudent Nora Jung Sitting in my organic chemistry class two semesters ago, I heard the whispers of a word repeated often amongst my classmates. I was only in my second year of my undergrad and the pressure of finding a research position was a constant reminder in the back of my head. In January of 2022, I applied for the summer research position at HZB and it felt like a step in the right direction, but I was still unsure about what lay ahead. What does it mean to do research? Am I qualified enough? Will I know the right answers?Read More →

Picture: a sample of characterization done by Daniel with lots of patience.

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In: Corona, International, Summerstudents

During my studentship there is one thing I have discovered above all: patience. Patience is the mother of science, as the saying goes. And I have learned it the hard way. My project is a complex one; like most science projects. I’m trying to synthesize and characterize a new material to act as an absorber of light in solar cells. It is called: copper-barium diselenide. More specifically I want this material to be a top-cell absorber in tandem cells. In fact, this synthesis is not easy: little is known about the compound, and barium is very reactive with oxygen, so one must be very carefulRead More →

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In: International, Students, Summerstudents

“Be a diamond. Flourish under pressure” – Maureen Joyce Connolly To most people diamonds are well-known as the marvelous gemstones which used in a piece of jewelry. However, they are not only “a girl’s best friends”. Due to their remarkable physical and optical properties diamonds can be used by scientists and engineers as well! With this blogpost I’ll guide you through my research here at HZB and, hopefully, will share the delight and enjoyment of working with diamonds. Why diamonds? To have a better understanding of diamond it is useful to have a look at its crystalline structure. The strong sp3 covalent bonds between carbonRead More →

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In: Energymaterials, International, Summerstudents

Let’s spray and create samples ! In the institute of Solar Fuel, the main research is to produce hydrogen from sunlight and water. Hydrogen can be used to easily store energy and also directly for transportation. But how can we produce it? Only from the sunlight, a metal oxide semiconductor and water. Photons from sunlight will be absorbed by the metal oxide, and this will generate electrons and holes which oxidize or reduce water. The reaction between the electron and hole and the electrolyte allows to separate water in oxygen and hydrogen. Let’s see how we make this metal Oxide! SPRAY PYROLYSIS: The chemical methodRead More →

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In: Energymaterials, Summerstudents

Far-sighted hydrogen economy During one of the winter nights, while talking in the interior of Granite House, “well lighted with candles, well warmed with coal, after a good dinner”, the settlers of Jules Verne’s Mysterious Island were discussing about the fact that the coal will be entirely consumed. After a roughly estimation, Cyrus Harding, an engineer of great capabilities, concluded that it would happen “for at least two hundred and fifty or three hundred years.” To everyone’s surprise, when he was asked what they will burn instead of coal, he said: “Water”. “Water” cried Pencroft, “water as a fuel for steamers and engines! water toRead More →

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In: Energymaterials, Summerstudents

Have you ever been sitting in company, discussing ridiculous stories about your scars and injuries? Probably, yes. Once, I spent a whole evening talking about these funny cases with my friends. However, the story of the scar I got because of a hot radiator, was outshined by a guy who has gotten a serious burn while he was sleeping with a laptop on his knees. That day I didn’t believe his story, but later I noticed that occasionally my electronic devices heated up incredibly. “Nothing is perfect”, I thought and forgot about this episode for a while. A couple years later, I arrived in aRead More →

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In: International, Students, Summerstudents

If you try to search for “PSO” abbreviation in wiki you may find Pacific Symphony Orchestra or Phase-shift oscillator. However, my project at HZB is about neither music nor electricity, but mathematics. For almost a month here I have been working on an algorithm called Particle Swarm Optimization method and I would like you to have some impression of it.  Optimization Actually, the definition of optimization problem is quite simple. One has a function of n-variables f(x1, …, xn) and seeks to find such values of variables that give minimum to the function. However, the solution is not that simple, because in general you cannotRead More →

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In: Summerstudents

All summerstudents will present their projects in a conference at HZB Campus Wannsee on thursday 18 September. The conference will start at 11:00 with four talks. The speakers have been elected by the summerstudents themselves. After lunch, the poster session starts. Every student has prepared a poster presenting her or his project, the context, the motivation and what has been achieved during the two months project in summer 2017. An award is given to the best poster along criteria such as communications skills, layout and design, and – of course – scientific achievement. 11.00-12.00 Oral Presentations 13.30 -15:30 Poster session 16.00 Presentation of the posterRead More →