in lab


Julien Barrier

24, Parisian.

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I have been graduated in Chemical Physics from ESPCI in Paris. As championed by its former director, Nobel laureate Pierre-Gilles de Gennes, this Grande École distinctively educates its students about science at the crossroads of physics and chemistry, on both theoretical and practical levels.
I feel perfectly in line with its education paradigm:

What is expected from you ?

  1. a genuine, hands-on practice at the bench;
  2. self-built judgement: know how to learn from books, take notes, build charts on cross-disciplinary topics;
  3. a mixed culture: a physicist who is able to carry out basic chemical synthesis; a chemist who understands what to expect from his/her new molecules;
  4. and above all, be bold!

Pierre-Gilles de Gennes


As I have been made aware of global warming since my childhood, I now want to contribute to inventing solutions by carrying out research on emerging photovoltaics technologies. In 2017 I was hired by CEA (the French Alternative Energies Commission) as a 6-month intern to design and develop encapsulation materials for solar devices.

That unique experience provided me the legitimacy to take charge of the influence of mobile ions in the degradation processes of halide perovskite as a visiting student researcher at SLAC National Accelerator Laboratory (CA, U.S.A.) in 2018.
I am convinced that the perovskite is a class of materials that has the potential to impact the future of modern civilisation. My investigations may lead to meaningful industrial opportunities with great impact on energy saving and energy collection. I will follow up in September with a PhD under the supervision of Prof Sir Andre Geim and Prof Irina Grigorieva at the University of Manchester (U.K.) to create Van der Waals 2D heterostructure combining halide perovskites and graphene.

I am also the curator of a press review on hybrid and organic electronics, Check it out!

CEA is the French public research institution dedicated to nuclear and renewable energies. It was founded by President Charles de Gaulle after World War II, to warrant France’s sovereignty in the realm of energy and defense capabilities (including those based on nuclear reactions).
De Gaulle named Frédéric Joliot, the 1935 chemistry Nobel laureate and an ESPCI Alumnus as CEA’s founding director, thus ensuring that excellence be the main driver of the institution. CEA is currently ranked #1 by Reuters as the World most innovative research institution.

SLAC National Accelerator Laboratory, located in the heart of Silicon Valley, started in 1962 as the world’s largest linear accelerator on the joint initiative of Stanford University and the United States Department of Energy (DOE). Over the last 50 years, it has grown into a large and diverse 1,600 employees workforce performing cutting-edge research across a wide range of disciplines, including energy, cosmology and accelerator technologies. The top-notch research facilities, as well as the historical strengths in particle physics, allowed scientists at SLAC to discover the universe fundamental building blocks, leading to 6 Nobel prizes both in Physics and Chemistry.

Sir Andre Geim was awarded the Nobel Prize in Physics in 2010 for groundbreaking experiments regarding the two-dimensional material graphene

I’m always keen on interacting with – and learning from – new people, so please do not hesitate to contact me!

Disclaimer: Please be aware that even if I have been graduated from ESPCI, I’m still a student, so please be considerate if some mistakes crop up in this work.