Love your Imperfections

At the onset of this blog, I interviewed Prof Aron Walsh about control defects within halide perovskites. The conclusion was that because charge carriers within this material behave as if there were no defects, doping the structure (i.e. adding some positively or negatively charged imperfections in the lattice) have no effect on the electrical properties. […]

What happened in January?

The perovskite field has been subject to an incredible momentum and is moving forward very fast. Here is a selection of interesting papers published in January. Editorial: Perovskite photovoltaics is 10 years old In 2009, Tsutomu Miyasaka published in JACS a paper reporting halide perovskite as a DSSC sensitizer. The editorial of Nature Energy in […]

A Few Notes on Photo-induced Phase Segregation

Tandem solar cells are a very promising technology that would allow to overpass the Shockley-Queisser efficiency limit for photovoltaic devices. They can be manufactured by stacking two solar devices, one of low band-gap (to absorb low-energy photons), on top of which is placed a high band-gap absorber (that would absorb the high-energy photons, therefore reducing […]

Understanding degradation of perovskites

Degradation of perovskite has been a well-developed topic on this blog. Actually, it represents one of the greatest challenges to address. Scientists try to tackle the degradation issues from many approach angles. Here I showcase two articles I’ve read in the past months about how the lattice evolves and how it leads to cell degradation: […]

The challenges of encapsulation

In previous articles, I presented instabilities within organic and perovskite solar cells. Most are due to the presence of water and oxygen. Therefore contrary to silicon modules, third generation solar cells degrade very fast when exposed to an oxygen and moisture atmosphere. For instance, an typical organic solar cell can degrade in just a few […]

The principles of organic solar cells

Organic and perovskite photovoltaics are the solar cell research fields with the greatest interest from the community. Many articles are published each week about it and for this reason, I will certainly write a lot about those two kinds of solar cells. Here I chose to present how do Organic Solar Cells work. Organic Materials? The […]

The History of Emerging PV

Less than a month ago, president Donald Trump took the outrageous decision to get out the Paris Agreement. Climate change is real. Climate change is disastrous for our lives, and not only for our children’s and grandchildren’s as we used to say. The Paris agreement aims at limiting global warming below +2°C. Renewable energies According […]

Emerging photovoltaics: Overview of the blog’s outline

Welcome to this blog. I’m Julien Barrier, you might know me for my tweets about organic electronics, perovskite solar cells and emerging photovoltaics. In addition with my tweets, I’ll issue articles about new and emerging photovoltaic technologies from July, 1st. I’ll publish regularly, i.e. each saturday. The articles In particular there will be four categories […]