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Enrique Barrigon

Position:    Postdoctoral Researcher

Phone:    +46-46-2223850
Cell phone:   
Room:    C366
Address:    Box 118
221 00 Lund

University:    Lund University
Division:    Solid State Physics
Research Area(s):    Materials Science
Interests:    Multijunction solar cells, nanowire solar cells, III-V materials, MOVPE, Aerotaxy



Nano-Tandem - Nanowire-Based Tandem Solar Cells

In May 2018, I joined the team of researchers in the Nano-Tandem project. The project was funded by H2020 (GA no 641023) and ended in April 2019. During the project, we have achieved considerable advances with respect to the state of the art of nanowire PV cells and their application in tandem cell architectures. The consortium has successfully demonstrated nanowire tandem cells and membranes and processes for the upscale of the technology to large area cells. I have contributed to this project with my skills in nanoprobe-enabled single nanowire measurements (see also Nano Lett. 2018, 18, 5, 3038-3046).
Although the original goal of the project was to develop high-efficiency photovoltaics for terrestrial applications, we have also managed to demonstrate that nanowire-based architectures have dramatically superior radiation performance relative to planar solar cell designs for space power systems (see also

NextNanoCells - Next generation nanowire solar cells

I started my employment at Lund University in 2015, funded by the NextNanoCells grant. This was funded by the EU Horizon H2020 programme (MSCA Individual Fellowship, Grant Agreement 656208) until April 2018.

The main goal of my research was to develop a specifically designed III-V nanowire-based solar cell to be subsequently connected to state-of-the-art high-efficiency bottom Si solar cell, thereby creating a multi-junction solar cell.
Tandem solar cell: a nanowire top cell is stacked on a Si-bottom cell 
Nanowire solar cells are an innovative and promising way to further reduce the cost of photovoltaic electricity for terrestrial applications.


Why is this important?

World electricity demand is steadily increasing over years and photovoltaic conversion of solar energy into electricity stands out as a clean, sustainable and reliable way of electricity production. The use of III-V materials in multi-junction solar cells opens up for extremely high conversion efficiencies (>38%). High efficiency and reduction of material use is the key for competitive prices of this technology.
Nanowire solar cell development includes synthesis of the materials and development of specific characterization tools of single nanowire solar cells. The work performed was structured around 4 main tasks:

  1. MOVPE growth of nanowires solar cells: A vast variety of core/shell nanowire solar cell structures has been developed by MOVPE such as GaAs/AlGaAs, GaAs/GaInP, GaAs/AlInP and GaAsP/AlInP, by carefully controlling structure, composition and doping of the wires. Prior growth, a well-defined array of Au particles on the GaAs substrates was deposited by means of nanoimprint lithography.


  3. Nanowire solar cell characterization: Enabled by a nanoprobe manipulator inside a scanning electron microscope (SEM), optoelectronic characterization at single nanowire level has been developed. In particular, a big piece of work has been done performing and understanding optoelectronic characteristics (e.g. EBIC and dark IV curves) of single nanowire solar cells and other type of devices such as first MJSC prototype structures within NWs, or InP photodetectors. As a result of these efforts, a new record efficiency of 15% of an InP NW solar cell has been obtained.


  5. Aerotaxy of nanowire solar cells: In collaboration with Sol Voltaics AB ( a functional single GaAs nanowire solar cell has been grown for the first time by Aerotaxy and a full optoelectronic characterization has been performed .


  7. Secondment at Sol Voltaics AB: Advanced characterization methods for nanowire based solar cells have been developed, together with mentoring of younger engineers and scientists.

The results have been published in peer-reviewed articles (see below).


Full-text author manuscripts of the publications that I have co-authored are available below or at the Lund University Research Portal 

GaAs Nanowire pn-Junctions Produced by Low-Cost and High-Throughput Aerotaxy.
E. Barrigón et al 2018 Nano Lett. 18, 2, 1088-1092.
DOI: 10.1021/acs.nanolett.7b04609
Download free full-text

Time-resolved photoluminescence characterization of
GaAs nanowire arrays on native substrate.
Vilgailė Dagytė et al 2017 Nanotechnology 28 505706.
Download the fulltext post-print author manuscript

InP/InAsP Nanowire-Based Spatially Separate Absorption and Multiplication Avalanche Photodetectors.
Vishal Jain et al 2017 ACS Photonics 4, 11, 2693-2698
DOI: 10.1021/acsphotonics.7b00389
Download free full-text

Effect of Ge autodoping during III-V MOVPE growth on Ge substrates.
Barrutia et al. JCrysGro, 475, 2017, 378-383
DOI: 10.1016/j.jcrysgro.2017.06.022
Download the fulltext post-print author manuscript

Degradation of Ge subcells by thermal load during the growth of multijunction solar cells.
Enrique Barrigón et al 2018 Prog Photovolt Res Appl.
26:102 – 111
DOI: 10.1002/pip.2948
Download free full-text

Understanding InP Nanowire Array Solar Cell Performance by Nanoprobe-Enabled Single Nanowire Measurements.
Gaute Otnes et al. 2018 Nano Lett. 18, 5, 3038-3046
DOI: 10.1021/acs.nanolett.8b00494
Download free full-text

EBIC measurement of nanowires for photovoltaics Spherical Image - RICOH THETA

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