Gabriel E. PérezISIS Neutron and Muon Source · Crystallography Group
Gabriel E. Pérez
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Gabriel E. Pérez currently works at the Department of Chemical and Biological Engineering at the University of Sheffield as a postgraduate research student researching organic semiconductors with neutron scattering techniques for organic solar cells applications.
April 2020 - present
ISIS Neutron and Muon Source
- Research Associate
- I am currently working within the ISIS Crystallography Group, in collaboration with other members of the FutureCat project, to develop new methodologies for the study of new cathode materials for lithium batteries. This includes the design and commissioning of new devices for in-situ studies on the neutron beam and providing new software to obtain detailed structural information on the new materials.
September 2016 - December 2018
- Graduate Teaching Assistant
- Took a leading role in the teaching and grading of the Schottky Diode Fabrication Lab module, and the Solar Cell Design Project module for undergraduates at the University of Sheffield for the Multidisciplinary Engineering Education department.
August 2014 - July 2015
Tecnológico de Monterrey, Puebla, México
- Undergraduate Teacher
An anionic conjugated polyelectrolyte poly[(9,9-bis(4-sulfonatobutyl sodium) fluorene-alt-phenylene)- ran-(4,7-di-2-thienyl-2,1,3-benzothiadiazole-alt-phenylene)] which exhibits good solubility in water was synthesised via Suzuki-cross coupling. This conjugated polyelectrolyte was used as an additive in the hole transporting layer within organic ph...
Doping poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is known to improve its conductivity; however, little is known about the thin-film structure of PEDOT:PSS when doped with an asymmetrically charged dopant. In this study, PEDOT:PSS was doped with different concentrations of the zwitterion 3-(N,N dimethylmyristylammonio)prop...
The crystallization of poly(3-hexylthiophene) (P3HT) to form nanowires has attracted considerable interest because this process significantly increases the hole mobility when compared to amorphous P3HT, leading to improved performance in photovoltaic and other organic electronic devices. However, full characterization of the crystallization self-as...
The impact of the additive 1,8-diiodooctane on the morphology of bulk-heterojunction solar cells based on the systems P3HT:PC71BM, PTB7:PC71BM and PTB7-Th:PC71BM is studied using a combination of Small Angle Neutron Scattering (SANS) and Atomic Force Microscopy (AFM). The results clearly show that while in the P3HT:PC71BM system, the additive DIO p...
In a proof‐of‐concept study, this work demonstrates that incorporating a specifically designed block copolymer as an interfacial layer between a charge transport layer and the photoactive layer in organic solar cells can enhance the interface between these layers leading to both performance and stability improvements of the device. This is achieved...
Doping or alloying of the cations on the A-site and halides on the X site of ABX3 perovskites has been demonstrated as a successful technique for improving moisture stability of perovskite films for optoelectronic applications. Despite structural and electrical stability improvements, these films still undergo moisture induced degradation to Lead I...
The impact of several solvent processing additives (1-chloronaphthalene, methylnaphthalene, hexadecane, 1-phenyloctane, and p-anisaldehyde), 3% v/v in o-dichlorobenzene, on the performance and morphology of poly[(5,6-difluoro-2,1,3-benzothiadiazol-4,7-diyl)-alt-(3,3‴-di(2-octyldodecyl)-2,2′,5′,22033,5″,2‴-quaterthiophen-5,5‴-diyl)] (PffBT4T-2OD):[6...
Transitioning to electrified transport requires improvements in sustainability, energy density, power density, lifetime, and approved the cost of lithium-ion batteries, with significant opportunities remaining in the development of next-generation cathodes. This presents a highly complex, multiparameter optimization challenge, where developments in...
The interchain spacing and screening length modification of deuterated PSS (d-PSS) backbone chains in zwitterion-doped PEDOT:d-PSS were studied as a function of the doping concentration using small angle neutron scattering. Results suggest that the dopant, 3-(N,N-Dimethylmyristylammonio)propanesulfonate (DYMAP), forms worm-like micelle structures i...
To improve the efficiency of non-fullerene based organic solar cells by optimising different metal oxides as the electron and hole transporting layers.
To incorporate a P3HT based block co-polymer between the PEDOT:PSS hole transporting layer and the P3HT:PCBM active layer in organic solar cells to improve the performance and stability of devices.