Organic Electronics Research Group, UPIITA-IPN, Mexico City

05/10/2022

In order to improve the performance of organic solar cells, it is necessary to understand how they work. The active layer of these devices is typically irregular in morphology, so their performance depends not only on the transport parameters but also on the properties of the morphology. One of our analyzes related to this topic, "Analysis of Irregular Morphologies and Mobilities of Organic Solar Cells by Simulation", has been accepted to be presented at the 19th International Conference on Electrical Engineering, Computing Science and Automatic Control to be held in Mexico City , Mexico, on November 9-11, 2022.

Congreso , conference , international conference

20/09/2022

With our algorithm to generate irregular morphologies and once implementing a methodology to obtain the Current density−voltage characteristics of organic solar cells, we have been able to analyze the effect of the content of donor and acceptor material. As a result of this study, the paper entitled "The effect of the donor/acceptor ratio on organic solar cell performance" has been accepted to be presented at the XV International Conference on Surfaces, Materials and Vacuum September 26th - 29th, 2022 / Puerto Vallarta, Jalisco, Mexico.

https://www.smctsm.org.mx/XV_ICSMV/

20/09/2022

https://www.youtube.com/watch?v=UEAqMdxRms8

This paper theoretically analyzes the built-in electric field distribution in bulk heterojunction solar cells. The approach proposed leads to explore the imp...

17/08/2022

How do you imagine the solar cells of the future? 🤔

16/08/2022

Our work about irregular morphologies of
bulk-heterojunction solar cells has been accepted for
presentation at the 22nd International Conference on
Numerical Simulation of Optoelectronic Devices scheduled on September 12-16, 2022 and hosted by Politecnico di Torino, Italy.

It is already included in the advance program at https://www.nusod.org/2022/conf_program.html

Solar Cells and Photovoltaics

SC01 Built-in electric field in irregular morphologies of bulk-heterojunction solar cells ; I.C. Flores-Contreras, V. Cabrera-Arenas, L.M. Resendiz-Mendoza

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16/08/2022

The master's students who have participated in these projects have developed algorithms to calculate light absorption, charge transport and evaluate the different models of carrier recombination in organic solar cells. These types of solar cells have attracted attention because they are light, flexible and cheaper than conventional inorganic solar cells.

The works that are currently being developed in our UPIITA-IPN research group are:
1. Algorithm to generate 2D irregular morphologies of bulk heterojunction organic solar cells.
2. Analysis and design of photovoltaic solar tree structures

16/08/2022

In Mexico there is a strong interest in promoting projects related to the generation of clean and renewable electricity. For the current government, the generation of electricity is a key point to guarantee the well-being and development of our society. It is for this and other important reasons that in our research group we have worked for several years and we are still interested in developing a strong theoretical knowledge in solar cells. Our main purpose is to develop computational tools that allow us to improve the performance of solar cells. We make these tools through algorithms implemented in Matlab that solve differential equations, describe the physical mechanisms, calculate the power conversion efficiencies and give a graphical response to the behavior of these devices.

07/06/2016

Here we present a proposal to model the recombination mechanism via trap distributions in organic semiconductors.

http://dx.doi.org/10.1007/s10825-016-0835-0

So far, the model and the number of parameters that have been used in the literature to describe the recombination mechanism in an organic semiconductor depend on the type of trap distribution assumed. Because using only one particular recombination model could be relevant for the design of a comput...

16/05/2016

A brief summary (in spanish) of the theoretical research work we have done:

http://www.boletin.upiita.ipn.mx/index.php/ciencia/664-cyt-numero-54/1273-investigacion-teorica-sobre-celdas-solares-organicas-en-la-upiita-ipn

12/10/2015

The equations to calculate the electron and hole densities in an organic semiconductor can be obtained from the densities of states and the Fermi-Dirac distribution function. According to Blakesley and Greenham, the carrier density can be obtained by considering the Boltzmann approximation as it is explained in the following paper:

http://dx.doi.org/10.1063/1.3187787

We investigate the band bending that occurs at the interface between a disordered organic semiconductor and a metal electrode. Ultraviolet photoemission spectroscopy measurements of thin organic layers on conducting substrates have revealed band bending within a few nanometers of the interface. It h…

12/10/2015

The electrical behavior of organic solar cells has been also simulated. We have solved the system of diferential equations by numerical methods. The results have been publicated in the following paper:

http://dx.doi.org/10.1016/j.cpc.2015.07.006

10/10/2015

By using the optical transfer-matrix theory, we analyzed also the conversion performance of conventional organic photovoltaic and inverted organic photovoltaic devices with an active layer of polymer, PTB7:PCBM.

http://dx.doi.org/10.1117/1.JPE.5.052098

Unidad Profesional Interdisciplinaria en Ingeniería y Tecnologías Avanzadas del Instituto Politécnico Nacional, D. F., 07340, México