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Título del libro: 2014 Ieee 40th Photovoltaic Specialist Conference, Pvsc 2014
Título del capítulo: Study of the previous light-soaking effect on annealed hydrogenated polymorphous silicon solar cells structures

Autores UNAM:
BETSABEE MAREL MONROY PELAEZ; GUILLERMO SANTANA RODRIGUEZ;
Autores externos:

Idioma:
Inglés
Año de publicación:
2014
Palabras clave:

Hydrogen; Optical properties; Photodegradation; Silicon compounds; Solar cells; Spectroscopic ellipsometry; Thin films; Degradation process; Hydrogen diffusion barriers; Long range motion; Long-range diffusion; Optoelectronic properties; Photovoltaic structures; Polymorphous silicon; raman; Silicon solar cells


Resumen:

This work describes a study performed on pm-Si:H PIN and NIP structures, deposited by PECVD. We show the effect of light-soaking (AM1.5) on pm-Si:H thin films structures optical properties. We propose a model for long range diffusion of hydrogen through the whole device. From the evolution of Raman spectra after annealing, we show that this long range motion of hydrogen causes a hydrogen rearrangement on the film along with a shift on the exodiffusion peaks explaining the degradation process in this type of devices. As a result we determined that for the PIN structure a hydrogen diffusion barrier is generated by defects, which causes a less degradation of its optoelectronic properties under illumination, and a more stable device during operation is expected. © 2014 IEEE.


Entidades citadas de la UNAM: