A Heterojunction Based on Macro-porous Silicon and Zinc Oxide for Solar Cell Application

A Heterojunction Based on Macro-porous Silicon and Zinc Oxide for Solar Cell Application

N. Mendoza-Agüero V. Agarwal H. I. Villafán-Vidales J. Campos-Alvarez P. J. Sebastian

Instituto de Energías Renovables-UNAM, Temixco, Morelos 62580, México

Centro de Investigación en Ingeniería y Ciencias Aplicadas-UAEM Av. Universidad 1001, Cuernavaca, Morelos, México

Corresponding Author Email: 
sjp@ier.unam.mx
Page: 
225-230
|
DOI: 
https://doi.org/10.14447/jnmes.v18i4.352
Received: 
27 September 2015
|
Accepted: 
30 October 2015
|
Published: 
29 November 2015
| Citation
Abstract: 

Transparent and conductive Al doped zinc oxide (AZO) films were reactively sputtered from metallic targets onto macro-porous silicon (MPS) substrate to fabricate a heterojunction interface structure. A tungsten oxide (WO3) thin film was placed between metallic aluminum back contact and bulk silicon to extract photogenerated holes from the absorber. Due to the susceptibility of PS to naturally oxidize over the period of time, a thin film of SiO2 was thermally grown to stabilize the electrical response of the junction. Such thin layer acts as passive film to prevent recombination and is placed between the p-n junction. Photovoltaic properties of this heterojunction were studied by using the current density-voltage (J-V) measurement under AM 1.5 illumination. The experimental results show an increase in photovoltaic performance of AZO/MPS solar cell with a buffer layers of WO3. Such heterostructures are promising for the development of the low-cost, clean, and durable devices with appreciable light-to-electricity conversion efficiency.

Keywords: 

heterojunction, solar cell, macro-porous silicon, zinc oxide, tungsten oxide

1. Introduction
2. Experiment Details
3. Results and Discussion
4. Conclusions
Acknowledgements

The authors appreciate the technical support received from Miss Maria Luisa Ramon and Mr. Gildardo Casarubias. This work was supported through the grants IT100413 and CONACYT 236978.

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