Title :
Junction formation and interface effects in CZTSe solar cells
Author :
Bob, Brion ; Li, Jian V. ; Beall, C. ; Carapella, Jeff ; DeHart, Clay ; Yang Yang ; Repins, I.L.
Author_Institution :
Dept. of Mater. Sci. & Eng., Univ. of California, Los Angeles, Los Angeles, CA, USA
Abstract :
The space charge distribution across the CZTSe/CdS heterojunction plays an important role in defining the recombination properties of Kesterite solar cells. We have conducted a study designed to manipulate the shape of the space charge region and trigger changes in the magnitude of interface recombination present in our devices. In doing so, we have observed the creation and removal of a secondary barrier in the conduction band of coevaporated CZTSe cells, and found that completed devices do not exhibit the changes in device properties that would be expected for devices dominated by interface recombination.
Keywords :
cadmium compounds; conduction bands; copper compounds; semiconductor heterojunctions; solar cells; space charge; tin compounds; zinc compounds; CZTSe solar cells; Cu2ZnSnSe4-CdS; Kesterite solar cells; conduction band; heterojunction; interface effects; interface recombination; junction formation; recombination properties; secondary barrier; space charge distribution; Cadmium; Films; Heterojunctions; Lighting; Photovoltaic cells; Space charge; Photovoltaic cells; charge carrier processes; interface phenomena; space charge; thin film devices;
Conference_Titel :
Photovoltaic Specialist Conference (PVSC), 2014 IEEE 40th
Conference_Location :
Denver, CO
DOI :
10.1109/PVSC.2014.6925385