Effect of Sb and Na Incorporation in Cu2ZnSnS4 Solar Cells - Archive ouverte HAL Access content directly
Journal Articles physica status solidi (a) Year : 2019

Effect of Sb and Na Incorporation in Cu2ZnSnS4 Solar Cells

(1) , (1) , (1) , (1) , (1) , (2)
1
2

Abstract

Cu$_2$ZnSnS$_4$-based solar cells suffer from limited power conversion efficiency (PCE) and relative small grain size compared to selenium containing absorbers. Introduction of Na in Cu$_2$ZnSnS$_4$ absorbers either during the synthesis or after this step is used to improve device performances and to determine whether its effect is based on structural properties improvement (grain size enhancement, better crystallization) or on opto-electronic properties improvement (defect passivation). In both cases, presence of Na in the absorber notably improves current and voltage of the solar cells, but the effect is more pronounced when Na is present during synthesis. Quantum efficiency analysis shows that these improvements can be related to longer minority carrier diffusion length and reduced absorber/buffer interface recombination. Introducing Na in the process mostly leads to preferential (112) orientation of the crystal which is clearly correlated with better device performances. Otherwise, the performance limitation due to small grain size is discarded by the joint use of Sb and Na, which has a significant impact on grain size but does not affect solar cells efficiency.
Fichier principal
Vignette du fichier
19 Suzon - Effect of Sb and Na Incorporation in CZTS solar cells.pdf (2.59 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

cea-02474070 , version 1 (01-04-2020)

Identifiers

Cite

Abdul Aziz Suzon, Louis Grenet, Fabrice Emieux, Eric de Vito, Frédéric Roux, et al.. Effect of Sb and Na Incorporation in Cu2ZnSnS4 Solar Cells. physica status solidi (a), 2019, 216 (11), pp.1900070. ⟨10.1002/pssa.201900070⟩. ⟨cea-02474070⟩
54 View
78 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More