Improving the photovoltaic performance of co‐evaporated Cu 2 ZnSnS 4 thin‐film solar cells by incorporation of sodium from NaF layers

We have investigated the influence of sodium (Na) on the properties of co‐evaporated Cu 2 ZnSnS 4 (CZTS) layer microstructures and solar cells. The photovoltaic performance and diode properties were improved by incorporating Na from NaF layers into the CZTS layers, while Na had a negligible effect o...

Full description

Saved in:
Bibliographic Details
Published in:Progress in photovoltaics 2016-07, Vol.24 (7), p.1009-1015
Main Authors: Mise, Takahiro, Tajima, Shin, Fukano, Tatsuo, Higuchi, Kazuo, Washio, Tsukasa, Jimbo, Kazuo, Katagiri, Hironori
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have investigated the influence of sodium (Na) on the properties of co‐evaporated Cu 2 ZnSnS 4 (CZTS) layer microstructures and solar cells. The photovoltaic performance and diode properties were improved by incorporating Na from NaF layers into the CZTS layers, while Na had a negligible effect on the microstructural properties of the layer. The best cell fabricated by using an optimal CZTS layer (Cu/(Zn + Sn) = 0.70, Zn/Sn = 1.8) yielded an active area efficiency of 5.23%. The analysis of device properties suggests that charge‐carrier recombination at CZTS/CdS interface is suppressed by intentional Na incorporation from NaF layers. Copyright © 2016 John Wiley & Sons, Ltd.
ISSN:1062-7995
1099-159X
DOI:10.1002/pip.2745