10.1016/j.tsf.2016.11.027
https://zenodo.org/records/240412
oai:zenodo.org:240412
Aniket Mule, Bart Vermang, M. Sylvester, Guy Brammertz, Samaneh Ranjbar, Thomas Schnabel, Nikhil Gampa, MarcMeuris, Jef Poortmans
Aniket Mule, Bart Vermang, M. Sylvester, Guy Brammertz, Samaneh Ranjbar, Thomas Schnabel, Nikhil Gampa, MarcMeuris, Jef Poortmans
0000-0003-2669-2087
Effect of different alkali (Li, Na, K, Rb, Cs)metals on Cu2ZnSnSe4 solar cells
Zenodo
2016
CZTSe solar cells; Alkali metals; Spin coating; Sodium; Potassium; Kesterites
2016-11-15
Creative Commons Attribution 4.0 International
It is well established that the addition of sodium (Na) to chalcopyrite or kesterite based solar cells markedly increases the solar cell performance. In this work, we explore the effect of Na and other alkali metals like potassium (K), rubidium, caesium and lithium (Li) – on pure selenide Cu2ZnSnSe4 (CZTSe) solar cells. We demonstrate the deposition of alkali metals using spin coating on e-beam evaporated metal precursors. The stack of metal precursors with alkali layer was then selenised at high temperatures to obtain a good quality CZTSe absorber. The diffusion of alkali metals into the absorber layer was confirmed using glow discharge optical emission spectroscopy. Samples doped with Na or K have shown improvement in the open circuit voltage. A maximum power conversion efficiency of 8.3% (without anti-reflection coating) and a top open circuit voltage 430 mV was achieved for combination of K and Na. Amongst the rest of alkali metals, Li looks the most promising dopant as far as optoelectronic properties are concerned.
Pre-print
European Commission
10.13039/501100000780
640868
Development of thin film Solar cells based on WIde band Gap kesterite absorbers