TY - JOUR
T1 - Rb as an Alternative Cation for Templating Inorganic Lead-Free Perovskites for Solution Processed Photovoltaics
AU - Harikesh, P. C.
AU - Mulmudi, Hemant Kumar
AU - Ghosh, Biplab
AU - Goh, Teck Wee
AU - Teng, Yin Ting
AU - Thirumal, Krishnamoorthy
AU - Lockrey, Mark
AU - Weber, Klaus
AU - Koh, Teck Ming
AU - Li, Shuzhou
AU - Mhaisalkar, Subodh
AU - Mathews, Nripan
N1 - Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/10/25
Y1 - 2016/10/25
N2 - Even though perovskite solar cells have reached 22% efficiency within a very short span, the presence of lead is a major bottleneck to its commercial application. Tin and germanium based perovskites failed to be viable replacements due to the instability of their +2 oxidation states. Antimony could be a possible replacement, forming perovskites with structure A3M2X9. However, solution processing of Cs, organic ammonium based Sb perovskites result in the formation of the dimer phase with poor charge transport properties. Here we demonstrate that Rb can template the formation of the desired layered phase irrespective of processing methodologies, enabling the demonstration of efficient lead-free perovskite solar cells.
AB - Even though perovskite solar cells have reached 22% efficiency within a very short span, the presence of lead is a major bottleneck to its commercial application. Tin and germanium based perovskites failed to be viable replacements due to the instability of their +2 oxidation states. Antimony could be a possible replacement, forming perovskites with structure A3M2X9. However, solution processing of Cs, organic ammonium based Sb perovskites result in the formation of the dimer phase with poor charge transport properties. Here we demonstrate that Rb can template the formation of the desired layered phase irrespective of processing methodologies, enabling the demonstration of efficient lead-free perovskite solar cells.
UR - http://www.scopus.com/inward/record.url?scp=84993978188&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.6b03310
DO - 10.1021/acs.chemmater.6b03310
M3 - Article
SN - 0897-4756
VL - 28
SP - 7496
EP - 7504
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 20
ER -