TY - JOUR
T1 - Cesium Enhances Long-Term Stability of Lead Bromide Perovskite-Based Solar Cells
AU - Kulbak, Michael
AU - Gupta, Satyajit
AU - Kedem, Nir
AU - Levine, Igal
AU - Bendikov, Tatyana
AU - Hodes, Gary
AU - Cahen, David
N1 - Publisher Copyright: © 2015 American Chemical Society.
PY - 2016/1/7
Y1 - 2016/1/7
N2 - Direct comparison between perovskite-structured hybrid organic-inorganic methylammonium lead bromide (MAPbBr3) and all-inorganic cesium lead bromide (CsPbBr3), allows identifying possible fundamental differences in their structural, thermal and electronic characteristics. Both materials possess a similar direct optical band gap, but CsPbBr3 demonstrates a higher thermal stability than MAPbBr3. In order to compare device properties, we fabricated solar cells, with similarly synthesized MAPbBr3 or CsPbBr3, over mesoporous titania scaffolds. Both cell types demonstrated comparable photovoltaic performances under AM1.5 illumination, reaching power conversion efficiencies of ∼6% with a poly aryl amine-based derivative as hole transport material. Further analysis shows that Cs-based devices are as efficient as, and more stable than methylammonium-based ones, after aging (storing the cells for 2 weeks in a dry (relative humidity 15-20%) air atmosphere in the dark) for 2 weeks, under constant illumination (at maximum power), and under electron beam irradiation.
AB - Direct comparison between perovskite-structured hybrid organic-inorganic methylammonium lead bromide (MAPbBr3) and all-inorganic cesium lead bromide (CsPbBr3), allows identifying possible fundamental differences in their structural, thermal and electronic characteristics. Both materials possess a similar direct optical band gap, but CsPbBr3 demonstrates a higher thermal stability than MAPbBr3. In order to compare device properties, we fabricated solar cells, with similarly synthesized MAPbBr3 or CsPbBr3, over mesoporous titania scaffolds. Both cell types demonstrated comparable photovoltaic performances under AM1.5 illumination, reaching power conversion efficiencies of ∼6% with a poly aryl amine-based derivative as hole transport material. Further analysis shows that Cs-based devices are as efficient as, and more stable than methylammonium-based ones, after aging (storing the cells for 2 weeks in a dry (relative humidity 15-20%) air atmosphere in the dark) for 2 weeks, under constant illumination (at maximum power), and under electron beam irradiation.
KW - CsPbBr
KW - perovskite solar cells
KW - stability
UR - http://www.scopus.com/inward/record.url?scp=84954064307&partnerID=8YFLogxK
U2 - https://doi.org/10.1021/acs.jpclett.5b02597
DO - https://doi.org/10.1021/acs.jpclett.5b02597
M3 - مقالة
SN - 1948-7185
VL - 7
SP - 167
EP - 172
JO - The journal of physical chemistry letters
JF - The journal of physical chemistry letters
IS - 1
ER -