Capacitive measurement of the relative humidity in supercritical carbon dioxide

1995 ◽  
Vol 8 (1) ◽  
pp. 71-78 ◽  
Author(s):  
C. Wilp ◽  
R. Eggers ◽  
V. Schmidt-Dahl
Keyword(s):  
Carbon Dioxide ◽  
Relative Humidity ◽  
Supercritical Carbon Dioxide ◽  
Supercritical Carbon

scholarly journals Moisture Stability of Perovskite Solar Cells Processed in Supercritical Carbon Dioxide

Molecules ◽  
2021 ◽  
Vol 26 (24) ◽  
pp. 7570
Author(s):  
Gilbert Annohene ◽  
Gary Tepper
Keyword(s):  
Carbon Dioxide ◽  
Solar Cells ◽  
Relative Humidity ◽  
Supercritical Carbon Dioxide ◽  
Perovskite Solar Cells ◽  
Simultaneous Exposure ◽  
Different Temperatures ◽  
Moisture Stability ◽  
Different Levels ◽  
Supercritical Carbon

Performance degradation under environmental conditions currently limits the practical utility of perovskite-based solar cells. The moisture stability of CH3NH3PbI3 perovskite films and solar cells was measured during exposure to three different levels of relative humidity. The films were crystallized at two different temperatures with and without simultaneous exposure to supercritical carbon dioxide. The film crystallinity, optical absorption, and device photoconversion efficiency was measured over time for three relative humidity levels and both crystallization methods. It was determined that film crystallization in supercritical CO2 resulted in significant improvement in moisture stability for films processed at 50 °C, but negligible improvement in stability for films processed at 100 °C.

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