Multijunction solar cells, comprising hybrid perovskite absorbers would be attractive for space applications since they can be lightweight, flexible, and highly efficient. Motivated by this new generation of space solar cells, recent experiments havetried to demonstrate the ability of methyl ammonium lead iodide (CH3NH3PbI3) to withstand the harsh radiation environment in space. So far, however, studies have been limited to devices with low power conversion efficiencies of 12 %[1] or 4 %[2]. Further, Today’s best performing perovskite solar cells make use of a mixture of cesium (Cs+), methylammonium (CH3NH3+, MA) and formamidinium (HC(NH2)2+, FA) cations. In this work, we employ a variety of in-situ measurements to demonstrate, for the first time, that perovskite solar cells made from Cs0.05MA0.17FAz0.83Pb(I0.83Br0.17)3 are radiation hard and possess negligible degradation under high-energy, high-dose proton irradiation. Analyzing the radiation induced current during irradiation with 68 MeV and 20 MeV protons we found that Cs0.05MA0.17FAz0.83Pb(I0.83Br0.17)3 even exceeds the radiation hardness of SiC, which is often proposed to possess an excellent radiation hardness. Our optimized Cs0.05MA0.17FAz0.83Pb(I0.83Br0.17)3 based space solar cells reach efficiencies of 19.4 % under simulated AM0 illumination and maintain 95 % of their initial efficiency even after irradiation with protons at an energy 68 MeV and a total dose of 1012 p/cm^2. Interestingly, we observe a significant slower decay of the open circuit voltage and photoluminescence intensity after proton irradiation. This behaviorsuggests a complex interplay of the radiation induced defect formation and passivation.
Radiation Hardness of the Triple-Cation Perovskite Cs0.05MA0.17FA0.83Pb(I0.83Br0.17)3
G. Landi;H. C. Neitzert;
2018-01-01
Abstract
Multijunction solar cells, comprising hybrid perovskite absorbers would be attractive for space applications since they can be lightweight, flexible, and highly efficient. Motivated by this new generation of space solar cells, recent experiments havetried to demonstrate the ability of methyl ammonium lead iodide (CH3NH3PbI3) to withstand the harsh radiation environment in space. So far, however, studies have been limited to devices with low power conversion efficiencies of 12 %[1] or 4 %[2]. Further, Today’s best performing perovskite solar cells make use of a mixture of cesium (Cs+), methylammonium (CH3NH3+, MA) and formamidinium (HC(NH2)2+, FA) cations. In this work, we employ a variety of in-situ measurements to demonstrate, for the first time, that perovskite solar cells made from Cs0.05MA0.17FAz0.83Pb(I0.83Br0.17)3 are radiation hard and possess negligible degradation under high-energy, high-dose proton irradiation. Analyzing the radiation induced current during irradiation with 68 MeV and 20 MeV protons we found that Cs0.05MA0.17FAz0.83Pb(I0.83Br0.17)3 even exceeds the radiation hardness of SiC, which is often proposed to possess an excellent radiation hardness. Our optimized Cs0.05MA0.17FAz0.83Pb(I0.83Br0.17)3 based space solar cells reach efficiencies of 19.4 % under simulated AM0 illumination and maintain 95 % of their initial efficiency even after irradiation with protons at an energy 68 MeV and a total dose of 1012 p/cm^2. Interestingly, we observe a significant slower decay of the open circuit voltage and photoluminescence intensity after proton irradiation. This behaviorsuggests a complex interplay of the radiation induced defect formation and passivation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
