4:00 PM - 4:50 PM
[17p-P10-6] Electron Beam Irradiation Effect on Lead Halide Perovskite Solar Cell
Keywords:perovskite, radiation
Solar cells used in space such as artificial satellites and planetary probes need to be radiation-tolerant, because they are exposed to severe space radiations. Efficient but expensive GaAs tandem solar cells are commonly used as the space solar cells, whereas their radiation tolerances are insufficient. On the other hand, organic-inorganic lead halide perovskite solar cells (PSCs) are inexpensive, high power conversion efficiency (PCE), and possibly radiation-tolerant. Here we report the effect of electron beam (EB) irradiation on PSCs as evaluated by time-resolved microwave conductivity (TRMC), four probe measurements, and optical spectroscopy.
Although no deterioration was observed in the TRMC measurements of perovskite layer, the PCE of solar cell was decreased. EB irradiation to the Spiro-OMeTAD hole transport layer was found to cause the decrease in its conductivity and bleaching of photoabsorption. Given these results, we assumed that EB induces de-doping of Spiro-OMeTAD, and thus the decrease of PCE. Interestingly, we found that the conductivity and PCE can be partly recovered by irradiating a pseudo-sunlight.
Although no deterioration was observed in the TRMC measurements of perovskite layer, the PCE of solar cell was decreased. EB irradiation to the Spiro-OMeTAD hole transport layer was found to cause the decrease in its conductivity and bleaching of photoabsorption. Given these results, we assumed that EB induces de-doping of Spiro-OMeTAD, and thus the decrease of PCE. Interestingly, we found that the conductivity and PCE can be partly recovered by irradiating a pseudo-sunlight.