Mixed cation perovskite solar cells (PSCs) have shown high stability over 1000 h under outdoor conditions. In this paper, we simulated fluorine-doped tin oxide/TiO2/(FAPbI3)0.85(MAPbBr3)0.15/ Spiro-OMeTAD solar cell as the base structure by SCAPS-1D software. We then studied the effects of E
V position of hole transport layer (HTL) and E
C position of electron transport layer (ETL) and carrier density of HTL and ETL, on the performance of the solar cells. Simulation results showed that the carrier density of HTL and ETL has outstanding effect on the performance of the mixed cation PSC through band alignment between the layers. Moreover, we studied the influence of defect density of ETL/perovskite and perovskite/HTL interface layers. According to simulation results, we predict that using Spiro-OMeTAD as HTL and Nb-doped TiO2 as ETL, that have shown capability of fabrication with PSCs, improves the power conversion efficiency to 19.75%.
In this paper, we analyze the dynamic characteristics of quantum dot (QD) photonic crystal lasers by solving Maxwell equations coupled to rate equations through linear susceptibility of QDs. Here, we study the effects of the quality factor of the microcavity and temperature on the delay, relaxation oscillation frequency, and output intensity of the lasers. Moreover, we investigate the dependence of the Purcell factor on temperature. We show that when the quality factor of the microcavity is so high that we can consider its linewidth as a delta function in comparison with QDs, the Purcell factor significantly drops with increasing temperature.
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