Synergistic enhancement of efficiency and stability of perovskite solar cells via dual interface modification

Synergistically modifying electron transport layers and bottom buried perovskite layers of perovskite solar cells

“…The perovskite films deposited on the ELAA IBL showed a longer carrier distribution region and a larger PL intensity, which were consistent with the results of PL and TRPL and the average lifetime (t ave ) calculated from Table S1 (ESI †). These results are closely related to the reduction of perovskite vacancy defects and the improvement of the carrier transfer quality with the ELAA modification, 35 which will contribute to the improvement of V OC and FF of final PSCs. 36 We also calculated the trap state densities without and with the ELAA modification by the space charge limited current (SCLC) of ETL-only cells, as shown in Fig.…”

“…3h). 35 After the introduction of the ELAA IBL, the energy levels between the perovskite and SnO 2 were more matched, facilitating electron transport at the interface, while simultaneously increasing the hole transfer barrier to prevent the holes transferring to the SnO 2 ETL. Based on the UPS measurements, we present a schematic diagram illustrating the variation of the built-in electric field (BEF) in Fig.…”

Enhancing Stability and Resistive Memory Performance: The Role of Graphene in Hybrid Perovskite Composites

“…Recently, halide-based perovskite (HP) has emerged as one of the promising materials for various electronic and optoelectronic applications owing to its superior carrier mobility, long charge diffusion length, adjustable band gap, mechanical flexibility, and easy processability. − HP materials have appeared in the limelight after the solar cell’s record-breaking efficiency (∼28%) within a short period. With the immense exploration in perovskite photovoltaic, current–voltage ( I – V ) hysteresis has been witnessed by several groups. − The hysteresis loop is attributed to the migration of ions or defects inside the perovskite under an electric field.…”