Facilitating the Carrier Transport Kinetics at the CsPbBr/Carbon Interface through SbX (X = Cl, Br, I) Passivation.

The nonradiative carrier recombination at the perovskite/carrier selective layer (CSL) interface was accounted for the inferior power conversion efficiency (PCE) of perovskite solar cells (PSCs), especially rigid all-inorganic perovskite (CsPbI and CsPbBr). In this study, targeting the poor interface, we introduce SbX (X = Cl, Br, I) surface passivation at the CsPbBr/carbon interface. Smoothed compressive strain, reduced defect density, and enhanced energy-level alignment were achieved simultaneously, facilitating carrier extraction at the selective interface.

Improved Perovskite/Carbon Interface through Hot-Pressing: A Case Study for CsPbBr-Based Perovskite Solar Cells.

Due to the low cost and printable nature of the carbon paste, carbon-based perovskite solar cells (PSCs) are attractive for real application. However, the poor contact at the perovskite/carbon interface obviously hinders the achievable fill factor of the carbon-based PSCs. In this work, we introduce a pressure-assisted method to improve the contact at the perovskite/carbon interface.

Embedding SnO Thin Shell Protected Ag Nanowires in SnO ETL to Enhance the Performance of Perovskite Solar Cells.

The energy level mismatching between SnO and perovskite and the nonradiative recombination at SnO-perovskite interface severely degrade the extraction of carriers, reducing the power conversion efficiency (PCE) and stability of planar perovskite solar cells (PSCs) based on SnO electron transfer layer (ETL). In the present work, a reinforced SnO ETL was successfully developed by embedding SnO thin shell protected Ag nanowires (Ag/SnO NWs) in traditional planar SnO film, which was proved to not only lower the conduction band of SnO to adjust the energy level matching, but also significantly reduce the interfacial carrier recombination. Moreover, Ag/SnO NWs improved the electrical conductivity of SnO ETL, and effectively promoted carrier transport.

Introduction of Multifunctional Triphenylamino Derivatives at the Perovskite/HTL Interface To Promote Efficiency and Stability of Perovskite Solar Cells.

Surface passivation is a widely used approach to promote the efficiency and stability of perovskite solar cells (PSCs). In the present project, a series of new organic surface passivation molecules, which contain the same triphenylamino group with the hole transfer material of PSCs, have been synthesized. These new passivation molecules are supposed to have both "carrier transfer" capability and "defect passivation" potential.