Improved Comprehensive Photovoltaic Performance and Mechanisms by Additive Engineering of TiCT MXene into CsPbIBr.

CsPbIBr is promising in the application of perovskite solar cells (PSCs) owing to its reasonable bandgap and good thermal stability. However, the reported power conversion efficiency (PCE) of the CsPbIBr solar cells is still much lower than that of the organic-inorganic hybrid PSCs, mainly due to relatively poor CsPbIBr crystal quality. Herein, additive engineering to the photoactive layer of CsPbIBr using the TiCT MXene nanosheets is reported.

Synergetic effects of a front ITO nanocylinder array and a back square Al array to enhance light absorption for organic solar cells.

Efficient light management is critical to obtain high performance for organic solar cells (OSCs), which aims to solve the contradiction between limited carrier extraction and light absorption for the normally employed photoactive layers generally having both short exciton diffusion lengths and low extinction coefficients. In this study, we introduce a simple and efficient light management structure consisting of a front indium tin oxide nanocylinder (ITO-NC) array and a back square Al array. Thanks to the synergetic effects of antireflection and light scattering induced by the ITO-NC array, together with the secondary scattering and localized surface plasmon resonance because of the square Al array, remarkably enhanced light absorption in a broad spectral range can be achieved.