Simultaneous achievement of defect passivation and carrier transport promotion by using emerald salt for methylammonium-free perovskite solar cells.

ABSTRACT: Defect passivation along with promoted charge transport is potentially an effective but seldom exploited strategy for high-performance perovskite solar cells (PSCs). Herein, the in situ defect passivation and carrier transport improvement are simultaneously realized by introducing a conductive polymer (i.e., emerald salt, ES) into the precursor solution of methylammonium (MA)-free perovskites. The interaction between ES and uncoordinated Pb²⁺ reduces defect density to suppress the non-radiative recombination. Moreover, ES can act as a "carrier driver" to promote the carrier transport due to its conductive feature, resulting in efficient PSC devices with a decent power conversion efficiency (PCE) of 23.0%, which is among the most efficient MA-free PSCs. The ES-based

SUBMITTER: Fan Z 

PROVIDER: S-EPMC9473495 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature