Superior Textured Film and Process Tolerance Enabled by Intermediate-State Engineering for High-Efficiency Perovskite Solar Cells.

ABSTRACT: As the power conversion efficiency (PCE) of perovskite solar cells (PSCs) is increased to as high over 25%, it becomes pre-eminent to study a scalable process with wide processing window to fabricate large-area uniform perovskite films with good light-trapping performance. A stable and uniform intermediate-state complex film is obtained by using tetramethylene sulfoxide (TMSO), which extends the annealing window to as long as 20 min, promotes the formation of a high-quality perovskite film with larger grains (over 400 nm) and spontaneously forms the surface texture to result in an improved fill factor and open-circuit voltage (V _oc). Moreover, the superior surface texture significantly increases the long-wavelength response, leading to an improved short-circuit current de

SUBMITTER: Wang S 

PROVIDER: S-EPMC7055579 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature