Thermal and Humidity Stability of Mixed Spacer Cations 2D Perovskite Solar Cells.

ABSTRACT: In this article, two different types of spacer cations, 1,4-butanediamonium (BDA²⁺) and 2-phenylethylammonium (PEA⁺) are co-used to prepare the perovskite precursor solutions with the formula of (BDA)_{1- a} (PEA₂) _a MA₄Pb₅X₁₆. By simply mixing the two spacer cations, the self-assembled polycrystalline films of (BDA)_0.8(PEA₂)_0.2MA₄Pb₅X₁₆ are obtained, and BDA²⁺ is located in the crystal grains and PEA⁺ is distributed on the surface. The films display a small exciton binding energy, uniformly distributed quantum wells and improved carrier transport. Besides, utilizing mixed spacer cations also in

SUBMITTER: Yu H 

PROVIDER: S-EPMC8224444 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature