Effect of a 2D-Modification of Cs₂AgBiBr₆ on Nucleation and Contact Formation of Subsequently Deposited Hole Transport Layers as Revealed by <i>In Situ</i> Growth Studies.

ABSTRACT: A two-dimensional (2D) perovskite interlayer prepared by modification of a three-dimensional (3D) perovskite absorber with organic ammonium ions such as butylammonium (BA⁺) or phenethylammonium (PEA⁺) between the 3D perovskite and contact layers is widely known to significantly improve the performance of perovskite solar cells. This has also been confirmed previously for the lead-free double perovskite absorber Cs₂AgBiBr₆. In this work, film growth of copper phthalocyanine (CuPc) or pentacene (Pn), used as model hole transport materials (HTM), was investigated. Mimicking solar cell geometry, the HTMs were evaporated onto thin films of 2D perovskites BA₄AgBiBr₈ or PEA₄AgBiBr₈, as well as on 3D Cs_2</

SUBMITTER: Schneider TP 

PROVIDER: S-EPMC12903113 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature